aboutsummaryrefslogtreecommitdiff
path: root/gcc/varasm.c
blob: ec6aabf3d8e110e3db2e74f6564305143bba9d78 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
/* Output variables, constants and external declarations, for GNU compiler.
   Copyright (C) 1987-2015 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */


/* This file handles generation of all the assembler code
   *except* the instructions of a function.
   This includes declarations of variables and their initial values.

   We also output the assembler code for constants stored in memory
   and are responsible for combining constants with the same value.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "rtl.h"
#include "tree.h"
#include "predict.h"
#include "tm_p.h"
#include "stringpool.h"
#include "regs.h"
#include "emit-rtl.h"
#include "cgraph.h"
#include "diagnostic-core.h"
#include "fold-const.h"
#include "stor-layout.h"
#include "varasm.h"
#include "flags.h"
#include "stmt.h"
#include "expr.h"
#include "expmed.h"
#include "output.h"
#include "langhooks.h"
#include "debug.h"
#include "common/common-target.h"
#include "asan.h"
#include "rtl-iter.h"

#ifdef XCOFF_DEBUGGING_INFO
#include "xcoffout.h"		/* Needed for external data declarations.  */
#endif

/* The (assembler) name of the first globally-visible object output.  */
extern GTY(()) const char *first_global_object_name;
extern GTY(()) const char *weak_global_object_name;

const char *first_global_object_name;
const char *weak_global_object_name;

struct addr_const;
struct constant_descriptor_rtx;
struct rtx_constant_pool;

#define n_deferred_constants (crtl->varasm.deferred_constants)

/* Number for making the label on the next
   constant that is stored in memory.  */

static GTY(()) int const_labelno;

/* Carry information from ASM_DECLARE_OBJECT_NAME
   to ASM_FINISH_DECLARE_OBJECT.  */

int size_directive_output;

/* The last decl for which assemble_variable was called,
   if it did ASM_DECLARE_OBJECT_NAME.
   If the last call to assemble_variable didn't do that,
   this holds 0.  */

tree last_assemble_variable_decl;

/* The following global variable indicates if the first basic block
   in a function belongs to the cold partition or not.  */

bool first_function_block_is_cold;

/* Whether we saw any functions with no_split_stack.  */

static bool saw_no_split_stack;

static const char *strip_reg_name (const char *);
static int contains_pointers_p (tree);
#ifdef ASM_OUTPUT_EXTERNAL
static bool incorporeal_function_p (tree);
#endif
static void decode_addr_const (tree, struct addr_const *);
static hashval_t const_hash_1 (const tree);
static int compare_constant (const tree, const tree);
static void output_constant_def_contents (rtx);
static void output_addressed_constants (tree);
static unsigned HOST_WIDE_INT output_constant (tree, unsigned HOST_WIDE_INT,
					       unsigned int, bool);
static void globalize_decl (tree);
static bool decl_readonly_section_1 (enum section_category);
#ifdef BSS_SECTION_ASM_OP
#ifdef ASM_OUTPUT_ALIGNED_BSS
static void asm_output_aligned_bss (FILE *, tree, const char *,
				    unsigned HOST_WIDE_INT, int)
     ATTRIBUTE_UNUSED;
#endif
#endif /* BSS_SECTION_ASM_OP */
static void mark_weak (tree);
static void output_constant_pool (const char *, tree);
static void handle_vtv_comdat_section (section *, const_tree);

/* Well-known sections, each one associated with some sort of *_ASM_OP.  */
section *text_section;
section *data_section;
section *readonly_data_section;
section *sdata_section;
section *ctors_section;
section *dtors_section;
section *bss_section;
section *sbss_section;

/* Various forms of common section.  All are guaranteed to be nonnull.  */
section *tls_comm_section;
section *comm_section;
section *lcomm_section;

/* A SECTION_NOSWITCH section used for declaring global BSS variables.
   May be null.  */
section *bss_noswitch_section;

/* The section that holds the main exception table, when known.  The section
   is set either by the target's init_sections hook or by the first call to
   switch_to_exception_section.  */
section *exception_section;

/* The section that holds the DWARF2 frame unwind information, when known.
   The section is set either by the target's init_sections hook or by the
   first call to switch_to_eh_frame_section.  */
section *eh_frame_section;

/* asm_out_file's current section.  This is NULL if no section has yet
   been selected or if we lose track of what the current section is.  */
section *in_section;

/* True if code for the current function is currently being directed
   at the cold section.  */
bool in_cold_section_p;

/* The following global holds the "function name" for the code in the
   cold section of a function, if hot/cold function splitting is enabled
   and there was actually code that went into the cold section.  A
   pseudo function name is needed for the cold section of code for some
   debugging tools that perform symbolization. */
tree cold_function_name = NULL_TREE;

/* A linked list of all the unnamed sections.  */
static GTY(()) section *unnamed_sections;

/* Return a nonzero value if DECL has a section attribute.  */
#define IN_NAMED_SECTION(DECL) \
  ((TREE_CODE (DECL) == FUNCTION_DECL || TREE_CODE (DECL) == VAR_DECL) \
   && DECL_SECTION_NAME (DECL) != NULL)

struct section_hasher : ggc_ptr_hash<section>
{
  typedef const char *compare_type;

  static hashval_t hash (section *);
  static bool equal (section *, const char *);
};

/* Hash table of named sections.  */
static GTY(()) hash_table<section_hasher> *section_htab;

struct object_block_hasher : ggc_ptr_hash<object_block>
{
  typedef const section *compare_type;

  static hashval_t hash (object_block *);
  static bool equal (object_block *, const section *);
};

/* A table of object_blocks, indexed by section.  */
static GTY(()) hash_table<object_block_hasher> *object_block_htab;

/* The next number to use for internal anchor labels.  */
static GTY(()) int anchor_labelno;

/* A pool of constants that can be shared between functions.  */
static GTY(()) struct rtx_constant_pool *shared_constant_pool;

/* Helper routines for maintaining section_htab.  */

bool
section_hasher::equal (section *old, const char *new_name)
{
  return strcmp (old->named.name, new_name) == 0;
}

hashval_t
section_hasher::hash (section *old)
{
  return htab_hash_string (old->named.name);
}

/* Return a hash value for section SECT.  */

static hashval_t
hash_section (section *sect)
{
  if (sect->common.flags & SECTION_NAMED)
    return htab_hash_string (sect->named.name);
  return sect->common.flags;
}

/* Helper routines for maintaining object_block_htab.  */

inline bool
object_block_hasher::equal (object_block *old, const section *new_section)
{
  return old->sect == new_section;
}

hashval_t
object_block_hasher::hash (object_block *old)
{
  return hash_section (old->sect);
}

/* Return a new unnamed section with the given fields.  */

section *
get_unnamed_section (unsigned int flags, void (*callback) (const void *),
		     const void *data)
{
  section *sect;

  sect = ggc_alloc<section> ();
  sect->unnamed.common.flags = flags | SECTION_UNNAMED;
  sect->unnamed.callback = callback;
  sect->unnamed.data = data;
  sect->unnamed.next = unnamed_sections;

  unnamed_sections = sect;
  return sect;
}

/* Return a SECTION_NOSWITCH section with the given fields.  */

static section *
get_noswitch_section (unsigned int flags, noswitch_section_callback callback)
{
  section *sect;

  sect = ggc_alloc<section> ();
  sect->noswitch.common.flags = flags | SECTION_NOSWITCH;
  sect->noswitch.callback = callback;

  return sect;
}

/* Return the named section structure associated with NAME.  Create
   a new section with the given fields if no such structure exists.  */

section *
get_section (const char *name, unsigned int flags, tree decl)
{
  section *sect, **slot;

  slot = section_htab->find_slot_with_hash (name, htab_hash_string (name),
					    INSERT);
  flags |= SECTION_NAMED;
  if (*slot == NULL)
    {
      sect = ggc_alloc<section> ();
      sect->named.common.flags = flags;
      sect->named.name = ggc_strdup (name);
      sect->named.decl = decl;
      *slot = sect;
    }
  else
    {
      sect = *slot;
      if ((sect->common.flags & ~SECTION_DECLARED) != flags
	  && ((sect->common.flags | flags) & SECTION_OVERRIDE) == 0)
	{
	  /* It is fine if one of the section flags is
	     SECTION_WRITE | SECTION_RELRO and the other has none of these
	     flags (i.e. read-only) in named sections and either the
	     section hasn't been declared yet or has been declared as writable.
	     In that case just make sure the resulting flags are
	     SECTION_WRITE | SECTION_RELRO, ie. writable only because of
	     relocations.  */
	  if (((sect->common.flags ^ flags) & (SECTION_WRITE | SECTION_RELRO))
	      == (SECTION_WRITE | SECTION_RELRO)
	      && (sect->common.flags
		  & ~(SECTION_DECLARED | SECTION_WRITE | SECTION_RELRO))
		 == (flags & ~(SECTION_WRITE | SECTION_RELRO))
	      && ((sect->common.flags & SECTION_DECLARED) == 0
		  || (sect->common.flags & SECTION_WRITE)))
	    {
	      sect->common.flags |= (SECTION_WRITE | SECTION_RELRO);
	      return sect;
	    }
	  /* Sanity check user variables for flag changes.  */
	  if (sect->named.decl != NULL
	      && DECL_P (sect->named.decl)
	      && decl != sect->named.decl)
	    {
	      if (decl != NULL && DECL_P (decl))
		error ("%+D causes a section type conflict with %D",
		       decl, sect->named.decl);
	      else
		error ("section type conflict with %D", sect->named.decl);
	      inform (DECL_SOURCE_LOCATION (sect->named.decl),
		      "%qD was declared here", sect->named.decl);
	    }
	  else if (decl != NULL && DECL_P (decl))
	    error ("%+D causes a section type conflict", decl);
	  else
	    error ("section type conflict");
	  /* Make sure we don't error about one section multiple times.  */
	  sect->common.flags |= SECTION_OVERRIDE;
	}
    }
  return sect;
}

/* Return true if the current compilation mode benefits from having
   objects grouped into blocks.  */

static bool
use_object_blocks_p (void)
{
  return flag_section_anchors;
}

/* Return the object_block structure for section SECT.  Create a new
   structure if we haven't created one already.  Return null if SECT
   itself is null.  */

static struct object_block *
get_block_for_section (section *sect)
{
  struct object_block *block;

  if (sect == NULL)
    return NULL;

  object_block **slot
    = object_block_htab->find_slot_with_hash (sect, hash_section (sect),
					      INSERT);
  block = *slot;
  if (block == NULL)
    {
      block = ggc_cleared_alloc<object_block> ();
      block->sect = sect;
      *slot = block;
    }
  return block;
}

/* Create a symbol with label LABEL and place it at byte offset
   OFFSET in BLOCK.  OFFSET can be negative if the symbol's offset
   is not yet known.  LABEL must be a garbage-collected string.  */

static rtx
create_block_symbol (const char *label, struct object_block *block,
		     HOST_WIDE_INT offset)
{
  rtx symbol;
  unsigned int size;

  /* Create the extended SYMBOL_REF.  */
  size = RTX_HDR_SIZE + sizeof (struct block_symbol);
  symbol = (rtx) ggc_internal_alloc (size);

  /* Initialize the normal SYMBOL_REF fields.  */
  memset (symbol, 0, size);
  PUT_CODE (symbol, SYMBOL_REF);
  PUT_MODE (symbol, Pmode);
  XSTR (symbol, 0) = label;
  SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_HAS_BLOCK_INFO;

  /* Initialize the block_symbol stuff.  */
  SYMBOL_REF_BLOCK (symbol) = block;
  SYMBOL_REF_BLOCK_OFFSET (symbol) = offset;

  return symbol;
}

/* Return a section with a particular name and with whatever SECTION_*
   flags section_type_flags deems appropriate.  The name of the section
   is taken from NAME if nonnull, otherwise it is taken from DECL's
   DECL_SECTION_NAME.  DECL is the decl associated with the section
   (see the section comment for details) and RELOC is as for
   section_type_flags.  */

section *
get_named_section (tree decl, const char *name, int reloc)
{
  unsigned int flags;

  if (name == NULL)
    {
      gcc_assert (decl && DECL_P (decl) && DECL_SECTION_NAME (decl));
      name = DECL_SECTION_NAME (decl);
    }

  flags = targetm.section_type_flags (decl, name, reloc);
  return get_section (name, flags, decl);
}

/* Worker for resolve_unique_section.  */

static bool
set_implicit_section (struct symtab_node *n, void *data ATTRIBUTE_UNUSED)
{
  n->implicit_section = true;
  return false;
}

/* If required, set DECL_SECTION_NAME to a unique name.  */

void
resolve_unique_section (tree decl, int reloc ATTRIBUTE_UNUSED,
			int flag_function_or_data_sections)
{
  if (DECL_SECTION_NAME (decl) == NULL
      && targetm_common.have_named_sections
      && (flag_function_or_data_sections
	  || DECL_COMDAT_GROUP (decl)))
    {
      targetm.asm_out.unique_section (decl, reloc);
      if (DECL_SECTION_NAME (decl))
	symtab_node::get (decl)->call_for_symbol_and_aliases
	  (set_implicit_section, NULL, true);
    }
}

#ifdef BSS_SECTION_ASM_OP

#ifdef ASM_OUTPUT_ALIGNED_BSS

/* Utility function for targets to use in implementing
   ASM_OUTPUT_ALIGNED_BSS.
   ??? It is believed that this function will work in most cases so such
   support is localized here.  */

static void
asm_output_aligned_bss (FILE *file, tree decl ATTRIBUTE_UNUSED,
			const char *name, unsigned HOST_WIDE_INT size,
			int align)
{
  switch_to_section (bss_section);
  ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT));
#ifdef ASM_DECLARE_OBJECT_NAME
  last_assemble_variable_decl = decl;
  ASM_DECLARE_OBJECT_NAME (file, name, decl);
#else
  /* Standard thing is just output label for the object.  */
  ASM_OUTPUT_LABEL (file, name);
#endif /* ASM_DECLARE_OBJECT_NAME */
  ASM_OUTPUT_SKIP (file, size ? size : 1);
}

#endif

#endif /* BSS_SECTION_ASM_OP */

#ifndef USE_SELECT_SECTION_FOR_FUNCTIONS
/* Return the hot section for function DECL.  Return text_section for
   null DECLs.  */

static section *
hot_function_section (tree decl)
{
  if (decl != NULL_TREE
      && DECL_SECTION_NAME (decl) != NULL
      && targetm_common.have_named_sections)
    return get_named_section (decl, NULL, 0);
  else
    return text_section;
}
#endif

/* Return section for TEXT_SECTION_NAME if DECL or DECL_SECTION_NAME (DECL)
   is NULL.

   When DECL_SECTION_NAME is non-NULL and it is implicit section and
   NAMED_SECTION_SUFFIX is non-NULL, then produce section called
   concatenate the name with NAMED_SECTION_SUFFIX.
   Otherwise produce "TEXT_SECTION_NAME.IMPLICIT_NAME".  */

section *
get_named_text_section (tree decl,
		        const char *text_section_name,
		        const char *named_section_suffix)
{
  if (decl && DECL_SECTION_NAME (decl))
    {
      if (named_section_suffix)
	{
	  const char *dsn = DECL_SECTION_NAME (decl);
	  const char *stripped_name;
	  char *name, *buffer;

	  name = (char *) alloca (strlen (dsn) + 1);
	  memcpy (name, dsn,
		  strlen (dsn) + 1);

	  stripped_name = targetm.strip_name_encoding (name);

	  buffer = ACONCAT ((stripped_name, named_section_suffix, NULL));
	  return get_named_section (decl, buffer, 0);
	}
      else if (symtab_node::get (decl)->implicit_section)
	{
	  const char *name;

	  /* Do not try to split gnu_linkonce functions.  This gets somewhat
	     slipperly.  */
	  if (DECL_COMDAT_GROUP (decl) && !HAVE_COMDAT_GROUP)
	    return NULL;
	  name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
	  name = targetm.strip_name_encoding (name);
	  return get_named_section (decl, ACONCAT ((text_section_name, ".",
				                   name, NULL)), 0);
	}
      else
	return NULL;
    }
  return get_named_section (decl, text_section_name, 0);
}

/* Choose named function section based on its frequency.  */

section *
default_function_section (tree decl, enum node_frequency freq,
			  bool startup, bool exit)
{
#if defined HAVE_LD_EH_GC_SECTIONS && defined HAVE_LD_EH_GC_SECTIONS_BUG
  /* Old GNU linkers have buggy --gc-section support, which sometimes
     results in .gcc_except_table* sections being garbage collected.  */
  if (decl
      && symtab_node::get (decl)->implicit_section)
    return NULL;
#endif

  if (!flag_reorder_functions
      || !targetm_common.have_named_sections)
    return NULL;
  /* Startup code should go to startup subsection unless it is
     unlikely executed (this happens especially with function splitting
     where we can split away unnecessary parts of static constructors.  */
  if (startup && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED)
  {
    /* If we do have a profile or(and) LTO phase is executed, we do not need
       these ELF section.  */
    if (!in_lto_p || !flag_profile_values)
      return get_named_text_section (decl, ".text.startup", NULL);
    else
      return NULL;
  }

  /* Similarly for exit.  */
  if (exit && freq != NODE_FREQUENCY_UNLIKELY_EXECUTED)
    return get_named_text_section (decl, ".text.exit", NULL);

  /* Group cold functions together, similarly for hot code.  */
  switch (freq)
    {
      case NODE_FREQUENCY_UNLIKELY_EXECUTED:
	return get_named_text_section (decl, ".text.unlikely", NULL);
      case NODE_FREQUENCY_HOT:
        /* If we do have a profile or(and) LTO phase is executed, we do not need
           these ELF section.  */
        if (!in_lto_p || !flag_profile_values)
          return get_named_text_section (decl, ".text.hot", NULL);
      default:
	return NULL;
    }
}

/* Return the section for function DECL.

   If DECL is NULL_TREE, return the text section.  We can be passed
   NULL_TREE under some circumstances by dbxout.c at least.

   If FORCE_COLD is true, return cold function section ignoring
   the frequency info of cgraph_node.  */

static section *
function_section_1 (tree decl, bool force_cold)
{
  section *section = NULL;
  enum node_frequency freq = NODE_FREQUENCY_NORMAL;
  bool startup = false, exit = false;

  if (decl)
    {
      struct cgraph_node *node = cgraph_node::get (decl);

      if (node)
	{
	  freq = node->frequency;
	  startup = node->only_called_at_startup;
	  exit = node->only_called_at_exit;
	}
    }
  if (force_cold)
    freq = NODE_FREQUENCY_UNLIKELY_EXECUTED;

#ifdef USE_SELECT_SECTION_FOR_FUNCTIONS
  if (decl != NULL_TREE
      && DECL_SECTION_NAME (decl) != NULL)
    {
      if (targetm.asm_out.function_section)
	section = targetm.asm_out.function_section (decl, freq,
						    startup, exit);
      if (section)
	return section;
      return get_named_section (decl, NULL, 0);
    }
  else
    return targetm.asm_out.select_section
	    (decl, freq == NODE_FREQUENCY_UNLIKELY_EXECUTED,
	     symtab_node::get (decl)->definition_alignment ());
#else
  if (targetm.asm_out.function_section)
    section = targetm.asm_out.function_section (decl, freq, startup, exit);
  if (section)
    return section;
  return hot_function_section (decl);
#endif
}

/* Return the section for function DECL.

   If DECL is NULL_TREE, return the text section.  We can be passed
   NULL_TREE under some circumstances by dbxout.c at least.  */

section *
function_section (tree decl)
{
  /* Handle cases where function splitting code decides
     to put function entry point into unlikely executed section
     despite the fact that the function itself is not cold
     (i.e. it is called rarely but contains a hot loop that is
     better to live in hot subsection for the code locality).  */
  return function_section_1 (decl,
			     first_function_block_is_cold);
}

/* Return the section for the current function, take IN_COLD_SECTION_P
   into account.  */

section *
current_function_section (void)
{
  return function_section_1 (current_function_decl, in_cold_section_p);
}

/* Tell assembler to switch to unlikely-to-be-executed text section.  */

section *
unlikely_text_section (void)
{
  return function_section_1 (current_function_decl, true);
}

/* When called within a function context, return true if the function
   has been assigned a cold text section and if SECT is that section.
   When called outside a function context, return true if SECT is the
   default cold section.  */

bool
unlikely_text_section_p (section *sect)
{
  return sect == function_section_1 (current_function_decl, true);
}

/* Return the read-only data section associated with function DECL.  */

section *
default_function_rodata_section (tree decl)
{
  if (decl != NULL_TREE && DECL_SECTION_NAME (decl))
    {
      const char *name = DECL_SECTION_NAME (decl);

      if (DECL_COMDAT_GROUP (decl) && HAVE_COMDAT_GROUP)
        {
	  const char *dot;
	  size_t len;
	  char* rname;

	  dot = strchr (name + 1, '.');
	  if (!dot)
	    dot = name;
	  len = strlen (dot) + 8;
	  rname = (char *) alloca (len);

	  strcpy (rname, ".rodata");
	  strcat (rname, dot);
	  return get_section (rname, SECTION_LINKONCE, decl);
	}
      /* For .gnu.linkonce.t.foo we want to use .gnu.linkonce.r.foo.  */
      else if (DECL_COMDAT_GROUP (decl)
	       && strncmp (name, ".gnu.linkonce.t.", 16) == 0)
	{
	  size_t len = strlen (name) + 1;
	  char *rname = (char *) alloca (len);

	  memcpy (rname, name, len);
	  rname[14] = 'r';
	  return get_section (rname, SECTION_LINKONCE, decl);
	}
      /* For .text.foo we want to use .rodata.foo.  */
      else if (flag_function_sections && flag_data_sections
	       && strncmp (name, ".text.", 6) == 0)
	{
	  size_t len = strlen (name) + 1;
	  char *rname = (char *) alloca (len + 2);

	  memcpy (rname, ".rodata", 7);
	  memcpy (rname + 7, name + 5, len - 5);
	  return get_section (rname, 0, decl);
	}
    }

  return readonly_data_section;
}

/* Return the read-only data section associated with function DECL
   for targets where that section should be always the single
   readonly data section.  */

section *
default_no_function_rodata_section (tree decl ATTRIBUTE_UNUSED)
{
  return readonly_data_section;
}

/* A subroutine of mergeable_string_section and mergeable_constant_section.  */

static const char *
function_mergeable_rodata_prefix (void)
{
  section *s = targetm.asm_out.function_rodata_section (current_function_decl);
  if (SECTION_STYLE (s) == SECTION_NAMED)
    return s->named.name;
  else
    return targetm.asm_out.mergeable_rodata_prefix;
}

/* Return the section to use for string merging.  */

static section *
mergeable_string_section (tree decl ATTRIBUTE_UNUSED,
			  unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
			  unsigned int flags ATTRIBUTE_UNUSED)
{
  HOST_WIDE_INT len;

  if (HAVE_GAS_SHF_MERGE && flag_merge_constants
      && TREE_CODE (decl) == STRING_CST
      && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE
      && align <= 256
      && (len = int_size_in_bytes (TREE_TYPE (decl))) > 0
      && TREE_STRING_LENGTH (decl) >= len)
    {
      machine_mode mode;
      unsigned int modesize;
      const char *str;
      HOST_WIDE_INT i;
      int j, unit;
      const char *prefix = function_mergeable_rodata_prefix ();
      char *name = (char *) alloca (strlen (prefix) + 30);

      mode = TYPE_MODE (TREE_TYPE (TREE_TYPE (decl)));
      modesize = GET_MODE_BITSIZE (mode);
      if (modesize >= 8 && modesize <= 256
	  && (modesize & (modesize - 1)) == 0)
	{
	  if (align < modesize)
	    align = modesize;

	  str = TREE_STRING_POINTER (decl);
	  unit = GET_MODE_SIZE (mode);

	  /* Check for embedded NUL characters.  */
	  for (i = 0; i < len; i += unit)
	    {
	      for (j = 0; j < unit; j++)
		if (str[i + j] != '\0')
		  break;
	      if (j == unit)
		break;
	    }
	  if (i == len - unit)
	    {
	      sprintf (name, "%s.str%d.%d", prefix,
		       modesize / 8, (int) (align / 8));
	      flags |= (modesize / 8) | SECTION_MERGE | SECTION_STRINGS;
	      return get_section (name, flags, NULL);
	    }
	}
    }

  return readonly_data_section;
}

/* Return the section to use for constant merging.  */

section *
mergeable_constant_section (machine_mode mode ATTRIBUTE_UNUSED,
			    unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED,
			    unsigned int flags ATTRIBUTE_UNUSED)
{
  unsigned int modesize = GET_MODE_BITSIZE (mode);

  if (HAVE_GAS_SHF_MERGE && flag_merge_constants
      && mode != VOIDmode
      && mode != BLKmode
      && modesize <= align
      && align >= 8
      && align <= 256
      && (align & (align - 1)) == 0)
    {
      const char *prefix = function_mergeable_rodata_prefix ();
      char *name = (char *) alloca (strlen (prefix) + 30);

      sprintf (name, "%s.cst%d", prefix, (int) (align / 8));
      flags |= (align / 8) | SECTION_MERGE;
      return get_section (name, flags, NULL);
    }
  return readonly_data_section;
}

/* Given NAME, a putative register name, discard any customary prefixes.  */

static const char *
strip_reg_name (const char *name)
{
#ifdef REGISTER_PREFIX
  if (!strncmp (name, REGISTER_PREFIX, strlen (REGISTER_PREFIX)))
    name += strlen (REGISTER_PREFIX);
#endif
  if (name[0] == '%' || name[0] == '#')
    name++;
  return name;
}

/* The user has asked for a DECL to have a particular name.  Set (or
   change) it in such a way that we don't prefix an underscore to
   it.  */
void
set_user_assembler_name (tree decl, const char *name)
{
  char *starred = (char *) alloca (strlen (name) + 2);
  starred[0] = '*';
  strcpy (starred + 1, name);
  symtab->change_decl_assembler_name (decl, get_identifier (starred));
  SET_DECL_RTL (decl, NULL_RTX);
}

/* Decode an `asm' spec for a declaration as a register name.
   Return the register number, or -1 if nothing specified,
   or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
   or -3 if ASMSPEC is `cc' and is not recognized,
   or -4 if ASMSPEC is `memory' and is not recognized.
   Accept an exact spelling or a decimal number.
   Prefixes such as % are optional.  */

int
decode_reg_name_and_count (const char *asmspec, int *pnregs)
{
  /* Presume just one register is clobbered.  */
  *pnregs = 1;

  if (asmspec != 0)
    {
      int i;

      /* Get rid of confusing prefixes.  */
      asmspec = strip_reg_name (asmspec);

      /* Allow a decimal number as a "register name".  */
      for (i = strlen (asmspec) - 1; i >= 0; i--)
	if (! ISDIGIT (asmspec[i]))
	  break;
      if (asmspec[0] != 0 && i < 0)
	{
	  i = atoi (asmspec);
	  if (i < FIRST_PSEUDO_REGISTER && i >= 0 && reg_names[i][0])
	    return i;
	  else
	    return -2;
	}

      for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
	if (reg_names[i][0]
	    && ! strcmp (asmspec, strip_reg_name (reg_names[i])))
	  return i;

#ifdef OVERLAPPING_REGISTER_NAMES
      {
	static const struct
	{
	  const char *const name;
	  const int number;
	  const int nregs;
	} table[] = OVERLAPPING_REGISTER_NAMES;

	for (i = 0; i < (int) ARRAY_SIZE (table); i++)
	  if (table[i].name[0]
	      && ! strcmp (asmspec, table[i].name))
	    {
	      *pnregs = table[i].nregs;
	      return table[i].number;
	    }
      }
#endif /* OVERLAPPING_REGISTER_NAMES */

#ifdef ADDITIONAL_REGISTER_NAMES
      {
	static const struct { const char *const name; const int number; } table[]
	  = ADDITIONAL_REGISTER_NAMES;

	for (i = 0; i < (int) ARRAY_SIZE (table); i++)
	  if (table[i].name[0]
	      && ! strcmp (asmspec, table[i].name)
	      && reg_names[table[i].number][0])
	    return table[i].number;
      }
#endif /* ADDITIONAL_REGISTER_NAMES */

      if (!strcmp (asmspec, "memory"))
	return -4;

      if (!strcmp (asmspec, "cc"))
	return -3;

      return -2;
    }

  return -1;
}

int
decode_reg_name (const char *name)
{
  int count;
  return decode_reg_name_and_count (name, &count);
}


/* Return true if DECL's initializer is suitable for a BSS section.  */

bool
bss_initializer_p (const_tree decl)
{
  return (DECL_INITIAL (decl) == NULL
	  /* In LTO we have no errors in program; error_mark_node is used
	     to mark offlined constructors.  */
	  || (DECL_INITIAL (decl) == error_mark_node
	      && !in_lto_p)
	  || (flag_zero_initialized_in_bss
	      /* Leave constant zeroes in .rodata so they
		 can be shared.  */
	      && !TREE_READONLY (decl)
	      && initializer_zerop (DECL_INITIAL (decl))));
}

/* Compute the alignment of variable specified by DECL.
   DONT_OUTPUT_DATA is from assemble_variable.  */

void
align_variable (tree decl, bool dont_output_data)
{
  unsigned int align = DECL_ALIGN (decl);

  /* In the case for initialing an array whose length isn't specified,
     where we have not yet been able to do the layout,
     figure out the proper alignment now.  */
  if (dont_output_data && DECL_SIZE (decl) == 0
      && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
    align = MAX (align, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl))));

  /* Some object file formats have a maximum alignment which they support.
     In particular, a.out format supports a maximum alignment of 4.  */
  if (align > MAX_OFILE_ALIGNMENT)
    {
      error ("alignment of %q+D is greater than maximum object "
	     "file alignment %d", decl,
	     MAX_OFILE_ALIGNMENT/BITS_PER_UNIT);
      align = MAX_OFILE_ALIGNMENT;
    }

  if (! DECL_USER_ALIGN (decl))
    {
#ifdef DATA_ABI_ALIGNMENT
      unsigned int data_abi_align
	= DATA_ABI_ALIGNMENT (TREE_TYPE (decl), align);
      /* For backwards compatibility, don't assume the ABI alignment for
	 TLS variables.  */
      if (! DECL_THREAD_LOCAL_P (decl) || data_abi_align <= BITS_PER_WORD)
	align = data_abi_align;
#endif

      /* On some machines, it is good to increase alignment sometimes.
	 But as DECL_ALIGN is used both for actually emitting the variable
	 and for code accessing the variable as guaranteed alignment, we
	 can only increase the alignment if it is a performance optimization
	 if the references to it must bind to the current definition.  */
      if (decl_binds_to_current_def_p (decl)
	  && !DECL_VIRTUAL_P (decl))
	{
#ifdef DATA_ALIGNMENT
	  unsigned int data_align = DATA_ALIGNMENT (TREE_TYPE (decl), align);
	  /* Don't increase alignment too much for TLS variables - TLS space
	     is too precious.  */
	  if (! DECL_THREAD_LOCAL_P (decl) || data_align <= BITS_PER_WORD)
	    align = data_align;
#endif
	  if (DECL_INITIAL (decl) != 0
	      /* In LTO we have no errors in program; error_mark_node is used
		 to mark offlined constructors.  */
	      && (in_lto_p || DECL_INITIAL (decl) != error_mark_node))
	    {
	      unsigned int const_align
		= CONSTANT_ALIGNMENT (DECL_INITIAL (decl), align);
	      /* Don't increase alignment too much for TLS variables - TLS
		 space is too precious.  */
	      if (! DECL_THREAD_LOCAL_P (decl) || const_align <= BITS_PER_WORD)
		align = const_align;
	    }
	}
    }

  /* Reset the alignment in case we have made it tighter, so we can benefit
     from it in get_pointer_alignment.  */
  DECL_ALIGN (decl) = align;
}

/* Return DECL_ALIGN (decl), possibly increased for optimization purposes
   beyond what align_variable returned.  */

static unsigned int
get_variable_align (tree decl)
{
  unsigned int align = DECL_ALIGN (decl);

  /* For user aligned vars or static vars align_variable already did
     everything.  */
  if (DECL_USER_ALIGN (decl) || !TREE_PUBLIC (decl))
    return align;

#ifdef DATA_ABI_ALIGNMENT
  if (DECL_THREAD_LOCAL_P (decl))
    align = DATA_ABI_ALIGNMENT (TREE_TYPE (decl), align);
#endif

  /* For decls that bind to the current definition, align_variable
     did also everything, except for not assuming ABI required alignment
     of TLS variables.  For other vars, increase the alignment here
     as an optimization.  */
  if (!decl_binds_to_current_def_p (decl))
    {
      /* On some machines, it is good to increase alignment sometimes.  */
#ifdef DATA_ALIGNMENT
      unsigned int data_align = DATA_ALIGNMENT (TREE_TYPE (decl), align);
      /* Don't increase alignment too much for TLS variables - TLS space
         is too precious.  */
      if (! DECL_THREAD_LOCAL_P (decl) || data_align <= BITS_PER_WORD)
	align = data_align;
#endif
      if (DECL_INITIAL (decl) != 0
	  /* In LTO we have no errors in program; error_mark_node is used
	     to mark offlined constructors.  */
	  && (in_lto_p || DECL_INITIAL (decl) != error_mark_node))
	{
	  unsigned int const_align = CONSTANT_ALIGNMENT (DECL_INITIAL (decl),
							 align);
	  /* Don't increase alignment too much for TLS variables - TLS space
	     is too precious.  */
	  if (! DECL_THREAD_LOCAL_P (decl) || const_align <= BITS_PER_WORD)
	    align = const_align;
	}
    }

  return align;
}

/* Return the section into which the given VAR_DECL or CONST_DECL
   should be placed.  PREFER_NOSWITCH_P is true if a noswitch
   section should be used wherever possible.  */

section *
get_variable_section (tree decl, bool prefer_noswitch_p)
{
  addr_space_t as = ADDR_SPACE_GENERIC;
  int reloc;
  varpool_node *vnode = varpool_node::get (decl);
  if (vnode)
    {
      vnode = vnode->ultimate_alias_target ();
      decl = vnode->decl;
    }

  if (TREE_TYPE (decl) != error_mark_node)
    as = TYPE_ADDR_SPACE (TREE_TYPE (decl));

  /* We need the constructor to figure out reloc flag.  */
  if (vnode)
    vnode->get_constructor ();

  if (DECL_COMMON (decl))
    {
      /* If the decl has been given an explicit section name, or it resides
	 in a non-generic address space, then it isn't common, and shouldn't
	 be handled as such.  */
      gcc_assert (DECL_SECTION_NAME (decl) == NULL
		  && ADDR_SPACE_GENERIC_P (as));
      if (DECL_THREAD_LOCAL_P (decl))
	return tls_comm_section;
      else if (TREE_PUBLIC (decl) && bss_initializer_p (decl))
	return comm_section;
    }

  if (DECL_INITIAL (decl) == error_mark_node)
    reloc = contains_pointers_p (TREE_TYPE (decl)) ? 3 : 0;
  else if (DECL_INITIAL (decl))
    reloc = compute_reloc_for_constant (DECL_INITIAL (decl));
  else
    reloc = 0;

  resolve_unique_section (decl, reloc, flag_data_sections);
  if (IN_NAMED_SECTION (decl))
    return get_named_section (decl, NULL, reloc);

  if (ADDR_SPACE_GENERIC_P (as)
      && !DECL_THREAD_LOCAL_P (decl)
      && !(prefer_noswitch_p && targetm.have_switchable_bss_sections)
      && bss_initializer_p (decl))
    {
      if (!TREE_PUBLIC (decl)
	  && !((flag_sanitize & SANITIZE_ADDRESS)
	       && asan_protect_global (decl)))
	return lcomm_section;
      if (bss_noswitch_section)
	return bss_noswitch_section;
    }

  return targetm.asm_out.select_section (decl, reloc,
					 get_variable_align (decl));
}

/* Return the block into which object_block DECL should be placed.  */

static struct object_block *
get_block_for_decl (tree decl)
{
  section *sect;

  if (TREE_CODE (decl) == VAR_DECL)
    {
      /* The object must be defined in this translation unit.  */
      if (DECL_EXTERNAL (decl))
	return NULL;

      /* There's no point using object blocks for something that is
	 isolated by definition.  */
      if (DECL_COMDAT_GROUP (decl))
	return NULL;
    }

  /* We can only calculate block offsets if the decl has a known
     constant size.  */
  if (DECL_SIZE_UNIT (decl) == NULL)
    return NULL;
  if (!tree_fits_uhwi_p (DECL_SIZE_UNIT (decl)))
    return NULL;

  /* Find out which section should contain DECL.  We cannot put it into
     an object block if it requires a standalone definition.  */
  if (TREE_CODE (decl) == VAR_DECL)
      align_variable (decl, 0);
  sect = get_variable_section (decl, true);
  if (SECTION_STYLE (sect) == SECTION_NOSWITCH)
    return NULL;

  return get_block_for_section (sect);
}

/* Make sure block symbol SYMBOL is in block BLOCK.  */

static void
change_symbol_block (rtx symbol, struct object_block *block)
{
  if (block != SYMBOL_REF_BLOCK (symbol))
    {
      gcc_assert (SYMBOL_REF_BLOCK_OFFSET (symbol) < 0);
      SYMBOL_REF_BLOCK (symbol) = block;
    }
}

/* Return true if it is possible to put DECL in an object_block.  */

static bool
use_blocks_for_decl_p (tree decl)
{
  struct symtab_node *snode;

  /* Only data DECLs can be placed into object blocks.  */
  if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != CONST_DECL)
    return false;

  /* Detect decls created by dw2_force_const_mem.  Such decls are
     special because DECL_INITIAL doesn't specify the decl's true value.
     dw2_output_indirect_constants will instead call assemble_variable
     with dont_output_data set to 1 and then print the contents itself.  */
  if (DECL_INITIAL (decl) == decl)
    return false;

  /* If this decl is an alias, then we don't want to emit a
     definition.  */
  if (TREE_CODE (decl) == VAR_DECL
      && (snode = symtab_node::get (decl)) != NULL
      && snode->alias)
    return false;

  return targetm.use_blocks_for_decl_p (decl);
}

/* Follow the IDENTIFIER_TRANSPARENT_ALIAS chain starting at *ALIAS
   until we find an identifier that is not itself a transparent alias.
   Modify the alias passed to it by reference (and all aliases on the
   way to the ultimate target), such that they do not have to be
   followed again, and return the ultimate target of the alias
   chain.  */

static inline tree
ultimate_transparent_alias_target (tree *alias)
{
  tree target = *alias;

  if (IDENTIFIER_TRANSPARENT_ALIAS (target))
    {
      gcc_assert (TREE_CHAIN (target));
      target = ultimate_transparent_alias_target (&TREE_CHAIN (target));
      gcc_assert (! IDENTIFIER_TRANSPARENT_ALIAS (target)
		  && ! TREE_CHAIN (target));
      *alias = target;
    }

  return target;
}

/* Create the DECL_RTL for a VAR_DECL or FUNCTION_DECL.  DECL should
   have static storage duration.  In other words, it should not be an
   automatic variable, including PARM_DECLs.

   There is, however, one exception: this function handles variables
   explicitly placed in a particular register by the user.

   This is never called for PARM_DECL nodes.  */

void
make_decl_rtl (tree decl)
{
  const char *name = 0;
  int reg_number;
  tree id;
  rtx x;

  /* Check that we are not being given an automatic variable.  */
  gcc_assert (TREE_CODE (decl) != PARM_DECL
	      && TREE_CODE (decl) != RESULT_DECL);

  /* A weak alias has TREE_PUBLIC set but not the other bits.  */
  gcc_assert (TREE_CODE (decl) != VAR_DECL
	      || TREE_STATIC (decl)
	      || TREE_PUBLIC (decl)
	      || DECL_EXTERNAL (decl)
	      || DECL_REGISTER (decl));

  /* And that we were not given a type or a label.  */
  gcc_assert (TREE_CODE (decl) != TYPE_DECL
	      && TREE_CODE (decl) != LABEL_DECL);

  /* For a duplicate declaration, we can be called twice on the
     same DECL node.  Don't discard the RTL already made.  */
  if (DECL_RTL_SET_P (decl))
    {
      /* If the old RTL had the wrong mode, fix the mode.  */
      x = DECL_RTL (decl);
      if (GET_MODE (x) != DECL_MODE (decl))
	SET_DECL_RTL (decl, adjust_address_nv (x, DECL_MODE (decl), 0));

      if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
	return;

      /* ??? Another way to do this would be to maintain a hashed
	 table of such critters.  Instead of adding stuff to a DECL
	 to give certain attributes to it, we could use an external
	 hash map from DECL to set of attributes.  */

      /* Let the target reassign the RTL if it wants.
	 This is necessary, for example, when one machine specific
	 decl attribute overrides another.  */
      targetm.encode_section_info (decl, DECL_RTL (decl), false);

      /* If the symbol has a SYMBOL_REF_BLOCK field, update it based
	 on the new decl information.  */
      if (MEM_P (x)
	  && GET_CODE (XEXP (x, 0)) == SYMBOL_REF
	  && SYMBOL_REF_HAS_BLOCK_INFO_P (XEXP (x, 0)))
	change_symbol_block (XEXP (x, 0), get_block_for_decl (decl));

      return;
    }

  /* If this variable belongs to the global constant pool, retrieve the
     pre-computed RTL or recompute it in LTO mode.  */
  if (TREE_CODE (decl) == VAR_DECL && DECL_IN_CONSTANT_POOL (decl))
    {
      SET_DECL_RTL (decl, output_constant_def (DECL_INITIAL (decl), 1));
      return;
    }

  id = DECL_ASSEMBLER_NAME (decl);
  if (TREE_CODE (decl) == FUNCTION_DECL
      && cgraph_node::get (decl)
      && cgraph_node::get (decl)->instrumentation_clone)
    ultimate_transparent_alias_target (&id);
  name = IDENTIFIER_POINTER (id);

  if (name[0] != '*' && TREE_CODE (decl) != FUNCTION_DECL
      && DECL_REGISTER (decl))
    {
      error ("register name not specified for %q+D", decl);
    }
  else if (TREE_CODE (decl) != FUNCTION_DECL && DECL_REGISTER (decl))
    {
      const char *asmspec = name+1;
      machine_mode mode = DECL_MODE (decl);
      reg_number = decode_reg_name (asmspec);
      /* First detect errors in declaring global registers.  */
      if (reg_number == -1)
	error ("register name not specified for %q+D", decl);
      else if (reg_number < 0)
	error ("invalid register name for %q+D", decl);
      else if (mode == BLKmode)
	error ("data type of %q+D isn%'t suitable for a register",
	       decl);
      else if (!in_hard_reg_set_p (accessible_reg_set, mode, reg_number))
	error ("the register specified for %q+D cannot be accessed"
	       " by the current target", decl);
      else if (!in_hard_reg_set_p (operand_reg_set, mode, reg_number))
	error ("the register specified for %q+D is not general enough"
	       " to be used as a register variable", decl);
      else if (!HARD_REGNO_MODE_OK (reg_number, mode))
	error ("register specified for %q+D isn%'t suitable for data type",
               decl);
      /* Now handle properly declared static register variables.  */
      else
	{
	  int nregs;

	  if (DECL_INITIAL (decl) != 0 && TREE_STATIC (decl))
	    {
	      DECL_INITIAL (decl) = 0;
	      error ("global register variable has initial value");
	    }
	  if (TREE_THIS_VOLATILE (decl))
	    warning (OPT_Wvolatile_register_var,
		     "optimization may eliminate reads and/or "
		     "writes to register variables");

	  /* If the user specified one of the eliminables registers here,
	     e.g., FRAME_POINTER_REGNUM, we don't want to get this variable
	     confused with that register and be eliminated.  This usage is
	     somewhat suspect...  */

	  SET_DECL_RTL (decl, gen_raw_REG (mode, reg_number));
	  ORIGINAL_REGNO (DECL_RTL (decl)) = reg_number;
	  REG_USERVAR_P (DECL_RTL (decl)) = 1;

	  if (TREE_STATIC (decl))
	    {
	      /* Make this register global, so not usable for anything
		 else.  */
#ifdef ASM_DECLARE_REGISTER_GLOBAL
	      name = IDENTIFIER_POINTER (DECL_NAME (decl));
	      ASM_DECLARE_REGISTER_GLOBAL (asm_out_file, decl, reg_number, name);
#endif
	      nregs = hard_regno_nregs[reg_number][mode];
	      while (nregs > 0)
		globalize_reg (decl, reg_number + --nregs);
	    }

	  /* As a register variable, it has no section.  */
	  return;
	}
      /* Avoid internal errors from invalid register
	 specifications.  */
      SET_DECL_ASSEMBLER_NAME (decl, NULL_TREE);
      DECL_HARD_REGISTER (decl) = 0;
      return;
    }
  /* Now handle ordinary static variables and functions (in memory).
     Also handle vars declared register invalidly.  */
  else if (name[0] == '*')
  {
#ifdef REGISTER_PREFIX
    if (strlen (REGISTER_PREFIX) != 0)
      {
	reg_number = decode_reg_name (name);
	if (reg_number >= 0 || reg_number == -3)
	  error ("register name given for non-register variable %q+D", decl);
      }
#endif
  }

  /* Specifying a section attribute on a variable forces it into a
     non-.bss section, and thus it cannot be common.  */
  /* FIXME: In general this code should not be necessary because
     visibility pass is doing the same work.  But notice_global_symbol
     is called early and it needs to make DECL_RTL to get the name.
     we take care of recomputing the DECL_RTL after visibility is changed.  */
  if (TREE_CODE (decl) == VAR_DECL
      && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))
      && DECL_SECTION_NAME (decl) != NULL
      && DECL_INITIAL (decl) == NULL_TREE
      && DECL_COMMON (decl))
    DECL_COMMON (decl) = 0;

  /* Variables can't be both common and weak.  */
  if (TREE_CODE (decl) == VAR_DECL && DECL_WEAK (decl))
    DECL_COMMON (decl) = 0;

  if (use_object_blocks_p () && use_blocks_for_decl_p (decl))
    x = create_block_symbol (name, get_block_for_decl (decl), -1);
  else
    {
      machine_mode address_mode = Pmode;
      if (TREE_TYPE (decl) != error_mark_node)
	{
	  addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (decl));
	  address_mode = targetm.addr_space.address_mode (as);
	}
      x = gen_rtx_SYMBOL_REF (address_mode, name);
    }
  SYMBOL_REF_WEAK (x) = DECL_WEAK (decl);
  SET_SYMBOL_REF_DECL (x, decl);

  x = gen_rtx_MEM (DECL_MODE (decl), x);
  if (TREE_CODE (decl) != FUNCTION_DECL)
    set_mem_attributes (x, decl, 1);
  SET_DECL_RTL (decl, x);

  /* Optionally set flags or add text to the name to record information
     such as that it is a function name.
     If the name is changed, the macro ASM_OUTPUT_LABELREF
     will have to know how to strip this information.  */
  targetm.encode_section_info (decl, DECL_RTL (decl), true);
}

/* Like make_decl_rtl, but inhibit creation of new alias sets when
   calling make_decl_rtl.  Also, reset DECL_RTL before returning the
   rtl.  */

rtx
make_decl_rtl_for_debug (tree decl)
{
  unsigned int save_aliasing_flag;
  rtx rtl;

  if (DECL_RTL_SET_P (decl))
    return DECL_RTL (decl);

  /* Kludge alert!  Somewhere down the call chain, make_decl_rtl will
     call new_alias_set.  If running with -fcompare-debug, sometimes
     we do not want to create alias sets that will throw the alias
     numbers off in the comparison dumps.  So... clearing
     flag_strict_aliasing will keep new_alias_set() from creating a
     new set.  */
  save_aliasing_flag = flag_strict_aliasing;
  flag_strict_aliasing = 0;

  rtl = DECL_RTL (decl);
  /* Reset DECL_RTL back, as various parts of the compiler expects
     DECL_RTL set meaning it is actually going to be output.  */
  SET_DECL_RTL (decl, NULL);

  flag_strict_aliasing = save_aliasing_flag;
  return rtl;
}

/* Output a string of literal assembler code
   for an `asm' keyword used between functions.  */

void
assemble_asm (tree string)
{
  const char *p;
  app_enable ();

  if (TREE_CODE (string) == ADDR_EXPR)
    string = TREE_OPERAND (string, 0);

  p = TREE_STRING_POINTER (string);
  fprintf (asm_out_file, "%s%s\n", p[0] == '\t' ? "" : "\t", p);
}

/* Write the address of the entity given by SYMBOL to SEC.  */
void
assemble_addr_to_section (rtx symbol, section *sec)
{
  switch_to_section (sec);
  assemble_align (POINTER_SIZE);
  assemble_integer (symbol, POINTER_SIZE_UNITS, POINTER_SIZE, 1);
}

/* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
   not) section for PRIORITY.  */
section *
get_cdtor_priority_section (int priority, bool constructor_p)
{
  char buf[16];

  /* ??? This only works reliably with the GNU linker.  */
  sprintf (buf, "%s.%.5u",
	   constructor_p ? ".ctors" : ".dtors",
	   /* Invert the numbering so the linker puts us in the proper
	      order; constructors are run from right to left, and the
	      linker sorts in increasing order.  */
	   MAX_INIT_PRIORITY - priority);
  return get_section (buf, SECTION_WRITE, NULL);
}

void
default_named_section_asm_out_destructor (rtx symbol, int priority)
{
  section *sec;

  if (priority != DEFAULT_INIT_PRIORITY)
    sec = get_cdtor_priority_section (priority,
				      /*constructor_p=*/false);
  else
    sec = get_section (".dtors", SECTION_WRITE, NULL);

  assemble_addr_to_section (symbol, sec);
}

#ifdef DTORS_SECTION_ASM_OP
void
default_dtor_section_asm_out_destructor (rtx symbol,
					 int priority ATTRIBUTE_UNUSED)
{
  assemble_addr_to_section (symbol, dtors_section);
}
#endif

void
default_named_section_asm_out_constructor (rtx symbol, int priority)
{
  section *sec;

  if (priority != DEFAULT_INIT_PRIORITY)
    sec = get_cdtor_priority_section (priority,
				      /*constructor_p=*/true);
  else
    sec = get_section (".ctors", SECTION_WRITE, NULL);

  assemble_addr_to_section (symbol, sec);
}

#ifdef CTORS_SECTION_ASM_OP
void
default_ctor_section_asm_out_constructor (rtx symbol,
					  int priority ATTRIBUTE_UNUSED)
{
  assemble_addr_to_section (symbol, ctors_section);
}
#endif

/* CONSTANT_POOL_BEFORE_FUNCTION may be defined as an expression with
   a nonzero value if the constant pool should be output before the
   start of the function, or a zero value if the pool should output
   after the end of the function.  The default is to put it before the
   start.  */

#ifndef CONSTANT_POOL_BEFORE_FUNCTION
#define CONSTANT_POOL_BEFORE_FUNCTION 1
#endif

/* DECL is an object (either VAR_DECL or FUNCTION_DECL) which is going
   to be output to assembler.
   Set first_global_object_name and weak_global_object_name as appropriate.  */

void
notice_global_symbol (tree decl)
{
  const char **t = &first_global_object_name;

  if (first_global_object_name
      || !TREE_PUBLIC (decl)
      || DECL_EXTERNAL (decl)
      || !DECL_NAME (decl)
      || (TREE_CODE (decl) == VAR_DECL && DECL_HARD_REGISTER (decl))
      || (TREE_CODE (decl) != FUNCTION_DECL
	  && (TREE_CODE (decl) != VAR_DECL
	      || (DECL_COMMON (decl)
		  && (DECL_INITIAL (decl) == 0
		      || DECL_INITIAL (decl) == error_mark_node)))))
    return;

  /* We win when global object is found, but it is useful to know about weak
     symbol as well so we can produce nicer unique names.  */
  if (DECL_WEAK (decl) || DECL_ONE_ONLY (decl) || flag_shlib)
    t = &weak_global_object_name;

  if (!*t)
    {
      tree id = DECL_ASSEMBLER_NAME (decl);
      ultimate_transparent_alias_target (&id);
      *t = ggc_strdup (targetm.strip_name_encoding (IDENTIFIER_POINTER (id)));
    }
}

/* If not using flag_reorder_blocks_and_partition, decide early whether the
   current function goes into the cold section, so that targets can use
   current_function_section during RTL expansion.  DECL describes the
   function.  */

void
decide_function_section (tree decl)
{
  first_function_block_is_cold = false;

  if (flag_reorder_blocks_and_partition)
    /* We will decide in assemble_start_function.  */
    return;

 if (DECL_SECTION_NAME (decl))
    {
      struct cgraph_node *node = cgraph_node::get (current_function_decl);
      /* Calls to function_section rely on first_function_block_is_cold
	 being accurate.  */
      first_function_block_is_cold = (node
				      && node->frequency
				      == NODE_FREQUENCY_UNLIKELY_EXECUTED);
    }

  in_cold_section_p = first_function_block_is_cold;
}

/* Get the function's name, as described by its RTL.  This may be
   different from the DECL_NAME name used in the source file.  */
const char *
get_fnname_from_decl (tree decl)
{
  rtx x = DECL_RTL (decl);
  gcc_assert (MEM_P (x));
  x = XEXP (x, 0);
  gcc_assert (GET_CODE (x) == SYMBOL_REF);
  return XSTR (x, 0);
}

/* Output assembler code for the constant pool of a function and associated
   with defining the name of the function.  DECL describes the function.
   NAME is the function's name.  For the constant pool, we use the current
   constant pool data.  */

void
assemble_start_function (tree decl, const char *fnname)
{
  int align;
  char tmp_label[100];
  bool hot_label_written = false;

  if (flag_reorder_blocks_and_partition)
    {
      ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LHOTB", const_labelno);
      crtl->subsections.hot_section_label = ggc_strdup (tmp_label);
      ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LCOLDB", const_labelno);
      crtl->subsections.cold_section_label = ggc_strdup (tmp_label);
      ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LHOTE", const_labelno);
      crtl->subsections.hot_section_end_label = ggc_strdup (tmp_label);
      ASM_GENERATE_INTERNAL_LABEL (tmp_label, "LCOLDE", const_labelno);
      crtl->subsections.cold_section_end_label = ggc_strdup (tmp_label);
      const_labelno++;
      cold_function_name = NULL_TREE;
    }
  else
    {
      crtl->subsections.hot_section_label = NULL;
      crtl->subsections.cold_section_label = NULL;
      crtl->subsections.hot_section_end_label = NULL;
      crtl->subsections.cold_section_end_label = NULL;
    }

  /* The following code does not need preprocessing in the assembler.  */

  app_disable ();

  if (CONSTANT_POOL_BEFORE_FUNCTION)
    output_constant_pool (fnname, decl);

  align = symtab_node::get (decl)->definition_alignment ();

  /* Make sure the not and cold text (code) sections are properly
     aligned.  This is necessary here in the case where the function
     has both hot and cold sections, because we don't want to re-set
     the alignment when the section switch happens mid-function.  */

  if (flag_reorder_blocks_and_partition)
    {
      first_function_block_is_cold = false;

      switch_to_section (unlikely_text_section ());
      assemble_align (align);
      ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.cold_section_label);

      /* When the function starts with a cold section, we need to explicitly
	 align the hot section and write out the hot section label.
	 But if the current function is a thunk, we do not have a CFG.  */
      if (!cfun->is_thunk
	  && BB_PARTITION (ENTRY_BLOCK_PTR_FOR_FN (cfun)->next_bb) == BB_COLD_PARTITION)
	{
	  switch_to_section (text_section);
	  assemble_align (align);
	  ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.hot_section_label);
	  hot_label_written = true;
	  first_function_block_is_cold = true;
	}
      in_cold_section_p = first_function_block_is_cold;
    }


  /* Switch to the correct text section for the start of the function.  */

  switch_to_section (function_section (decl));
  if (flag_reorder_blocks_and_partition
      && !hot_label_written)
    ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.hot_section_label);

  /* Tell assembler to move to target machine's alignment for functions.  */
  align = floor_log2 (align / BITS_PER_UNIT);
  if (align > 0)
    {
      ASM_OUTPUT_ALIGN (asm_out_file, align);
    }

  /* Handle a user-specified function alignment.
     Note that we still need to align to DECL_ALIGN, as above,
     because ASM_OUTPUT_MAX_SKIP_ALIGN might not do any alignment at all.  */
  if (! DECL_USER_ALIGN (decl)
      && align_functions_log > align
      && optimize_function_for_speed_p (cfun))
    {
#ifdef ASM_OUTPUT_MAX_SKIP_ALIGN
      ASM_OUTPUT_MAX_SKIP_ALIGN (asm_out_file,
				 align_functions_log, align_functions - 1);
#else
      ASM_OUTPUT_ALIGN (asm_out_file, align_functions_log);
#endif
    }

#ifdef ASM_OUTPUT_FUNCTION_PREFIX
  ASM_OUTPUT_FUNCTION_PREFIX (asm_out_file, fnname);
#endif

  if (!DECL_IGNORED_P (decl))
    (*debug_hooks->begin_function) (decl);

  /* Make function name accessible from other files, if appropriate.  */

  if (TREE_PUBLIC (decl)
      || (cgraph_node::get (decl)->instrumentation_clone
	  && cgraph_node::get (decl)->instrumented_version
	  && TREE_PUBLIC (cgraph_node::get (decl)->instrumented_version->decl)))
    {
      notice_global_symbol (decl);

      globalize_decl (decl);

      maybe_assemble_visibility (decl);
    }

  if (DECL_PRESERVE_P (decl))
    targetm.asm_out.mark_decl_preserved (fnname);

  /* Do any machine/system dependent processing of the function name.  */
#ifdef ASM_DECLARE_FUNCTION_NAME
  ASM_DECLARE_FUNCTION_NAME (asm_out_file, fnname, current_function_decl);
#else
  /* Standard thing is just output label for the function.  */
  ASM_OUTPUT_FUNCTION_LABEL (asm_out_file, fnname, current_function_decl);
#endif /* ASM_DECLARE_FUNCTION_NAME */

  if (lookup_attribute ("no_split_stack", DECL_ATTRIBUTES (decl)))
    saw_no_split_stack = true;
}

/* Output assembler code associated with defining the size of the
   function.  DECL describes the function.  NAME is the function's name.  */

void
assemble_end_function (tree decl, const char *fnname ATTRIBUTE_UNUSED)
{
#ifdef ASM_DECLARE_FUNCTION_SIZE
  /* We could have switched section in the middle of the function.  */
  if (flag_reorder_blocks_and_partition)
    switch_to_section (function_section (decl));
  ASM_DECLARE_FUNCTION_SIZE (asm_out_file, fnname, decl);
#endif
  if (! CONSTANT_POOL_BEFORE_FUNCTION)
    {
      output_constant_pool (fnname, decl);
      switch_to_section (function_section (decl)); /* need to switch back */
    }
  /* Output labels for end of hot/cold text sections (to be used by
     debug info.)  */
  if (flag_reorder_blocks_and_partition)
    {
      section *save_text_section;

      save_text_section = in_section;
      switch_to_section (unlikely_text_section ());
#ifdef ASM_DECLARE_COLD_FUNCTION_SIZE
      if (cold_function_name != NULL_TREE)
	ASM_DECLARE_COLD_FUNCTION_SIZE (asm_out_file,
					IDENTIFIER_POINTER (cold_function_name),
					decl);
#endif
      ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.cold_section_end_label);
      if (first_function_block_is_cold)
	switch_to_section (text_section);
      else
	switch_to_section (function_section (decl));
      ASM_OUTPUT_LABEL (asm_out_file, crtl->subsections.hot_section_end_label);
      switch_to_section (save_text_section);
    }
}

/* Assemble code to leave SIZE bytes of zeros.  */

void
assemble_zeros (unsigned HOST_WIDE_INT size)
{
  /* Do no output if -fsyntax-only.  */
  if (flag_syntax_only)
    return;

#ifdef ASM_NO_SKIP_IN_TEXT
  /* The `space' pseudo in the text section outputs nop insns rather than 0s,
     so we must output 0s explicitly in the text section.  */
  if (ASM_NO_SKIP_IN_TEXT && (in_section->common.flags & SECTION_CODE) != 0)
    {
      unsigned HOST_WIDE_INT i;
      for (i = 0; i < size; i++)
	assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1);
    }
  else
#endif
    if (size > 0)
      ASM_OUTPUT_SKIP (asm_out_file, size);
}

/* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */

void
assemble_align (int align)
{
  if (align > BITS_PER_UNIT)
    {
      ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
    }
}

/* Assemble a string constant with the specified C string as contents.  */

void
assemble_string (const char *p, int size)
{
  int pos = 0;
  int maximum = 2000;

  /* If the string is very long, split it up.  */

  while (pos < size)
    {
      int thissize = size - pos;
      if (thissize > maximum)
	thissize = maximum;

      ASM_OUTPUT_ASCII (asm_out_file, p, thissize);

      pos += thissize;
      p += thissize;
    }
}


/* A noswitch_section_callback for lcomm_section.  */

static bool
emit_local (tree decl ATTRIBUTE_UNUSED,
	    const char *name ATTRIBUTE_UNUSED,
	    unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
	    unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
{
#if defined ASM_OUTPUT_ALIGNED_DECL_LOCAL
  unsigned int align = symtab_node::get (decl)->definition_alignment ();
  ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, decl, name,
				 size, align);
  return true;
#elif defined ASM_OUTPUT_ALIGNED_LOCAL
  unsigned int align = symtab_node::get (decl)->definition_alignment ();
  ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, align);
  return true;
#else
  ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded);
  return false;
#endif
}

/* A noswitch_section_callback for bss_noswitch_section.  */

#if defined ASM_OUTPUT_ALIGNED_BSS
static bool
emit_bss (tree decl ATTRIBUTE_UNUSED,
	  const char *name ATTRIBUTE_UNUSED,
	  unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
	  unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
{
  ASM_OUTPUT_ALIGNED_BSS (asm_out_file, decl, name, size,
			  get_variable_align (decl));
  return true;
}
#endif

/* A noswitch_section_callback for comm_section.  */

static bool
emit_common (tree decl ATTRIBUTE_UNUSED,
	     const char *name ATTRIBUTE_UNUSED,
	     unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
	     unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
{
#if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
  ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, decl, name,
				  size, get_variable_align (decl));
  return true;
#elif defined ASM_OUTPUT_ALIGNED_COMMON
  ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, name, size,
			     get_variable_align (decl));
  return true;
#else
  ASM_OUTPUT_COMMON (asm_out_file, name, size, rounded);
  return false;
#endif
}

/* A noswitch_section_callback for tls_comm_section.  */

static bool
emit_tls_common (tree decl ATTRIBUTE_UNUSED,
		 const char *name ATTRIBUTE_UNUSED,
		 unsigned HOST_WIDE_INT size ATTRIBUTE_UNUSED,
		 unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
{
#ifdef ASM_OUTPUT_TLS_COMMON
  ASM_OUTPUT_TLS_COMMON (asm_out_file, decl, name, size);
  return true;
#else
  sorry ("thread-local COMMON data not implemented");
  return true;
#endif
}

/* Assemble DECL given that it belongs in SECTION_NOSWITCH section SECT.
   NAME is the name of DECL's SYMBOL_REF.  */

static void
assemble_noswitch_variable (tree decl, const char *name, section *sect,
			    unsigned int align)
{
  unsigned HOST_WIDE_INT size, rounded;

  size = tree_to_uhwi (DECL_SIZE_UNIT (decl));
  rounded = size;

  if ((flag_sanitize & SANITIZE_ADDRESS) && asan_protect_global (decl))
    size += asan_red_zone_size (size);

  /* Don't allocate zero bytes of common,
     since that means "undefined external" in the linker.  */
  if (size == 0)
    rounded = 1;

  /* Round size up to multiple of BIGGEST_ALIGNMENT bits
     so that each uninitialized object starts on such a boundary.  */
  rounded += (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1;
  rounded = (rounded / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
	     * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));

  if (!sect->noswitch.callback (decl, name, size, rounded)
      && (unsigned HOST_WIDE_INT) (align / BITS_PER_UNIT) > rounded)
    error ("requested alignment for %q+D is greater than "
	   "implemented alignment of %wu", decl, rounded);
}

/* A subroutine of assemble_variable.  Output the label and contents of
   DECL, whose address is a SYMBOL_REF with name NAME.  DONT_OUTPUT_DATA
   is as for assemble_variable.  */

static void
assemble_variable_contents (tree decl, const char *name,
			    bool dont_output_data)
{
  /* Do any machine/system dependent processing of the object.  */
#ifdef ASM_DECLARE_OBJECT_NAME
  last_assemble_variable_decl = decl;
  ASM_DECLARE_OBJECT_NAME (asm_out_file, name, decl);
#else
  /* Standard thing is just output label for the object.  */
  ASM_OUTPUT_LABEL (asm_out_file, name);
#endif /* ASM_DECLARE_OBJECT_NAME */

  if (!dont_output_data)
    {
      /* Caller is supposed to use varpool_get_constructor when it wants
	 to output the body.  */
      gcc_assert (!in_lto_p || DECL_INITIAL (decl) != error_mark_node);
      if (DECL_INITIAL (decl)
	  && DECL_INITIAL (decl) != error_mark_node
	  && !initializer_zerop (DECL_INITIAL (decl)))
	/* Output the actual data.  */
	output_constant (DECL_INITIAL (decl),
			 tree_to_uhwi (DECL_SIZE_UNIT (decl)),
			 get_variable_align (decl),
			 false);
      else
	/* Leave space for it.  */
	assemble_zeros (tree_to_uhwi (DECL_SIZE_UNIT (decl)));
      targetm.asm_out.decl_end ();
    }
}

/* Write out assembly for the variable DECL, which is not defined in
   the current translation unit.  */
void
assemble_undefined_decl (tree decl)
{
  const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
  targetm.asm_out.assemble_undefined_decl (asm_out_file, name, decl);
}

/* Assemble everything that is needed for a variable or function declaration.
   Not used for automatic variables, and not used for function definitions.
   Should not be called for variables of incomplete structure type.

   TOP_LEVEL is nonzero if this variable has file scope.
   AT_END is nonzero if this is the special handling, at end of compilation,
   to define things that have had only tentative definitions.
   DONT_OUTPUT_DATA if nonzero means don't actually output the
   initial value (that will be done by the caller).  */

void
assemble_variable (tree decl, int top_level ATTRIBUTE_UNUSED,
		   int at_end ATTRIBUTE_UNUSED, int dont_output_data)
{
  const char *name;
  rtx decl_rtl, symbol;
  section *sect;
  unsigned int align;
  bool asan_protected = false;

  /* This function is supposed to handle VARIABLES.  Ensure we have one.  */
  gcc_assert (TREE_CODE (decl) == VAR_DECL);

  /* Emulated TLS had better not get this far.  */
  gcc_checking_assert (targetm.have_tls || !DECL_THREAD_LOCAL_P (decl));

  last_assemble_variable_decl = 0;

  /* Normally no need to say anything here for external references,
     since assemble_external is called by the language-specific code
     when a declaration is first seen.  */

  if (DECL_EXTERNAL (decl))
    return;

  /* Do nothing for global register variables.  */
  if (DECL_RTL_SET_P (decl) && REG_P (DECL_RTL (decl)))
    {
      TREE_ASM_WRITTEN (decl) = 1;
      return;
    }

  /* If type was incomplete when the variable was declared,
     see if it is complete now.  */

  if (DECL_SIZE (decl) == 0)
    layout_decl (decl, 0);

  /* Still incomplete => don't allocate it; treat the tentative defn
     (which is what it must have been) as an `extern' reference.  */

  if (!dont_output_data && DECL_SIZE (decl) == 0)
    {
      error ("storage size of %q+D isn%'t known", decl);
      TREE_ASM_WRITTEN (decl) = 1;
      return;
    }

  /* The first declaration of a variable that comes through this function
     decides whether it is global (in C, has external linkage)
     or local (in C, has internal linkage).  So do nothing more
     if this function has already run.  */

  if (TREE_ASM_WRITTEN (decl))
    return;

  /* Make sure targetm.encode_section_info is invoked before we set
     ASM_WRITTEN.  */
  decl_rtl = DECL_RTL (decl);

  TREE_ASM_WRITTEN (decl) = 1;

  /* Do no output if -fsyntax-only.  */
  if (flag_syntax_only)
    return;

  if (! dont_output_data
      && ! valid_constant_size_p (DECL_SIZE_UNIT (decl)))
    {
      error ("size of variable %q+D is too large", decl);
      return;
    }

  gcc_assert (MEM_P (decl_rtl));
  gcc_assert (GET_CODE (XEXP (decl_rtl, 0)) == SYMBOL_REF);
  symbol = XEXP (decl_rtl, 0);

  /* If this symbol belongs to the tree constant pool, output the constant
     if it hasn't already been written.  */
  if (TREE_CONSTANT_POOL_ADDRESS_P (symbol))
    {
      tree decl = SYMBOL_REF_DECL (symbol);
      if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl)))
	output_constant_def_contents (symbol);
      return;
    }

  app_disable ();

  name = XSTR (symbol, 0);
  if (TREE_PUBLIC (decl) && DECL_NAME (decl))
    notice_global_symbol (decl);

  /* Compute the alignment of this data.  */

  align_variable (decl, dont_output_data);

  if ((flag_sanitize & SANITIZE_ADDRESS)
      && asan_protect_global (decl))
    {
      asan_protected = true;
      DECL_ALIGN (decl) = MAX (DECL_ALIGN (decl), 
                               ASAN_RED_ZONE_SIZE * BITS_PER_UNIT);
    }

  set_mem_align (decl_rtl, DECL_ALIGN (decl));

  align = get_variable_align (decl);

  if (TREE_PUBLIC (decl))
    maybe_assemble_visibility (decl);

  if (DECL_PRESERVE_P (decl))
    targetm.asm_out.mark_decl_preserved (name);

  /* First make the assembler name(s) global if appropriate.  */
  sect = get_variable_section (decl, false);
  if (TREE_PUBLIC (decl)
      && (sect->common.flags & SECTION_COMMON) == 0)
    globalize_decl (decl);

  /* Output any data that we will need to use the address of.  */
  if (DECL_INITIAL (decl) && DECL_INITIAL (decl) != error_mark_node)
    output_addressed_constants (DECL_INITIAL (decl));

  /* dbxout.c needs to know this.  */
  if (sect && (sect->common.flags & SECTION_CODE) != 0)
    DECL_IN_TEXT_SECTION (decl) = 1;

  /* If the decl is part of an object_block, make sure that the decl
     has been positioned within its block, but do not write out its
     definition yet.  output_object_blocks will do that later.  */
  if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol) && SYMBOL_REF_BLOCK (symbol))
    {
      gcc_assert (!dont_output_data);
      place_block_symbol (symbol);
    }
  else if (SECTION_STYLE (sect) == SECTION_NOSWITCH)
    assemble_noswitch_variable (decl, name, sect, align);
  else
    {
      /* Special-case handling of vtv comdat sections.  */
      if (sect->named.name
	  && (strcmp (sect->named.name, ".vtable_map_vars") == 0))
	handle_vtv_comdat_section (sect, decl);
      else
	switch_to_section (sect);
      if (align > BITS_PER_UNIT)
	ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
      assemble_variable_contents (decl, name, dont_output_data);
      if (asan_protected)
	{
	  unsigned HOST_WIDE_INT int size
	    = tree_to_uhwi (DECL_SIZE_UNIT (decl));
	  assemble_zeros (asan_red_zone_size (size));
	}
    }
}


/* Given a function declaration (FN_DECL), this function assembles the
   function into the .preinit_array section.  */

void
assemble_vtv_preinit_initializer (tree fn_decl)
{
  section *sect;
  unsigned flags = SECTION_WRITE;
  rtx symbol = XEXP (DECL_RTL (fn_decl), 0);

  flags |= SECTION_NOTYPE;
  sect = get_section (".preinit_array", flags, fn_decl);
  switch_to_section (sect);
  assemble_addr_to_section (symbol, sect);
}

/* Return 1 if type TYPE contains any pointers.  */

static int
contains_pointers_p (tree type)
{
  switch (TREE_CODE (type))
    {
    case POINTER_TYPE:
    case REFERENCE_TYPE:
      /* I'm not sure whether OFFSET_TYPE needs this treatment,
	 so I'll play safe and return 1.  */
    case OFFSET_TYPE:
      return 1;

    case RECORD_TYPE:
    case UNION_TYPE:
    case QUAL_UNION_TYPE:
      {
	tree fields;
	/* For a type that has fields, see if the fields have pointers.  */
	for (fields = TYPE_FIELDS (type); fields; fields = DECL_CHAIN (fields))
	  if (TREE_CODE (fields) == FIELD_DECL
	      && contains_pointers_p (TREE_TYPE (fields)))
	    return 1;
	return 0;
      }

    case ARRAY_TYPE:
      /* An array type contains pointers if its element type does.  */
      return contains_pointers_p (TREE_TYPE (type));

    default:
      return 0;
    }
}

/* We delay assemble_external processing until
   the compilation unit is finalized.  This is the best we can do for
   right now (i.e. stage 3 of GCC 4.0) - the right thing is to delay
   it all the way to final.  See PR 17982 for further discussion.  */
static GTY(()) tree pending_assemble_externals;

#ifdef ASM_OUTPUT_EXTERNAL
/* Some targets delay some output to final using TARGET_ASM_FILE_END.
   As a result, assemble_external can be called after the list of externals
   is processed and the pointer set destroyed.  */
static bool pending_assemble_externals_processed;

/* Avoid O(external_decls**2) lookups in the pending_assemble_externals
   TREE_LIST in assemble_external.  */
static hash_set<tree> *pending_assemble_externals_set;

/* True if DECL is a function decl for which no out-of-line copy exists.
   It is assumed that DECL's assembler name has been set.  */

static bool
incorporeal_function_p (tree decl)
{
  if (TREE_CODE (decl) == FUNCTION_DECL && DECL_BUILT_IN (decl))
    {
      const char *name;

      if (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
	  && (DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA
	      || DECL_FUNCTION_CODE (decl) == BUILT_IN_ALLOCA_WITH_ALIGN))
	return true;

      name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
      /* Atomic or sync builtins which have survived this far will be
	 resolved externally and therefore are not incorporeal.  */
      if (strncmp (name, "__builtin_", 10) == 0)
	return true;
    }
  return false;
}

/* Actually do the tests to determine if this is necessary, and invoke
   ASM_OUTPUT_EXTERNAL.  */
static void
assemble_external_real (tree decl)
{
  rtx rtl = DECL_RTL (decl);

  if (MEM_P (rtl) && GET_CODE (XEXP (rtl, 0)) == SYMBOL_REF
      && !SYMBOL_REF_USED (XEXP (rtl, 0))
      && !incorporeal_function_p (decl))
    {
      /* Some systems do require some output.  */
      SYMBOL_REF_USED (XEXP (rtl, 0)) = 1;
      ASM_OUTPUT_EXTERNAL (asm_out_file, decl, XSTR (XEXP (rtl, 0), 0));
    }
}
#endif

void
process_pending_assemble_externals (void)
{
#ifdef ASM_OUTPUT_EXTERNAL
  tree list;
  for (list = pending_assemble_externals; list; list = TREE_CHAIN (list))
    assemble_external_real (TREE_VALUE (list));

  pending_assemble_externals = 0;
  pending_assemble_externals_processed = true;
  delete pending_assemble_externals_set;
#endif
}

/* This TREE_LIST contains any weak symbol declarations waiting
   to be emitted.  */
static GTY(()) tree weak_decls;

/* Output something to declare an external symbol to the assembler,
   and qualifiers such as weakness.  (Most assemblers don't need
   extern declaration, so we normally output nothing.)  Do nothing if
   DECL is not external.  */

void
assemble_external (tree decl ATTRIBUTE_UNUSED)
{
  /*  Make sure that the ASM_OUT_FILE is open.
      If it's not, we should not be calling this function.  */
  gcc_assert (asm_out_file);

  /* In a perfect world, the following condition would be true.
     Sadly, the Java and Go front ends emit assembly *from the front end*,
     bypassing the call graph.  See PR52739.  Fix before GCC 4.8.  */
#if 0
  /* This function should only be called if we are expanding, or have
     expanded, to RTL.
     Ideally, only final.c would be calling this function, but it is
     not clear whether that would break things somehow.  See PR 17982
     for further discussion.  */
  gcc_assert (state == EXPANSION
	      || state == FINISHED);
#endif

  if (!DECL_P (decl) || !DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl))
    return;

  /* We want to output annotation for weak and external symbols at
     very last to check if they are references or not.  */

  if (TARGET_SUPPORTS_WEAK
      && DECL_WEAK (decl)
      /* TREE_STATIC is a weird and abused creature which is not
	 generally the right test for whether an entity has been
	 locally emitted, inlined or otherwise not-really-extern, but
	 for declarations that can be weak, it happens to be
	 match.  */
      && !TREE_STATIC (decl)
      && lookup_attribute ("weak", DECL_ATTRIBUTES (decl))
      && value_member (decl, weak_decls) == NULL_TREE)
    weak_decls = tree_cons (NULL, decl, weak_decls);

#ifdef ASM_OUTPUT_EXTERNAL
  if (pending_assemble_externals_processed)
    {
      assemble_external_real (decl);
      return;
    }

  if (! pending_assemble_externals_set->add (decl))
    pending_assemble_externals = tree_cons (NULL, decl,
					    pending_assemble_externals);
#endif
}

/* Similar, for calling a library function FUN.  */

void
assemble_external_libcall (rtx fun)
{
  /* Declare library function name external when first used, if nec.  */
  if (! SYMBOL_REF_USED (fun))
    {
      SYMBOL_REF_USED (fun) = 1;
      targetm.asm_out.external_libcall (fun);
    }
}

/* Assemble a label named NAME.  */

void
assemble_label (FILE *file, const char *name)
{
  ASM_OUTPUT_LABEL (file, name);
}

/* Set the symbol_referenced flag for ID.  */
void
mark_referenced (tree id)
{
  TREE_SYMBOL_REFERENCED (id) = 1;
}

/* Set the symbol_referenced flag for DECL and notify callgraph.  */
void
mark_decl_referenced (tree decl)
{
  if (TREE_CODE (decl) == FUNCTION_DECL)
    {
      /* Extern inline functions don't become needed when referenced.
	 If we know a method will be emitted in other TU and no new
	 functions can be marked reachable, just use the external
	 definition.  */
      struct cgraph_node *node = cgraph_node::get_create (decl);
      if (!DECL_EXTERNAL (decl)
	  && !node->definition)
	node->mark_force_output ();
    }
  else if (TREE_CODE (decl) == VAR_DECL)
    {
      varpool_node *node = varpool_node::get_create (decl);
      /* C++ frontend use mark_decl_references to force COMDAT variables
         to be output that might appear dead otherwise.  */
      node->force_output = true;
    }
  /* else do nothing - we can get various sorts of CST nodes here,
     which do not need to be marked.  */
}


/* Output to FILE (an assembly file) a reference to NAME.  If NAME
   starts with a *, the rest of NAME is output verbatim.  Otherwise
   NAME is transformed in a target-specific way (usually by the
   addition of an underscore).  */

void
assemble_name_raw (FILE *file, const char *name)
{
  if (name[0] == '*')
    fputs (&name[1], file);
  else
    ASM_OUTPUT_LABELREF (file, name);
}

/* Like assemble_name_raw, but should be used when NAME might refer to
   an entity that is also represented as a tree (like a function or
   variable).  If NAME does refer to such an entity, that entity will
   be marked as referenced.  */

void
assemble_name (FILE *file, const char *name)
{
  const char *real_name;
  tree id;

  real_name = targetm.strip_name_encoding (name);

  id = maybe_get_identifier (real_name);
  if (id)
    {
      tree id_orig = id;

      mark_referenced (id);
      ultimate_transparent_alias_target (&id);
      if (id != id_orig)
	name = IDENTIFIER_POINTER (id);
      gcc_assert (! TREE_CHAIN (id));
    }

  assemble_name_raw (file, name);
}

/* Allocate SIZE bytes writable static space with a gensym name
   and return an RTX to refer to its address.  */

rtx
assemble_static_space (unsigned HOST_WIDE_INT size)
{
  char name[12];
  const char *namestring;
  rtx x;

  ASM_GENERATE_INTERNAL_LABEL (name, "LF", const_labelno);
  ++const_labelno;
  namestring = ggc_strdup (name);

  x = gen_rtx_SYMBOL_REF (Pmode, namestring);
  SYMBOL_REF_FLAGS (x) = SYMBOL_FLAG_LOCAL;

#ifdef ASM_OUTPUT_ALIGNED_DECL_LOCAL
  ASM_OUTPUT_ALIGNED_DECL_LOCAL (asm_out_file, NULL_TREE, name, size,
				 BIGGEST_ALIGNMENT);
#else
#ifdef ASM_OUTPUT_ALIGNED_LOCAL
  ASM_OUTPUT_ALIGNED_LOCAL (asm_out_file, name, size, BIGGEST_ALIGNMENT);
#else
  {
    /* Round size up to multiple of BIGGEST_ALIGNMENT bits
       so that each uninitialized object starts on such a boundary.  */
    /* Variable `rounded' might or might not be used in ASM_OUTPUT_LOCAL.  */
    unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED
      = ((size + (BIGGEST_ALIGNMENT / BITS_PER_UNIT) - 1)
	 / (BIGGEST_ALIGNMENT / BITS_PER_UNIT)
	 * (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
    ASM_OUTPUT_LOCAL (asm_out_file, name, size, rounded);
  }
#endif
#endif
  return x;
}

/* Assemble the static constant template for function entry trampolines.
   This is done at most once per compilation.
   Returns an RTX for the address of the template.  */

static GTY(()) rtx initial_trampoline;

rtx
assemble_trampoline_template (void)
{
  char label[256];
  const char *name;
  int align;
  rtx symbol;

  gcc_assert (targetm.asm_out.trampoline_template != NULL);

  if (initial_trampoline)
    return initial_trampoline;

  /* By default, put trampoline templates in read-only data section.  */

#ifdef TRAMPOLINE_SECTION
  switch_to_section (TRAMPOLINE_SECTION);
#else
  switch_to_section (readonly_data_section);
#endif

  /* Write the assembler code to define one.  */
  align = floor_log2 (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT);
  if (align > 0)
    ASM_OUTPUT_ALIGN (asm_out_file, align);

  targetm.asm_out.internal_label (asm_out_file, "LTRAMP", 0);
  targetm.asm_out.trampoline_template (asm_out_file);

  /* Record the rtl to refer to it.  */
  ASM_GENERATE_INTERNAL_LABEL (label, "LTRAMP", 0);
  name = ggc_strdup (label);
  symbol = gen_rtx_SYMBOL_REF (Pmode, name);
  SYMBOL_REF_FLAGS (symbol) = SYMBOL_FLAG_LOCAL;

  initial_trampoline = gen_const_mem (BLKmode, symbol);
  set_mem_align (initial_trampoline, TRAMPOLINE_ALIGNMENT);
  set_mem_size (initial_trampoline, TRAMPOLINE_SIZE);

  return initial_trampoline;
}

/* A and B are either alignments or offsets.  Return the minimum alignment
   that may be assumed after adding the two together.  */

static inline unsigned
min_align (unsigned int a, unsigned int b)
{
  return (a | b) & -(a | b);
}

/* Return the assembler directive for creating a given kind of integer
   object.  SIZE is the number of bytes in the object and ALIGNED_P
   indicates whether it is known to be aligned.  Return NULL if the
   assembly dialect has no such directive.

   The returned string should be printed at the start of a new line and
   be followed immediately by the object's initial value.  */

const char *
integer_asm_op (int size, int aligned_p)
{
  struct asm_int_op *ops;

  if (aligned_p)
    ops = &targetm.asm_out.aligned_op;
  else
    ops = &targetm.asm_out.unaligned_op;

  switch (size)
    {
    case 1:
      return targetm.asm_out.byte_op;
    case 2:
      return ops->hi;
    case 4:
      return ops->si;
    case 8:
      return ops->di;
    case 16:
      return ops->ti;
    default:
      return NULL;
    }
}

/* Use directive OP to assemble an integer object X.  Print OP at the
   start of the line, followed immediately by the value of X.  */

void
assemble_integer_with_op (const char *op, rtx x)
{
  fputs (op, asm_out_file);
  output_addr_const (asm_out_file, x);
  fputc ('\n', asm_out_file);
}

/* The default implementation of the asm_out.integer target hook.  */

bool
default_assemble_integer (rtx x ATTRIBUTE_UNUSED,
			  unsigned int size ATTRIBUTE_UNUSED,
			  int aligned_p ATTRIBUTE_UNUSED)
{
  const char *op = integer_asm_op (size, aligned_p);
  /* Avoid GAS bugs for large values.  Specifically negative values whose
     absolute value fits in a bfd_vma, but not in a bfd_signed_vma.  */
  if (size > UNITS_PER_WORD && size > POINTER_SIZE_UNITS)
    return false;
  return op && (assemble_integer_with_op (op, x), true);
}

/* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
   the alignment of the integer in bits.  Return 1 if we were able to output
   the constant, otherwise 0.  We must be able to output the constant,
   if FORCE is nonzero.  */

bool
assemble_integer (rtx x, unsigned int size, unsigned int align, int force)
{
  int aligned_p;

  aligned_p = (align >= MIN (size * BITS_PER_UNIT, BIGGEST_ALIGNMENT));

  /* See if the target hook can handle this kind of object.  */
  if (targetm.asm_out.integer (x, size, aligned_p))
    return true;

  /* If the object is a multi-byte one, try splitting it up.  Split
     it into words it if is multi-word, otherwise split it into bytes.  */
  if (size > 1)
    {
      machine_mode omode, imode;
      unsigned int subalign;
      unsigned int subsize, i;
      enum mode_class mclass;

      subsize = size > UNITS_PER_WORD? UNITS_PER_WORD : 1;
      subalign = MIN (align, subsize * BITS_PER_UNIT);
      if (GET_CODE (x) == CONST_FIXED)
	mclass = GET_MODE_CLASS (GET_MODE (x));
      else
	mclass = MODE_INT;

      omode = mode_for_size (subsize * BITS_PER_UNIT, mclass, 0);
      imode = mode_for_size (size * BITS_PER_UNIT, mclass, 0);

      for (i = 0; i < size; i += subsize)
	{
	  rtx partial = simplify_subreg (omode, x, imode, i);
	  if (!partial || !assemble_integer (partial, subsize, subalign, 0))
	    break;
	}
      if (i == size)
	return true;

      /* If we've printed some of it, but not all of it, there's no going
	 back now.  */
      gcc_assert (!i);
    }

  gcc_assert (!force);

  return false;
}

/* Assemble the floating-point constant D into an object of size MODE.  ALIGN
   is the alignment of the constant in bits.  If REVERSE is true, D is output
   in reverse storage order.  */

void
assemble_real (REAL_VALUE_TYPE d, machine_mode mode, unsigned int align,
	       bool reverse)
{
  long data[4] = {0, 0, 0, 0};
  int bitsize, nelts, nunits, units_per;
  rtx elt;

  /* This is hairy.  We have a quantity of known size.  real_to_target
     will put it into an array of *host* longs, 32 bits per element
     (even if long is more than 32 bits).  We need to determine the
     number of array elements that are occupied (nelts) and the number
     of *target* min-addressable units that will be occupied in the
     object file (nunits).  We cannot assume that 32 divides the
     mode's bitsize (size * BITS_PER_UNIT) evenly.

     size * BITS_PER_UNIT is used here to make sure that padding bits
     (which might appear at either end of the value; real_to_target
     will include the padding bits in its output array) are included.  */

  nunits = GET_MODE_SIZE (mode);
  bitsize = nunits * BITS_PER_UNIT;
  nelts = CEIL (bitsize, 32);
  units_per = 32 / BITS_PER_UNIT;

  real_to_target (data, &d, mode);

  /* Put out the first word with the specified alignment.  */
  if (reverse)
    elt = flip_storage_order (SImode, gen_int_mode (data[nelts - 1], SImode));
  else
    elt = GEN_INT (data[0]);
  assemble_integer (elt, MIN (nunits, units_per), align, 1);
  nunits -= units_per;

  /* Subsequent words need only 32-bit alignment.  */
  align = min_align (align, 32);

  for (int i = 1; i < nelts; i++)
    {
      if (reverse)
	elt = flip_storage_order (SImode,
				  gen_int_mode (data[nelts - 1 - i], SImode));
      else
	elt = GEN_INT (data[i]);
      assemble_integer (elt, MIN (nunits, units_per), align, 1);
      nunits -= units_per;
    }
}

/* Given an expression EXP with a constant value,
   reduce it to the sum of an assembler symbol and an integer.
   Store them both in the structure *VALUE.
   EXP must be reducible.  */

struct addr_const {
  rtx base;
  HOST_WIDE_INT offset;
};

static void
decode_addr_const (tree exp, struct addr_const *value)
{
  tree target = TREE_OPERAND (exp, 0);
  int offset = 0;
  rtx x;

  while (1)
    {
      if (TREE_CODE (target) == COMPONENT_REF
	  && tree_fits_shwi_p (byte_position (TREE_OPERAND (target, 1))))
	{
	  offset += int_byte_position (TREE_OPERAND (target, 1));
	  target = TREE_OPERAND (target, 0);
	}
      else if (TREE_CODE (target) == ARRAY_REF
	       || TREE_CODE (target) == ARRAY_RANGE_REF)
	{
	  offset += (tree_to_uhwi (TYPE_SIZE_UNIT (TREE_TYPE (target)))
		     * tree_to_shwi (TREE_OPERAND (target, 1)));
	  target = TREE_OPERAND (target, 0);
	}
      else if (TREE_CODE (target) == MEM_REF
	       && TREE_CODE (TREE_OPERAND (target, 0)) == ADDR_EXPR)
	{
	  offset += mem_ref_offset (target).to_short_addr ();
	  target = TREE_OPERAND (TREE_OPERAND (target, 0), 0);
	}
      else if (TREE_CODE (target) == INDIRECT_REF
	       && TREE_CODE (TREE_OPERAND (target, 0)) == NOP_EXPR
	       && TREE_CODE (TREE_OPERAND (TREE_OPERAND (target, 0), 0))
		  == ADDR_EXPR)
	target = TREE_OPERAND (TREE_OPERAND (TREE_OPERAND (target, 0), 0), 0);
      else
	break;
    }

  switch (TREE_CODE (target))
    {
    case VAR_DECL:
    case FUNCTION_DECL:
      x = DECL_RTL (target);
      break;

    case LABEL_DECL:
      x = gen_rtx_MEM (FUNCTION_MODE,
		       gen_rtx_LABEL_REF (Pmode, force_label_rtx (target)));
      break;

    case REAL_CST:
    case FIXED_CST:
    case STRING_CST:
    case COMPLEX_CST:
    case CONSTRUCTOR:
    case INTEGER_CST:
      x = output_constant_def (target, 1);
      break;

    default:
      gcc_unreachable ();
    }

  gcc_assert (MEM_P (x));
  x = XEXP (x, 0);

  value->base = x;
  value->offset = offset;
}

static GTY(()) hash_table<tree_descriptor_hasher> *const_desc_htab;

static void maybe_output_constant_def_contents (struct constant_descriptor_tree *, int);

/* Constant pool accessor function.  */

hash_table<tree_descriptor_hasher> *
constant_pool_htab (void)
{
  return const_desc_htab;
}

/* Compute a hash code for a constant expression.  */

hashval_t
tree_descriptor_hasher::hash (constant_descriptor_tree *ptr)
{
  return ptr->hash;
}

static hashval_t
const_hash_1 (const tree exp)
{
  const char *p;
  hashval_t hi;
  int len, i;
  enum tree_code code = TREE_CODE (exp);

  /* Either set P and LEN to the address and len of something to hash and
     exit the switch or return a value.  */

  switch (code)
    {
    case INTEGER_CST:
      p = (char *) &TREE_INT_CST_ELT (exp, 0);
      len = TREE_INT_CST_NUNITS (exp) * sizeof (HOST_WIDE_INT);
      break;

    case REAL_CST:
      return real_hash (TREE_REAL_CST_PTR (exp));

    case FIXED_CST:
      return fixed_hash (TREE_FIXED_CST_PTR (exp));

    case STRING_CST:
      p = TREE_STRING_POINTER (exp);
      len = TREE_STRING_LENGTH (exp);
      break;

    case COMPLEX_CST:
      return (const_hash_1 (TREE_REALPART (exp)) * 5
	      + const_hash_1 (TREE_IMAGPART (exp)));

    case VECTOR_CST:
      {
	unsigned i;

	hi = 7 + VECTOR_CST_NELTS (exp);

	for (i = 0; i < VECTOR_CST_NELTS (exp); ++i)
	  hi = hi * 563 + const_hash_1 (VECTOR_CST_ELT (exp, i));

	return hi;
      }

    case CONSTRUCTOR:
      {
	unsigned HOST_WIDE_INT idx;
	tree value;

	hi = 5 + int_size_in_bytes (TREE_TYPE (exp));

	FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, value)
	  if (value)
	    hi = hi * 603 + const_hash_1 (value);

	return hi;
      }

    case ADDR_EXPR:
    case FDESC_EXPR:
      {
	struct addr_const value;

	decode_addr_const (exp, &value);
	switch (GET_CODE (value.base))
	  {
	  case SYMBOL_REF:
	    /* Don't hash the address of the SYMBOL_REF;
	       only use the offset and the symbol name.  */
	    hi = value.offset;
	    p = XSTR (value.base, 0);
	    for (i = 0; p[i] != 0; i++)
	      hi = ((hi * 613) + (unsigned) (p[i]));
	    break;

	  case LABEL_REF:
	    hi = (value.offset
		  + CODE_LABEL_NUMBER (LABEL_REF_LABEL (value.base)) * 13);
	    break;

	  default:
	    gcc_unreachable ();
	  }
      }
      return hi;

    case PLUS_EXPR:
    case POINTER_PLUS_EXPR:
    case MINUS_EXPR:
      return (const_hash_1 (TREE_OPERAND (exp, 0)) * 9
	      + const_hash_1 (TREE_OPERAND (exp, 1)));

    CASE_CONVERT:
      return const_hash_1 (TREE_OPERAND (exp, 0)) * 7 + 2;

    default:
      /* A language specific constant. Just hash the code.  */
      return code;
    }

  /* Compute hashing function.  */
  hi = len;
  for (i = 0; i < len; i++)
    hi = ((hi * 613) + (unsigned) (p[i]));

  return hi;
}

/* Wrapper of compare_constant, for the htab interface.  */
bool
tree_descriptor_hasher::equal (constant_descriptor_tree *c1,
			       constant_descriptor_tree *c2)
{
  if (c1->hash != c2->hash)
    return 0;
  return compare_constant (c1->value, c2->value);
}

/* Compare t1 and t2, and return 1 only if they are known to result in
   the same bit pattern on output.  */

static int
compare_constant (const tree t1, const tree t2)
{
  enum tree_code typecode;

  if (t1 == NULL_TREE)
    return t2 == NULL_TREE;
  if (t2 == NULL_TREE)
    return 0;

  if (TREE_CODE (t1) != TREE_CODE (t2))
    return 0;

  switch (TREE_CODE (t1))
    {
    case INTEGER_CST:
      /* Integer constants are the same only if the same width of type.  */
      if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
	return 0;
      if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)))
	return 0;
      return tree_int_cst_equal (t1, t2);

    case REAL_CST:
      /* Real constants are the same only if the same width of type.  */
      if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
	return 0;

      return real_identical (&TREE_REAL_CST (t1), &TREE_REAL_CST (t2));

    case FIXED_CST:
      /* Fixed constants are the same only if the same width of type.  */
      if (TYPE_PRECISION (TREE_TYPE (t1)) != TYPE_PRECISION (TREE_TYPE (t2)))
	return 0;

      return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1), TREE_FIXED_CST (t2));

    case STRING_CST:
      if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2)))
	return 0;

      return (TREE_STRING_LENGTH (t1) == TREE_STRING_LENGTH (t2)
	      && ! memcmp (TREE_STRING_POINTER (t1), TREE_STRING_POINTER (t2),
			 TREE_STRING_LENGTH (t1)));

    case COMPLEX_CST:
      return (compare_constant (TREE_REALPART (t1), TREE_REALPART (t2))
	      && compare_constant (TREE_IMAGPART (t1), TREE_IMAGPART (t2)));

    case VECTOR_CST:
      {
	unsigned i;

        if (VECTOR_CST_NELTS (t1) != VECTOR_CST_NELTS (t2))
	  return 0;

	for (i = 0; i < VECTOR_CST_NELTS (t1); ++i)
	  if (!compare_constant (VECTOR_CST_ELT (t1, i),
				 VECTOR_CST_ELT (t2, i)))
	    return 0;

	return 1;
      }

    case CONSTRUCTOR:
      {
	vec<constructor_elt, va_gc> *v1, *v2;
	unsigned HOST_WIDE_INT idx;

	typecode = TREE_CODE (TREE_TYPE (t1));
	if (typecode != TREE_CODE (TREE_TYPE (t2)))
	  return 0;

	if (typecode == ARRAY_TYPE)
	  {
	    HOST_WIDE_INT size_1 = int_size_in_bytes (TREE_TYPE (t1));
	    /* For arrays, check that mode, size and storage order match.  */
	    if (TYPE_MODE (TREE_TYPE (t1)) != TYPE_MODE (TREE_TYPE (t2))
		|| size_1 == -1
		|| size_1 != int_size_in_bytes (TREE_TYPE (t2))
		|| TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (t1))
		   != TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (t2)))
	      return 0;
	  }
	else
	  {
	    /* For record and union constructors, require exact type
               equality.  */
	    if (TREE_TYPE (t1) != TREE_TYPE (t2))
	      return 0;
	  }

	v1 = CONSTRUCTOR_ELTS (t1);
	v2 = CONSTRUCTOR_ELTS (t2);
	if (vec_safe_length (v1) != vec_safe_length (v2))
	  return 0;

	for (idx = 0; idx < vec_safe_length (v1); ++idx)
	  {
	    constructor_elt *c1 = &(*v1)[idx];
	    constructor_elt *c2 = &(*v2)[idx];

	    /* Check that each value is the same...  */
	    if (!compare_constant (c1->value, c2->value))
	      return 0;
	    /* ... and that they apply to the same fields!  */
	    if (typecode == ARRAY_TYPE)
	      {
		if (!compare_constant (c1->index, c2->index))
		  return 0;
	      }
	    else
	      {
		if (c1->index != c2->index)
		  return 0;
	      }
	  }

	return 1;
      }

    case ADDR_EXPR:
    case FDESC_EXPR:
      {
	struct addr_const value1, value2;
	enum rtx_code code;
	int ret;

	decode_addr_const (t1, &value1);
	decode_addr_const (t2, &value2);

	if (value1.offset != value2.offset)
	  return 0;

	code = GET_CODE (value1.base);
	if (code != GET_CODE (value2.base))
	  return 0;

	switch (code)
	  {
	  case SYMBOL_REF:
	    ret = (strcmp (XSTR (value1.base, 0), XSTR (value2.base, 0)) == 0);
	    break;

	  case LABEL_REF:
	    ret = (CODE_LABEL_NUMBER (LABEL_REF_LABEL (value1.base))
	           == CODE_LABEL_NUMBER (LABEL_REF_LABEL (value2.base)));
	    break;

	  default:
	    gcc_unreachable ();
	  }
	return ret;
      }

    case PLUS_EXPR:
    case POINTER_PLUS_EXPR:
    case MINUS_EXPR:
    case RANGE_EXPR:
      return (compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0))
	      && compare_constant (TREE_OPERAND (t1, 1), TREE_OPERAND (t2, 1)));

    CASE_CONVERT:
    case VIEW_CONVERT_EXPR:
      return compare_constant (TREE_OPERAND (t1, 0), TREE_OPERAND (t2, 0));

    default:
      return 0;
    }

  gcc_unreachable ();
}

/* Return the section into which constant EXP should be placed.  */

static section *
get_constant_section (tree exp, unsigned int align)
{
  return targetm.asm_out.select_section (exp,
					 compute_reloc_for_constant (exp),
					 align);
}

/* Return the size of constant EXP in bytes.  */

static HOST_WIDE_INT
get_constant_size (tree exp)
{
  HOST_WIDE_INT size;

  size = int_size_in_bytes (TREE_TYPE (exp));
  if (TREE_CODE (exp) == STRING_CST)
    size = MAX (TREE_STRING_LENGTH (exp), size);
  return size;
}

/* Subroutine of output_constant_def:
   No constant equal to EXP is known to have been output.
   Make a constant descriptor to enter EXP in the hash table.
   Assign the label number and construct RTL to refer to the
   constant's location in memory.
   Caller is responsible for updating the hash table.  */

static struct constant_descriptor_tree *
build_constant_desc (tree exp)
{
  struct constant_descriptor_tree *desc;
  rtx symbol, rtl;
  char label[256];
  int labelno;
  tree decl;

  desc = ggc_alloc<constant_descriptor_tree> ();
  desc->value = exp;

  /* Create a string containing the label name, in LABEL.  */
  labelno = const_labelno++;
  ASM_GENERATE_INTERNAL_LABEL (label, "LC", labelno);

  /* Construct the VAR_DECL associated with the constant.  */
  decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, get_identifier (label),
		     TREE_TYPE (exp));
  DECL_ARTIFICIAL (decl) = 1;
  DECL_IGNORED_P (decl) = 1;
  TREE_READONLY (decl) = 1;
  TREE_STATIC (decl) = 1;
  TREE_ADDRESSABLE (decl) = 1;
  /* We don't set the RTL yet as this would cause varpool to assume that the
     variable is referenced.  Moreover, it would just be dropped in LTO mode.
     Instead we set the flag that will be recognized in make_decl_rtl.  */
  DECL_IN_CONSTANT_POOL (decl) = 1;
  DECL_INITIAL (decl) = desc->value;
  /* ??? CONSTANT_ALIGNMENT hasn't been updated for vector types on most
     architectures so use DATA_ALIGNMENT as well, except for strings.  */
  if (TREE_CODE (exp) == STRING_CST)
    {
      DECL_ALIGN (decl) = CONSTANT_ALIGNMENT (exp, DECL_ALIGN (decl));
    }
  else
    align_variable (decl, 0);

  /* Now construct the SYMBOL_REF and the MEM.  */
  if (use_object_blocks_p ())
    {
      int align = (TREE_CODE (decl) == CONST_DECL
		   || (TREE_CODE (decl) == VAR_DECL
		       && DECL_IN_CONSTANT_POOL (decl))
		   ? DECL_ALIGN (decl)
		   : symtab_node::get (decl)->definition_alignment ());
      section *sect = get_constant_section (exp, align);
      symbol = create_block_symbol (ggc_strdup (label),
				    get_block_for_section (sect), -1);
    }
  else
    symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
  SYMBOL_REF_FLAGS (symbol) |= SYMBOL_FLAG_LOCAL;
  SET_SYMBOL_REF_DECL (symbol, decl);
  TREE_CONSTANT_POOL_ADDRESS_P (symbol) = 1;

  rtl = gen_const_mem (TYPE_MODE (TREE_TYPE (exp)), symbol);
  set_mem_attributes (rtl, exp, 1);
  set_mem_alias_set (rtl, 0);

  /* We cannot share RTX'es in pool entries.
     Mark this piece of RTL as required for unsharing.  */
  RTX_FLAG (rtl, used) = 1;

  /* Set flags or add text to the name to record information, such as
     that it is a local symbol.  If the name is changed, the macro
     ASM_OUTPUT_LABELREF will have to know how to strip this
     information.  This call might invalidate our local variable
     SYMBOL; we can't use it afterward.  */
  targetm.encode_section_info (exp, rtl, true);

  desc->rtl = rtl;

  return desc;
}

/* Return an rtx representing a reference to constant data in memory
   for the constant expression EXP.

   If assembler code for such a constant has already been output,
   return an rtx to refer to it.
   Otherwise, output such a constant in memory
   and generate an rtx for it.

   If DEFER is nonzero, this constant can be deferred and output only
   if referenced in the function after all optimizations.

   `const_desc_table' records which constants already have label strings.  */

rtx
output_constant_def (tree exp, int defer)
{
  struct constant_descriptor_tree *desc;
  struct constant_descriptor_tree key;

  /* Look up EXP in the table of constant descriptors.  If we didn't find
     it, create a new one.  */
  key.value = exp;
  key.hash = const_hash_1 (exp);
  constant_descriptor_tree **loc
    = const_desc_htab->find_slot_with_hash (&key, key.hash, INSERT);

  desc = *loc;
  if (desc == 0)
    {
      desc = build_constant_desc (exp);
      desc->hash = key.hash;
      *loc = desc;
    }

  maybe_output_constant_def_contents (desc, defer);
  return desc->rtl;
}

/* Subroutine of output_constant_def: Decide whether or not we need to
   output the constant DESC now, and if so, do it.  */
static void
maybe_output_constant_def_contents (struct constant_descriptor_tree *desc,
				    int defer)
{
  rtx symbol = XEXP (desc->rtl, 0);
  tree exp = desc->value;

  if (flag_syntax_only)
    return;

  if (TREE_ASM_WRITTEN (exp))
    /* Already output; don't do it again.  */
    return;

  /* We can always defer constants as long as the context allows
     doing so.  */
  if (defer)
    {
      /* Increment n_deferred_constants if it exists.  It needs to be at
	 least as large as the number of constants actually referred to
	 by the function.  If it's too small we'll stop looking too early
	 and fail to emit constants; if it's too large we'll only look
	 through the entire function when we could have stopped earlier.  */
      if (cfun)
	n_deferred_constants++;
      return;
    }

  output_constant_def_contents (symbol);
}

/* Subroutine of output_constant_def_contents.  Output the definition
   of constant EXP, which is pointed to by label LABEL.  ALIGN is the
   constant's alignment in bits.  */

static void
assemble_constant_contents (tree exp, const char *label, unsigned int align)
{
  HOST_WIDE_INT size;

  size = get_constant_size (exp);

  /* Do any machine/system dependent processing of the constant.  */
  targetm.asm_out.declare_constant_name (asm_out_file, label, exp, size);

  /* Output the value of EXP.  */
  output_constant (exp, size, align, false);

  targetm.asm_out.decl_end ();
}

/* We must output the constant data referred to by SYMBOL; do so.  */

static void
output_constant_def_contents (rtx symbol)
{
  tree decl = SYMBOL_REF_DECL (symbol);
  tree exp = DECL_INITIAL (decl);
  bool asan_protected = false;

  /* Make sure any other constants whose addresses appear in EXP
     are assigned label numbers.  */
  output_addressed_constants (exp);

  /* We are no longer deferring this constant.  */
  TREE_ASM_WRITTEN (decl) = TREE_ASM_WRITTEN (exp) = 1;

  if ((flag_sanitize & SANITIZE_ADDRESS)
      && TREE_CODE (exp) == STRING_CST
      && asan_protect_global (exp))
    {
      asan_protected = true;
      DECL_ALIGN (decl) = MAX (DECL_ALIGN (decl),
			       ASAN_RED_ZONE_SIZE * BITS_PER_UNIT);
    }

  /* If the constant is part of an object block, make sure that the
     decl has been positioned within its block, but do not write out
     its definition yet.  output_object_blocks will do that later.  */
  if (SYMBOL_REF_HAS_BLOCK_INFO_P (symbol) && SYMBOL_REF_BLOCK (symbol))
    place_block_symbol (symbol);
  else
    {
      int align = (TREE_CODE (decl) == CONST_DECL
		   || (TREE_CODE (decl) == VAR_DECL
		       && DECL_IN_CONSTANT_POOL (decl))
		   ? DECL_ALIGN (decl)
		   : symtab_node::get (decl)->definition_alignment ());
      switch_to_section (get_constant_section (exp, align));
      if (align > BITS_PER_UNIT)
	ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (align / BITS_PER_UNIT));
      assemble_constant_contents (exp, XSTR (symbol, 0), align);
      if (asan_protected)
	{
	  HOST_WIDE_INT size = get_constant_size (exp);
	  assemble_zeros (asan_red_zone_size (size));
	}
    }
}

/* Look up EXP in the table of constant descriptors.  Return the rtl
   if it has been emitted, else null.  */

rtx
lookup_constant_def (tree exp)
{
  struct constant_descriptor_tree key;

  key.value = exp;
  key.hash = const_hash_1 (exp);
  constant_descriptor_tree *desc
    = const_desc_htab->find_with_hash (&key, key.hash);

  return (desc ? desc->rtl : NULL_RTX);
}

/* Return a tree representing a reference to constant data in memory
   for the constant expression EXP.

   This is the counterpart of output_constant_def at the Tree level.  */

tree
tree_output_constant_def (tree exp)
{
  struct constant_descriptor_tree *desc, key;
  tree decl;

  /* Look up EXP in the table of constant descriptors.  If we didn't find
     it, create a new one.  */
  key.value = exp;
  key.hash = const_hash_1 (exp);
  constant_descriptor_tree **loc
    = const_desc_htab->find_slot_with_hash (&key, key.hash, INSERT);

  desc = *loc;
  if (desc == 0)
    {
      desc = build_constant_desc (exp);
      desc->hash = key.hash;
      *loc = desc;
    }

  decl = SYMBOL_REF_DECL (XEXP (desc->rtl, 0));
  varpool_node::finalize_decl (decl);
  return decl;
}

struct GTY((chain_next ("%h.next"), for_user)) constant_descriptor_rtx {
  struct constant_descriptor_rtx *next;
  rtx mem;
  rtx sym;
  rtx constant;
  HOST_WIDE_INT offset;
  hashval_t hash;
  machine_mode mode;
  unsigned int align;
  int labelno;
  int mark;
};

struct const_rtx_desc_hasher : ggc_ptr_hash<constant_descriptor_rtx>
{
  static hashval_t hash (constant_descriptor_rtx *);
  static bool equal (constant_descriptor_rtx *, constant_descriptor_rtx *);
};

/* Used in the hash tables to avoid outputting the same constant
   twice.  Unlike 'struct constant_descriptor_tree', RTX constants
   are output once per function, not once per file.  */
/* ??? Only a few targets need per-function constant pools.  Most
   can use one per-file pool.  Should add a targetm bit to tell the
   difference.  */

struct GTY(()) rtx_constant_pool {
  /* Pointers to first and last constant in pool, as ordered by offset.  */
  struct constant_descriptor_rtx *first;
  struct constant_descriptor_rtx *last;

  /* Hash facility for making memory-constants from constant rtl-expressions.
     It is used on RISC machines where immediate integer arguments and
     constant addresses are restricted so that such constants must be stored
     in memory.  */
  hash_table<const_rtx_desc_hasher> *const_rtx_htab;

  /* Current offset in constant pool (does not include any
     machine-specific header).  */
  HOST_WIDE_INT offset;
};

/* Hash and compare functions for const_rtx_htab.  */

hashval_t
const_rtx_desc_hasher::hash (constant_descriptor_rtx *desc)
{
  return desc->hash;
}

bool
const_rtx_desc_hasher::equal (constant_descriptor_rtx *x,
			      constant_descriptor_rtx *y)
{
  if (x->mode != y->mode)
    return 0;
  return rtx_equal_p (x->constant, y->constant);
}

/* Hash one component of a constant.  */

static hashval_t
const_rtx_hash_1 (const_rtx x)
{
  unsigned HOST_WIDE_INT hwi;
  machine_mode mode;
  enum rtx_code code;
  hashval_t h;
  int i;

  code = GET_CODE (x);
  mode = GET_MODE (x);
  h = (hashval_t) code * 1048573 + mode;

  switch (code)
    {
    case CONST_INT:
      hwi = INTVAL (x);

    fold_hwi:
      {
	int shift = sizeof (hashval_t) * CHAR_BIT;
	const int n = sizeof (HOST_WIDE_INT) / sizeof (hashval_t);

	h ^= (hashval_t) hwi;
	for (i = 1; i < n; ++i)
	  {
	    hwi >>= shift;
	    h ^= (hashval_t) hwi;
	  }
      }
      break;

    case CONST_WIDE_INT:
      hwi = GET_MODE_PRECISION (mode);
      {
	for (i = 0; i < CONST_WIDE_INT_NUNITS (x); i++)
	  hwi ^= CONST_WIDE_INT_ELT (x, i);
	goto fold_hwi;
      }

    case CONST_DOUBLE:
      if (TARGET_SUPPORTS_WIDE_INT == 0 && mode == VOIDmode)
	{
	  hwi = CONST_DOUBLE_LOW (x) ^ CONST_DOUBLE_HIGH (x);
	  goto fold_hwi;
	}
      else
	h ^= real_hash (CONST_DOUBLE_REAL_VALUE (x));
      break;

    case CONST_FIXED:
      h ^= fixed_hash (CONST_FIXED_VALUE (x));
      break;

    case SYMBOL_REF:
      h ^= htab_hash_string (XSTR (x, 0));
      break;

    case LABEL_REF:
      h = h * 251 + CODE_LABEL_NUMBER (LABEL_REF_LABEL (x));
      break;

    case UNSPEC:
    case UNSPEC_VOLATILE:
      h = h * 251 + XINT (x, 1);
      break;

    default:
      break;
    }

  return h;
}

/* Compute a hash value for X, which should be a constant.  */

static hashval_t
const_rtx_hash (rtx x)
{
  hashval_t h = 0;
  subrtx_iterator::array_type array;
  FOR_EACH_SUBRTX (iter, array, x, ALL)
    h = h * 509 + const_rtx_hash_1 (*iter);
  return h;
}


/* Create and return a new rtx constant pool.  */

static struct rtx_constant_pool *
create_constant_pool (void)
{
  struct rtx_constant_pool *pool;

  pool = ggc_alloc<rtx_constant_pool> ();
  pool->const_rtx_htab = hash_table<const_rtx_desc_hasher>::create_ggc (31);
  pool->first = NULL;
  pool->last = NULL;
  pool->offset = 0;
  return pool;
}

/* Initialize constant pool hashing for a new function.  */

void
init_varasm_status (void)
{
  crtl->varasm.pool = create_constant_pool ();
  crtl->varasm.deferred_constants = 0;
}

/* Given a MINUS expression, simplify it if both sides
   include the same symbol.  */

rtx
simplify_subtraction (rtx x)
{
  rtx r = simplify_rtx (x);
  return r ? r : x;
}

/* Given a constant rtx X, make (or find) a memory constant for its value
   and return a MEM rtx to refer to it in memory.  */

rtx
force_const_mem (machine_mode mode, rtx x)
{
  struct constant_descriptor_rtx *desc, tmp;
  struct rtx_constant_pool *pool;
  char label[256];
  rtx def, symbol;
  hashval_t hash;
  unsigned int align;
  constant_descriptor_rtx **slot;

  /* If we're not allowed to drop X into the constant pool, don't.  */
  if (targetm.cannot_force_const_mem (mode, x))
    return NULL_RTX;

  /* Record that this function has used a constant pool entry.  */
  crtl->uses_const_pool = 1;

  /* Decide which pool to use.  */
  pool = (targetm.use_blocks_for_constant_p (mode, x)
	  ? shared_constant_pool
	  : crtl->varasm.pool);

  /* Lookup the value in the hashtable.  */
  tmp.constant = x;
  tmp.mode = mode;
  hash = const_rtx_hash (x);
  slot = pool->const_rtx_htab->find_slot_with_hash (&tmp, hash, INSERT);
  desc = *slot;

  /* If the constant was already present, return its memory.  */
  if (desc)
    return copy_rtx (desc->mem);

  /* Otherwise, create a new descriptor.  */
  desc = ggc_alloc<constant_descriptor_rtx> ();
  *slot = desc;

  /* Align the location counter as required by EXP's data type.  */
  align = GET_MODE_ALIGNMENT (mode == VOIDmode ? word_mode : mode);

  tree type = lang_hooks.types.type_for_mode (mode, 0);
  if (type != NULL_TREE)
    align = CONSTANT_ALIGNMENT (make_tree (type, x), align);

  pool->offset += (align / BITS_PER_UNIT) - 1;
  pool->offset &= ~ ((align / BITS_PER_UNIT) - 1);

  desc->next = NULL;
  desc->constant = copy_rtx (tmp.constant);
  desc->offset = pool->offset;
  desc->hash = hash;
  desc->mode = mode;
  desc->align = align;
  desc->labelno = const_labelno;
  desc->mark = 0;

  pool->offset += GET_MODE_SIZE (mode);
  if (pool->last)
    pool->last->next = desc;
  else
    pool->first = pool->last = desc;
  pool->last = desc;

  /* Create a string containing the label name, in LABEL.  */
  ASM_GENERATE_INTERNAL_LABEL (label, "LC", const_labelno);
  ++const_labelno;

  /* Construct the SYMBOL_REF.  Make sure to mark it as belonging to
     the constants pool.  */
  if (use_object_blocks_p () && targetm.use_blocks_for_constant_p (mode, x))
    {
      section *sect = targetm.asm_out.select_rtx_section (mode, x, align);
      symbol = create_block_symbol (ggc_strdup (label),
				    get_block_for_section (sect), -1);
    }
  else
    symbol = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (label));
  desc->sym = symbol;
  SYMBOL_REF_FLAGS (symbol) |= SYMBOL_FLAG_LOCAL;
  CONSTANT_POOL_ADDRESS_P (symbol) = 1;
  SET_SYMBOL_REF_CONSTANT (symbol, desc);

  /* Construct the MEM.  */
  desc->mem = def = gen_const_mem (mode, symbol);
  set_mem_attributes (def, lang_hooks.types.type_for_mode (mode, 0), 1);
  set_mem_align (def, align);

  /* If we're dropping a label to the constant pool, make sure we
     don't delete it.  */
  if (GET_CODE (x) == LABEL_REF)
    LABEL_PRESERVE_P (XEXP (x, 0)) = 1;

  return copy_rtx (def);
}

/* Given a constant pool SYMBOL_REF, return the corresponding constant.  */

rtx
get_pool_constant (const_rtx addr)
{
  return SYMBOL_REF_CONSTANT (addr)->constant;
}

/* Given a constant pool SYMBOL_REF, return the corresponding constant
   and whether it has been output or not.  */

rtx
get_pool_constant_mark (rtx addr, bool *pmarked)
{
  struct constant_descriptor_rtx *desc;

  desc = SYMBOL_REF_CONSTANT (addr);
  *pmarked = (desc->mark != 0);
  return desc->constant;
}

/* Similar, return the mode.  */

machine_mode
get_pool_mode (const_rtx addr)
{
  return SYMBOL_REF_CONSTANT (addr)->mode;
}

/* Return the size of the constant pool.  */

int
get_pool_size (void)
{
  return crtl->varasm.pool->offset;
}

/* Worker function for output_constant_pool_1.  Emit assembly for X
   in MODE with known alignment ALIGN.  */

static void
output_constant_pool_2 (machine_mode mode, rtx x, unsigned int align)
{
  switch (GET_MODE_CLASS (mode))
    {
    case MODE_FLOAT:
    case MODE_DECIMAL_FLOAT:
      {
	gcc_assert (CONST_DOUBLE_AS_FLOAT_P (x));
	assemble_real (*CONST_DOUBLE_REAL_VALUE (x), mode, align, false);
	break;
      }

    case MODE_INT:
    case MODE_PARTIAL_INT:
    case MODE_FRACT:
    case MODE_UFRACT:
    case MODE_ACCUM:
    case MODE_UACCUM:
    case MODE_POINTER_BOUNDS:
      assemble_integer (x, GET_MODE_SIZE (mode), align, 1);
      break;

    case MODE_VECTOR_FLOAT:
    case MODE_VECTOR_INT:
    case MODE_VECTOR_FRACT:
    case MODE_VECTOR_UFRACT:
    case MODE_VECTOR_ACCUM:
    case MODE_VECTOR_UACCUM:
      {
	int i, units;
        machine_mode submode = GET_MODE_INNER (mode);
	unsigned int subalign = MIN (align, GET_MODE_BITSIZE (submode));

	gcc_assert (GET_CODE (x) == CONST_VECTOR);
	units = CONST_VECTOR_NUNITS (x);

	for (i = 0; i < units; i++)
	  {
	    rtx elt = CONST_VECTOR_ELT (x, i);
	    output_constant_pool_2 (submode, elt, i ? subalign : align);
	  }
      }
      break;

    default:
      gcc_unreachable ();
    }
}

/* Worker function for output_constant_pool.  Emit constant DESC,
   giving it ALIGN bits of alignment.  */

static void
output_constant_pool_1 (struct constant_descriptor_rtx *desc,
			unsigned int align)
{
  rtx x, tmp;

  x = desc->constant;

  /* See if X is a LABEL_REF (or a CONST referring to a LABEL_REF)
     whose CODE_LABEL has been deleted.  This can occur if a jump table
     is eliminated by optimization.  If so, write a constant of zero
     instead.  Note that this can also happen by turning the
     CODE_LABEL into a NOTE.  */
  /* ??? This seems completely and utterly wrong.  Certainly it's
     not true for NOTE_INSN_DELETED_LABEL, but I disbelieve proper
     functioning even with rtx_insn::deleted and friends.  */

  tmp = x;
  switch (GET_CODE (tmp))
    {
    case CONST:
      if (GET_CODE (XEXP (tmp, 0)) != PLUS
	  || GET_CODE (XEXP (XEXP (tmp, 0), 0)) != LABEL_REF)
	break;
      tmp = XEXP (XEXP (tmp, 0), 0);
      /* FALLTHRU  */

    case LABEL_REF:
      tmp = LABEL_REF_LABEL (tmp);
      gcc_assert (!as_a<rtx_insn *> (tmp)->deleted ());
      gcc_assert (!NOTE_P (tmp)
		  || NOTE_KIND (tmp) != NOTE_INSN_DELETED);
      break;

    default:
      break;
    }

#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
  ASM_OUTPUT_SPECIAL_POOL_ENTRY (asm_out_file, x, desc->mode,
				 align, desc->labelno, done);
#endif

  assemble_align (align);

  /* Output the label.  */
  targetm.asm_out.internal_label (asm_out_file, "LC", desc->labelno);

  /* Output the data.
     Pass actual alignment value while emitting string constant to asm code
     as function 'output_constant_pool_1' explicitly passes the alignment as 1
     assuming that the data is already aligned which prevents the generation 
     of fix-up table entries.  */
  output_constant_pool_2 (desc->mode, x, desc->align);

  /* Make sure all constants in SECTION_MERGE and not SECTION_STRINGS
     sections have proper size.  */
  if (align > GET_MODE_BITSIZE (desc->mode)
      && in_section
      && (in_section->common.flags & SECTION_MERGE))
    assemble_align (align);

#ifdef ASM_OUTPUT_SPECIAL_POOL_ENTRY
 done:
#endif
  return;
}

/* Mark all constants that are referenced by SYMBOL_REFs in X.
   Emit referenced deferred strings.  */

static void
mark_constants_in_pattern (rtx insn)
{
  subrtx_iterator::array_type array;
  FOR_EACH_SUBRTX (iter, array, PATTERN (insn), ALL)
    {
      const_rtx x = *iter;
      if (GET_CODE (x) == SYMBOL_REF)
	{
	  if (CONSTANT_POOL_ADDRESS_P (x))
	    {
	      struct constant_descriptor_rtx *desc = SYMBOL_REF_CONSTANT (x);
	      if (desc->mark == 0)
		{
		  desc->mark = 1;
		  iter.substitute (desc->constant);
		}
	    }
	  else if (TREE_CONSTANT_POOL_ADDRESS_P (x))
	    {
	      tree decl = SYMBOL_REF_DECL (x);
	      if (!TREE_ASM_WRITTEN (DECL_INITIAL (decl)))
		{
		  n_deferred_constants--;
		  output_constant_def_contents (CONST_CAST_RTX (x));
		}
	    }
	}
    }
}

/* Look through appropriate parts of INSN, marking all entries in the
   constant pool which are actually being used.  Entries that are only
   referenced by other constants are also marked as used.  Emit
   deferred strings that are used.  */

static void
mark_constants (rtx_insn *insn)
{
  if (!INSN_P (insn))
    return;

  /* Insns may appear inside a SEQUENCE.  Only check the patterns of
     insns, not any notes that may be attached.  We don't want to mark
     a constant just because it happens to appear in a REG_EQUIV note.  */
  if (rtx_sequence *seq = dyn_cast <rtx_sequence *> (PATTERN (insn)))
    {
      int i, n = seq->len ();
      for (i = 0; i < n; ++i)
	{
	  rtx subinsn = seq->element (i);
	  if (INSN_P (subinsn))
	    mark_constants_in_pattern (subinsn);
	}
    }
  else
    mark_constants_in_pattern (insn);
}

/* Look through the instructions for this function, and mark all the
   entries in POOL which are actually being used.  Emit deferred constants
   which have indeed been used.  */

static void
mark_constant_pool (void)
{
  rtx_insn *insn;

  if (!crtl->uses_const_pool && n_deferred_constants == 0)
    return;

  for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
    mark_constants (insn);
}

/* Write all the constants in POOL.  */

static void
output_constant_pool_contents (struct rtx_constant_pool *pool)
{
  struct constant_descriptor_rtx *desc;

  for (desc = pool->first; desc ; desc = desc->next)
    if (desc->mark)
      {
	/* If the constant is part of an object_block, make sure that
	   the constant has been positioned within its block, but do not
	   write out its definition yet.  output_object_blocks will do
	   that later.  */
	if (SYMBOL_REF_HAS_BLOCK_INFO_P (desc->sym)
	    && SYMBOL_REF_BLOCK (desc->sym))
	  place_block_symbol (desc->sym);
	else
	  {
	    switch_to_section (targetm.asm_out.select_rtx_section
			       (desc->mode, desc->constant, desc->align));
	    output_constant_pool_1 (desc, desc->align);
	  }
      }
}

/* Mark all constants that are used in the current function, then write
   out the function's private constant pool.  */

static void
output_constant_pool (const char *fnname ATTRIBUTE_UNUSED,
		      tree fndecl ATTRIBUTE_UNUSED)
{
  struct rtx_constant_pool *pool = crtl->varasm.pool;

  /* It is possible for gcc to call force_const_mem and then to later
     discard the instructions which refer to the constant.  In such a
     case we do not need to output the constant.  */
  mark_constant_pool ();

#ifdef ASM_OUTPUT_POOL_PROLOGUE
  ASM_OUTPUT_POOL_PROLOGUE (asm_out_file, fnname, fndecl, pool->offset);
#endif

  output_constant_pool_contents (pool);

#ifdef ASM_OUTPUT_POOL_EPILOGUE
  ASM_OUTPUT_POOL_EPILOGUE (asm_out_file, fnname, fndecl, pool->offset);
#endif
}

/* Write the contents of the shared constant pool.  */

void
output_shared_constant_pool (void)
{
  output_constant_pool_contents (shared_constant_pool);
}

/* Determine what kind of relocations EXP may need.  */

int
compute_reloc_for_constant (tree exp)
{
  int reloc = 0, reloc2;
  tree tem;

  switch (TREE_CODE (exp))
    {
    case ADDR_EXPR:
    case FDESC_EXPR:
      /* Go inside any operations that get_inner_reference can handle and see
	 if what's inside is a constant: no need to do anything here for
	 addresses of variables or functions.  */
      for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem);
	   tem = TREE_OPERAND (tem, 0))
	;

      if (TREE_CODE (tem) == MEM_REF
	  && TREE_CODE (TREE_OPERAND (tem, 0)) == ADDR_EXPR)
	{
	  reloc = compute_reloc_for_constant (TREE_OPERAND (tem, 0));
	  break;
	}

      if (!targetm.binds_local_p (tem))
	reloc |= 2;
      else
	reloc |= 1;
      break;

    case PLUS_EXPR:
    case POINTER_PLUS_EXPR:
      reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
      reloc |= compute_reloc_for_constant (TREE_OPERAND (exp, 1));
      break;

    case MINUS_EXPR:
      reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
      reloc2 = compute_reloc_for_constant (TREE_OPERAND (exp, 1));
      /* The difference of two local labels is computable at link time.  */
      if (reloc == 1 && reloc2 == 1)
	reloc = 0;
      else
	reloc |= reloc2;
      break;

    CASE_CONVERT:
    case VIEW_CONVERT_EXPR:
      reloc = compute_reloc_for_constant (TREE_OPERAND (exp, 0));
      break;

    case CONSTRUCTOR:
      {
	unsigned HOST_WIDE_INT idx;
	FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, tem)
	  if (tem != 0)
	    reloc |= compute_reloc_for_constant (tem);
      }
      break;

    default:
      break;
    }
  return reloc;
}

/* Find all the constants whose addresses are referenced inside of EXP,
   and make sure assembler code with a label has been output for each one.
   Indicate whether an ADDR_EXPR has been encountered.  */

static void
output_addressed_constants (tree exp)
{
  tree tem;

  switch (TREE_CODE (exp))
    {
    case ADDR_EXPR:
    case FDESC_EXPR:
      /* Go inside any operations that get_inner_reference can handle and see
	 if what's inside is a constant: no need to do anything here for
	 addresses of variables or functions.  */
      for (tem = TREE_OPERAND (exp, 0); handled_component_p (tem);
	   tem = TREE_OPERAND (tem, 0))
	;

      /* If we have an initialized CONST_DECL, retrieve the initializer.  */
      if (TREE_CODE (tem) == CONST_DECL && DECL_INITIAL (tem))
	tem = DECL_INITIAL (tem);

      if (CONSTANT_CLASS_P (tem) || TREE_CODE (tem) == CONSTRUCTOR)
	output_constant_def (tem, 0);

      if (TREE_CODE (tem) == MEM_REF)
	output_addressed_constants (TREE_OPERAND (tem, 0));
      break;

    case PLUS_EXPR:
    case POINTER_PLUS_EXPR:
    case MINUS_EXPR:
      output_addressed_constants (TREE_OPERAND (exp, 1));
      /* Fall through.  */

    CASE_CONVERT:
    case VIEW_CONVERT_EXPR:
      output_addressed_constants (TREE_OPERAND (exp, 0));
      break;

    case CONSTRUCTOR:
      {
	unsigned HOST_WIDE_INT idx;
	FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), idx, tem)
	  if (tem != 0)
	    output_addressed_constants (tem);
      }
      break;

    default:
      break;
    }
}

/* Whether a constructor CTOR is a valid static constant initializer if all
   its elements are.  This used to be internal to initializer_constant_valid_p
   and has been exposed to let other functions like categorize_ctor_elements
   evaluate the property while walking a constructor for other purposes.  */

bool
constructor_static_from_elts_p (const_tree ctor)
{
  return (TREE_CONSTANT (ctor)
	  && (TREE_CODE (TREE_TYPE (ctor)) == UNION_TYPE
	      || TREE_CODE (TREE_TYPE (ctor)) == RECORD_TYPE
	      || TREE_CODE (TREE_TYPE (ctor)) == ARRAY_TYPE));
}

static tree initializer_constant_valid_p_1 (tree value, tree endtype,
					    tree *cache);

/* A subroutine of initializer_constant_valid_p.  VALUE is a MINUS_EXPR,
   PLUS_EXPR or POINTER_PLUS_EXPR.  This looks for cases of VALUE
   which are valid when ENDTYPE is an integer of any size; in
   particular, this does not accept a pointer minus a constant.  This
   returns null_pointer_node if the VALUE is an absolute constant
   which can be used to initialize a static variable.  Otherwise it
   returns NULL.  */

static tree
narrowing_initializer_constant_valid_p (tree value, tree endtype, tree *cache)
{
  tree op0, op1;

  if (!INTEGRAL_TYPE_P (endtype))
    return NULL_TREE;

  op0 = TREE_OPERAND (value, 0);
  op1 = TREE_OPERAND (value, 1);

  /* Like STRIP_NOPS except allow the operand mode to widen.  This
     works around a feature of fold that simplifies (int)(p1 - p2) to
     ((int)p1 - (int)p2) under the theory that the narrower operation
     is cheaper.  */

  while (CONVERT_EXPR_P (op0)
	 || TREE_CODE (op0) == NON_LVALUE_EXPR)
    {
      tree inner = TREE_OPERAND (op0, 0);
      if (inner == error_mark_node
	  || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner)))
	  || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op0)))
	      > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner)))))
	break;
      op0 = inner;
    }

  while (CONVERT_EXPR_P (op1)
	 || TREE_CODE (op1) == NON_LVALUE_EXPR)
    {
      tree inner = TREE_OPERAND (op1, 0);
      if (inner == error_mark_node
	  || ! INTEGRAL_MODE_P (TYPE_MODE (TREE_TYPE (inner)))
	  || (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (op1)))
	      > GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (inner)))))
	break;
      op1 = inner;
    }

  op0 = initializer_constant_valid_p_1 (op0, endtype, cache);
  if (!op0)
    return NULL_TREE;

  op1 = initializer_constant_valid_p_1 (op1, endtype,
					cache ? cache + 2 : NULL);
  /* Both initializers must be known.  */
  if (op1)
    {
      if (op0 == op1
	  && (op0 == null_pointer_node
	      || TREE_CODE (value) == MINUS_EXPR))
	return null_pointer_node;

      /* Support differences between labels.  */
      if (TREE_CODE (op0) == LABEL_DECL
	  && TREE_CODE (op1) == LABEL_DECL)
	return null_pointer_node;

      if (TREE_CODE (op0) == STRING_CST
	  && TREE_CODE (op1) == STRING_CST
	  && operand_equal_p (op0, op1, 1))
	return null_pointer_node;
    }

  return NULL_TREE;
}

/* Helper function of initializer_constant_valid_p.
   Return nonzero if VALUE is a valid constant-valued expression
   for use in initializing a static variable; one that can be an
   element of a "constant" initializer.

   Return null_pointer_node if the value is absolute;
   if it is relocatable, return the variable that determines the relocation.
   We assume that VALUE has been folded as much as possible;
   therefore, we do not need to check for such things as
   arithmetic-combinations of integers.

   Use CACHE (pointer to 2 tree values) for caching if non-NULL.  */

static tree
initializer_constant_valid_p_1 (tree value, tree endtype, tree *cache)
{
  tree ret;

  switch (TREE_CODE (value))
    {
    case CONSTRUCTOR:
      if (constructor_static_from_elts_p (value))
	{
	  unsigned HOST_WIDE_INT idx;
	  tree elt;
	  bool absolute = true;

	  if (cache && cache[0] == value)
	    return cache[1];
	  FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value), idx, elt)
	    {
	      tree reloc;
	      reloc = initializer_constant_valid_p_1 (elt, TREE_TYPE (elt),
						      NULL);
	      if (!reloc
		  /* An absolute value is required with reverse SSO.  */
		  || (reloc != null_pointer_node
		      && TYPE_REVERSE_STORAGE_ORDER (TREE_TYPE (value))
		      && !AGGREGATE_TYPE_P (TREE_TYPE (elt))))
		{
		  if (cache)
		    {
		      cache[0] = value;
		      cache[1] = NULL_TREE;
		    }
		  return NULL_TREE;
		}
	      if (reloc != null_pointer_node)
		absolute = false;
	    }
	  /* For a non-absolute relocation, there is no single
	     variable that can be "the variable that determines the
	     relocation."  */
	  if (cache)
	    {
	      cache[0] = value;
	      cache[1] = absolute ? null_pointer_node : error_mark_node;
	    }
	  return absolute ? null_pointer_node : error_mark_node;
	}

      return TREE_STATIC (value) ? null_pointer_node : NULL_TREE;

    case INTEGER_CST:
    case VECTOR_CST:
    case REAL_CST:
    case FIXED_CST:
    case STRING_CST:
    case COMPLEX_CST:
      return null_pointer_node;

    case ADDR_EXPR:
    case FDESC_EXPR:
      {
	tree op0 = staticp (TREE_OPERAND (value, 0));
	if (op0)
	  {
	    /* "&(*a).f" is like unto pointer arithmetic.  If "a" turns out
	       to be a constant, this is old-skool offsetof-like nonsense.  */
	    if (TREE_CODE (op0) == INDIRECT_REF
		&& TREE_CONSTANT (TREE_OPERAND (op0, 0)))
	      return null_pointer_node;
	    /* Taking the address of a nested function involves a trampoline,
	       unless we don't need or want one.  */
	    if (TREE_CODE (op0) == FUNCTION_DECL
		&& DECL_STATIC_CHAIN (op0)
		&& !TREE_NO_TRAMPOLINE (value))
	      return NULL_TREE;
	    /* "&{...}" requires a temporary to hold the constructed
	       object.  */
	    if (TREE_CODE (op0) == CONSTRUCTOR)
	      return NULL_TREE;
	  }
	return op0;
      }

    case NON_LVALUE_EXPR:
      return initializer_constant_valid_p_1 (TREE_OPERAND (value, 0),
					     endtype, cache);

    case VIEW_CONVERT_EXPR:
      {
	tree src = TREE_OPERAND (value, 0);
	tree src_type = TREE_TYPE (src);
	tree dest_type = TREE_TYPE (value);

	/* Allow view-conversions from aggregate to non-aggregate type only
	   if the bit pattern is fully preserved afterwards; otherwise, the
	   RTL expander won't be able to apply a subsequent transformation
	   to the underlying constructor.  */
	if (AGGREGATE_TYPE_P (src_type) && !AGGREGATE_TYPE_P (dest_type))
	  {
	    if (TYPE_MODE (endtype) == TYPE_MODE (dest_type))
	      return initializer_constant_valid_p_1 (src, endtype, cache);
	    else
	      return NULL_TREE;
	  }

	/* Allow all other kinds of view-conversion.  */
	return initializer_constant_valid_p_1 (src, endtype, cache);
      }

    CASE_CONVERT:
      {
	tree src = TREE_OPERAND (value, 0);
	tree src_type = TREE_TYPE (src);
	tree dest_type = TREE_TYPE (value);

	/* Allow conversions between pointer types, floating-point
	   types, and offset types.  */
	if ((POINTER_TYPE_P (dest_type) && POINTER_TYPE_P (src_type))
	    || (FLOAT_TYPE_P (dest_type) && FLOAT_TYPE_P (src_type))
	    || (TREE_CODE (dest_type) == OFFSET_TYPE
		&& TREE_CODE (src_type) == OFFSET_TYPE))
	  return initializer_constant_valid_p_1 (src, endtype, cache);

	/* Allow length-preserving conversions between integer types.  */
	if (INTEGRAL_TYPE_P (dest_type) && INTEGRAL_TYPE_P (src_type)
	    && (TYPE_PRECISION (dest_type) == TYPE_PRECISION (src_type)))
	  return initializer_constant_valid_p_1 (src, endtype, cache);

	/* Allow conversions between other integer types only if
	   explicit value.  */
	if (INTEGRAL_TYPE_P (dest_type) && INTEGRAL_TYPE_P (src_type))
	  {
	    tree inner = initializer_constant_valid_p_1 (src, endtype, cache);
	    if (inner == null_pointer_node)
	      return null_pointer_node;
	    break;
	  }

	/* Allow (int) &foo provided int is as wide as a pointer.  */
	if (INTEGRAL_TYPE_P (dest_type) && POINTER_TYPE_P (src_type)
	    && (TYPE_PRECISION (dest_type) >= TYPE_PRECISION (src_type)))
	  return initializer_constant_valid_p_1 (src, endtype, cache);

	/* Likewise conversions from int to pointers, but also allow
	   conversions from 0.  */
	if ((POINTER_TYPE_P (dest_type)
	     || TREE_CODE (dest_type) == OFFSET_TYPE)
	    && INTEGRAL_TYPE_P (src_type))
	  {
	    if (TREE_CODE (src) == INTEGER_CST
		&& TYPE_PRECISION (dest_type) >= TYPE_PRECISION (src_type))
	      return null_pointer_node;
	    if (integer_zerop (src))
	      return null_pointer_node;
	    else if (TYPE_PRECISION (dest_type) <= TYPE_PRECISION (src_type))
	      return initializer_constant_valid_p_1 (src, endtype, cache);
	  }

	/* Allow conversions to struct or union types if the value
	   inside is okay.  */
	if (TREE_CODE (dest_type) == RECORD_TYPE
	    || TREE_CODE (dest_type) == UNION_TYPE)
	  return initializer_constant_valid_p_1 (src, endtype, cache);
      }
      break;

    case POINTER_PLUS_EXPR:
    case PLUS_EXPR:
      /* Any valid floating-point constants will have been folded by now;
	 with -frounding-math we hit this with addition of two constants.  */
      if (TREE_CODE (endtype) == REAL_TYPE)
	return NULL_TREE;
      if (cache && cache[0] == value)
	return cache[1];
      if (! INTEGRAL_TYPE_P (endtype)
	  || TYPE_PRECISION (endtype) >= TYPE_PRECISION (TREE_TYPE (value)))
	{
	  tree ncache[4] = { NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE };
	  tree valid0
	    = initializer_constant_valid_p_1 (TREE_OPERAND (value, 0),
					      endtype, ncache);
	  tree valid1
	    = initializer_constant_valid_p_1 (TREE_OPERAND (value, 1),
					      endtype, ncache + 2);
	  /* If either term is absolute, use the other term's relocation.  */
	  if (valid0 == null_pointer_node)
	    ret = valid1;
	  else if (valid1 == null_pointer_node)
	    ret = valid0;
	  /* Support narrowing pointer differences.  */
	  else
	    ret = narrowing_initializer_constant_valid_p (value, endtype,
							  ncache);
	}
      else
      /* Support narrowing pointer differences.  */
	ret = narrowing_initializer_constant_valid_p (value, endtype, NULL);
      if (cache)
	{
	  cache[0] = value;
	  cache[1] = ret;
	}
      return ret;

    case MINUS_EXPR:
      if (TREE_CODE (endtype) == REAL_TYPE)
	return NULL_TREE;
      if (cache && cache[0] == value)
	return cache[1];
      if (! INTEGRAL_TYPE_P (endtype)
	  || TYPE_PRECISION (endtype) >= TYPE_PRECISION (TREE_TYPE (value)))
	{
	  tree ncache[4] = { NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE };
	  tree valid0
	    = initializer_constant_valid_p_1 (TREE_OPERAND (value, 0),
					      endtype, ncache);
	  tree valid1
	    = initializer_constant_valid_p_1 (TREE_OPERAND (value, 1),
					      endtype, ncache + 2);
	  /* Win if second argument is absolute.  */
	  if (valid1 == null_pointer_node)
	    ret = valid0;
	  /* Win if both arguments have the same relocation.
	     Then the value is absolute.  */
	  else if (valid0 == valid1 && valid0 != 0)
	    ret = null_pointer_node;
	  /* Since GCC guarantees that string constants are unique in the
	     generated code, a subtraction between two copies of the same
	     constant string is absolute.  */
	  else if (valid0 && TREE_CODE (valid0) == STRING_CST
		   && valid1 && TREE_CODE (valid1) == STRING_CST
		   && operand_equal_p (valid0, valid1, 1))
	    ret = null_pointer_node;
	  /* Support narrowing differences.  */
	  else
	    ret = narrowing_initializer_constant_valid_p (value, endtype,
							  ncache);
	}
      else
	/* Support narrowing differences.  */
	ret = narrowing_initializer_constant_valid_p (value, endtype, NULL);
      if (cache)
	{
	  cache[0] = value;
	  cache[1] = ret;
	}
      return ret;

    default:
      break;
    }

  return NULL_TREE;
}

/* Return nonzero if VALUE is a valid constant-valued expression
   for use in initializing a static variable; one that can be an
   element of a "constant" initializer.

   Return null_pointer_node if the value is absolute;
   if it is relocatable, return the variable that determines the relocation.
   We assume that VALUE has been folded as much as possible;
   therefore, we do not need to check for such things as
   arithmetic-combinations of integers.  */
tree
initializer_constant_valid_p (tree value, tree endtype, bool reverse)
{
  tree reloc = initializer_constant_valid_p_1 (value, endtype, NULL);

  /* An absolute value is required with reverse storage order.  */
  if (reloc
      && reloc != null_pointer_node
      && reverse
      && !AGGREGATE_TYPE_P (endtype)
      && !VECTOR_TYPE_P (endtype))
    reloc = NULL_TREE;

  return reloc;
}

/* Return true if VALUE is a valid constant-valued expression
   for use in initializing a static bit-field; one that can be
   an element of a "constant" initializer.  */

bool
initializer_constant_valid_for_bitfield_p (tree value)
{
  /* For bitfields we support integer constants or possibly nested aggregates
     of such.  */
  switch (TREE_CODE (value))
    {
    case CONSTRUCTOR:
      {
	unsigned HOST_WIDE_INT idx;
	tree elt;

	FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (value), idx, elt)
	  if (!initializer_constant_valid_for_bitfield_p (elt))
	    return false;
	return true;
      }

    case INTEGER_CST:
    case REAL_CST:
      return true;

    case VIEW_CONVERT_EXPR:
    case NON_LVALUE_EXPR:
      return
	initializer_constant_valid_for_bitfield_p (TREE_OPERAND (value, 0));

    default:
      break;
    }

  return false;
}

/* output_constructor outer state of relevance in recursive calls, typically
   for nested aggregate bitfields.  */

struct oc_outer_state {
  unsigned int bit_offset;  /* current position in ...  */
  int byte;                 /* ... the outer byte buffer.  */
};

static unsigned HOST_WIDE_INT
output_constructor (tree, unsigned HOST_WIDE_INT, unsigned int, bool,
		    oc_outer_state *);

/* Output assembler code for constant EXP, with no label.
   This includes the pseudo-op such as ".int" or ".byte", and a newline.
   Assumes output_addressed_constants has been done on EXP already.

   Generate at least SIZE bytes of assembler data, padding at the end
   with zeros if necessary.  SIZE must always be specified.  The returned
   value is the actual number of bytes of assembler data generated, which
   may be bigger than SIZE if the object contains a variable length field.

   SIZE is important for structure constructors,
   since trailing members may have been omitted from the constructor.
   It is also important for initialization of arrays from string constants
   since the full length of the string constant might not be wanted.
   It is also needed for initialization of unions, where the initializer's
   type is just one member, and that may not be as long as the union.

   There a case in which we would fail to output exactly SIZE bytes:
   for a structure constructor that wants to produce more than SIZE bytes.
   But such constructors will never be generated for any possible input.

   ALIGN is the alignment of the data in bits.

   If REVERSE is true, EXP is output in reverse storage order.  */

static unsigned HOST_WIDE_INT
output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align,
		 bool reverse)
{
  enum tree_code code;
  unsigned HOST_WIDE_INT thissize;
  rtx cst;

  if (size == 0 || flag_syntax_only)
    return size;

  /* See if we're trying to initialize a pointer in a non-default mode
     to the address of some declaration somewhere.  If the target says
     the mode is valid for pointers, assume the target has a way of
     resolving it.  */
  if (TREE_CODE (exp) == NOP_EXPR
      && POINTER_TYPE_P (TREE_TYPE (exp))
      && targetm.addr_space.valid_pointer_mode
	   (TYPE_MODE (TREE_TYPE (exp)),
	    TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp)))))
    {
      tree saved_type = TREE_TYPE (exp);

      /* Peel off any intermediate conversions-to-pointer for valid
	 pointer modes.  */
      while (TREE_CODE (exp) == NOP_EXPR
	     && POINTER_TYPE_P (TREE_TYPE (exp))
	     && targetm.addr_space.valid_pointer_mode
		  (TYPE_MODE (TREE_TYPE (exp)),
		   TYPE_ADDR_SPACE (TREE_TYPE (TREE_TYPE (exp)))))
	exp = TREE_OPERAND (exp, 0);

      /* If what we're left with is the address of something, we can
	 convert the address to the final type and output it that
	 way.  */
      if (TREE_CODE (exp) == ADDR_EXPR)
	exp = build1 (ADDR_EXPR, saved_type, TREE_OPERAND (exp, 0));
      /* Likewise for constant ints.  */
      else if (TREE_CODE (exp) == INTEGER_CST)
	exp = fold_convert (saved_type, exp);

    }

  /* Eliminate any conversions since we'll be outputting the underlying
     constant.  */
  while (CONVERT_EXPR_P (exp)
	 || TREE_CODE (exp) == NON_LVALUE_EXPR
	 || TREE_CODE (exp) == VIEW_CONVERT_EXPR)
    {
      HOST_WIDE_INT type_size = int_size_in_bytes (TREE_TYPE (exp));
      HOST_WIDE_INT op_size = int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0)));

      /* Make sure eliminating the conversion is really a no-op, except with
	 VIEW_CONVERT_EXPRs to allow for wild Ada unchecked conversions and
	 union types to allow for Ada unchecked unions.  */
      if (type_size > op_size
	  && TREE_CODE (exp) != VIEW_CONVERT_EXPR
	  && TREE_CODE (TREE_TYPE (exp)) != UNION_TYPE)
	/* Keep the conversion. */
	break;
      else
	exp = TREE_OPERAND (exp, 0);
    }

  code = TREE_CODE (TREE_TYPE (exp));
  thissize = int_size_in_bytes (TREE_TYPE (exp));

  /* Allow a constructor with no elements for any data type.
     This means to fill the space with zeros.  */
  if (TREE_CODE (exp) == CONSTRUCTOR
      && vec_safe_is_empty (CONSTRUCTOR_ELTS (exp)))
    {
      assemble_zeros (size);
      return size;
    }

  if (TREE_CODE (exp) == FDESC_EXPR)
    {
#ifdef ASM_OUTPUT_FDESC
      HOST_WIDE_INT part = tree_to_shwi (TREE_OPERAND (exp, 1));
      tree decl = TREE_OPERAND (exp, 0);
      ASM_OUTPUT_FDESC (asm_out_file, decl, part);
#else
      gcc_unreachable ();
#endif
      return size;
    }

  /* Now output the underlying data.  If we've handling the padding, return.
     Otherwise, break and ensure SIZE is the size written.  */
  switch (code)
    {
    case BOOLEAN_TYPE:
    case INTEGER_TYPE:
    case ENUMERAL_TYPE:
    case POINTER_TYPE:
    case REFERENCE_TYPE:
    case OFFSET_TYPE:
    case FIXED_POINT_TYPE:
    case POINTER_BOUNDS_TYPE:
    case NULLPTR_TYPE:
      cst = expand_expr (exp, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
      if (reverse)
	cst = flip_storage_order (TYPE_MODE (TREE_TYPE (exp)), cst);
      if (!assemble_integer (cst, MIN (size, thissize), align, 0))
	error ("initializer for integer/fixed-point value is too complicated");
      break;

    case REAL_TYPE:
      if (TREE_CODE (exp) != REAL_CST)
	error ("initializer for floating value is not a floating constant");
      else
	assemble_real (TREE_REAL_CST (exp), TYPE_MODE (TREE_TYPE (exp)),
		       align, reverse);
      break;

    case COMPLEX_TYPE:
      output_constant (TREE_REALPART (exp), thissize / 2, align, reverse);
      output_constant (TREE_IMAGPART (exp), thissize / 2,
		       min_align (align, BITS_PER_UNIT * (thissize / 2)),
		       reverse);
      break;

    case ARRAY_TYPE:
    case VECTOR_TYPE:
      switch (TREE_CODE (exp))
	{
	case CONSTRUCTOR:
	  return output_constructor (exp, size, align, reverse, NULL);
	case STRING_CST:
	  thissize
	    = MIN ((unsigned HOST_WIDE_INT)TREE_STRING_LENGTH (exp), size);
	  assemble_string (TREE_STRING_POINTER (exp), thissize);
	  break;
	case VECTOR_CST:
	  {
	    machine_mode inner = TYPE_MODE (TREE_TYPE (TREE_TYPE (exp)));
	    unsigned int nalign = MIN (align, GET_MODE_ALIGNMENT (inner));
	    int elt_size = GET_MODE_SIZE (inner);
	    output_constant (VECTOR_CST_ELT (exp, 0), elt_size, align,
			     reverse);
	    thissize = elt_size;
	    for (unsigned int i = 1; i < VECTOR_CST_NELTS (exp); i++)
	      {
		output_constant (VECTOR_CST_ELT (exp, i), elt_size, nalign,
				 reverse);
		thissize += elt_size;
	      }
	    break;
	  }
	default:
	  gcc_unreachable ();
	}
      break;

    case RECORD_TYPE:
    case UNION_TYPE:
      gcc_assert (TREE_CODE (exp) == CONSTRUCTOR);
      return output_constructor (exp, size, align, reverse, NULL);

    case ERROR_MARK:
      return 0;

    default:
      gcc_unreachable ();
    }

  if (size > thissize)
    assemble_zeros (size - thissize);

  return size;
}

/* Subroutine of output_constructor, used for computing the size of
   arrays of unspecified length.  VAL must be a CONSTRUCTOR of an array
   type with an unspecified upper bound.  */

static unsigned HOST_WIDE_INT
array_size_for_constructor (tree val)
{
  tree max_index;
  unsigned HOST_WIDE_INT cnt;
  tree index, value, tmp;
  offset_int i;

  /* This code used to attempt to handle string constants that are not
     arrays of single-bytes, but nothing else does, so there's no point in
     doing it here.  */
  if (TREE_CODE (val) == STRING_CST)
    return TREE_STRING_LENGTH (val);

  max_index = NULL_TREE;
  FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (val), cnt, index, value)
    {
      if (TREE_CODE (index) == RANGE_EXPR)
	index = TREE_OPERAND (index, 1);
      if (max_index == NULL_TREE || tree_int_cst_lt (max_index, index))
	max_index = index;
    }

  if (max_index == NULL_TREE)
    return 0;

  /* Compute the total number of array elements.  */
  tmp = TYPE_MIN_VALUE (TYPE_DOMAIN (TREE_TYPE (val)));
  i = wi::to_offset (max_index) - wi::to_offset (tmp) + 1;

  /* Multiply by the array element unit size to find number of bytes.  */
  i *= wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (val))));

  gcc_assert (wi::fits_uhwi_p (i));
  return i.to_uhwi ();
}

/* Other datastructures + helpers for output_constructor.  */

/* output_constructor local state to support interaction with helpers.  */

struct oc_local_state {

  /* Received arguments.  */
  tree exp;                     /* Constructor expression.  */
  tree type;                    /* Type of constructor expression.  */
  unsigned HOST_WIDE_INT size;  /* # bytes to output - pad if necessary.  */
  unsigned int align;           /* Known initial alignment.  */
  tree min_index;               /* Lower bound if specified for an array.  */

  /* Output processing state.  */
  HOST_WIDE_INT total_bytes;  /* # bytes output so far / current position.  */
  int byte;                   /* Part of a bitfield byte yet to be output.  */
  int last_relative_index;    /* Implicit or explicit index of the last
				 array element output within a bitfield.  */
  bool byte_buffer_in_use;    /* Whether BYTE is in use.  */
  bool reverse;               /* Whether reverse storage order is in use.  */

  /* Current element.  */
  tree field;      /* Current field decl in a record.  */
  tree val;        /* Current element value.  */
  tree index;      /* Current element index.  */

};

/* Helper for output_constructor.  From the current LOCAL state, output a
   RANGE_EXPR element.  */

static void
output_constructor_array_range (oc_local_state *local)
{
  unsigned HOST_WIDE_INT fieldsize
    = int_size_in_bytes (TREE_TYPE (local->type));

  HOST_WIDE_INT lo_index
    = tree_to_shwi (TREE_OPERAND (local->index, 0));
  HOST_WIDE_INT hi_index
    = tree_to_shwi (TREE_OPERAND (local->index, 1));
  HOST_WIDE_INT index;

  unsigned int align2
    = min_align (local->align, fieldsize * BITS_PER_UNIT);

  for (index = lo_index; index <= hi_index; index++)
    {
      /* Output the element's initial value.  */
      if (local->val == NULL_TREE)
	assemble_zeros (fieldsize);
      else
	fieldsize
	  = output_constant (local->val, fieldsize, align2, local->reverse);

      /* Count its size.  */
      local->total_bytes += fieldsize;
    }
}

/* Helper for output_constructor.  From the current LOCAL state, output a
   field element that is not true bitfield or part of an outer one.  */

static void
output_constructor_regular_field (oc_local_state *local)
{
  /* Field size and position.  Since this structure is static, we know the
     positions are constant.  */
  unsigned HOST_WIDE_INT fieldsize;
  HOST_WIDE_INT fieldpos;

  unsigned int align2;

  if (local->index != NULL_TREE)
    {
      /* Perform the index calculation in modulo arithmetic but
	 sign-extend the result because Ada has negative DECL_FIELD_OFFSETs
	 but we are using an unsigned sizetype.  */
      unsigned prec = TYPE_PRECISION (sizetype);
      offset_int idx = wi::sext (wi::to_offset (local->index)
				 - wi::to_offset (local->min_index), prec);
      fieldpos = (idx * wi::to_offset (TYPE_SIZE_UNIT (TREE_TYPE (local->val))))
	.to_short_addr ();
    }
  else if (local->field != NULL_TREE)
    fieldpos = int_byte_position (local->field);
  else
    fieldpos = 0;

  /* Output any buffered-up bit-fields preceding this element.  */
  if (local->byte_buffer_in_use)
    {
      assemble_integer (GEN_INT (local->byte), 1, BITS_PER_UNIT, 1);
      local->total_bytes++;
      local->byte_buffer_in_use = false;
    }

  /* Advance to offset of this element.
     Note no alignment needed in an array, since that is guaranteed
     if each element has the proper size.  */
  if ((local->field != NULL_TREE || local->index != NULL_TREE)
      && fieldpos > local->total_bytes)
    {
      assemble_zeros (fieldpos - local->total_bytes);
      local->total_bytes = fieldpos;
    }

  /* Find the alignment of this element.  */
  align2 = min_align (local->align, BITS_PER_UNIT * fieldpos);

  /* Determine size this element should occupy.  */
  if (local->field)
    {
      fieldsize = 0;

      /* If this is an array with an unspecified upper bound,
	 the initializer determines the size.  */
      /* ??? This ought to only checked if DECL_SIZE_UNIT is NULL,
	 but we cannot do this until the deprecated support for
	 initializing zero-length array members is removed.  */
      if (TREE_CODE (TREE_TYPE (local->field)) == ARRAY_TYPE
	  && TYPE_DOMAIN (TREE_TYPE (local->field))
	  && ! TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (local->field))))
	{
	  fieldsize = array_size_for_constructor (local->val);
	  /* Given a non-empty initialization, this field had
	     better be last.  */
	  gcc_assert (!fieldsize || !DECL_CHAIN (local->field));
	}
      else
	fieldsize = tree_to_uhwi (DECL_SIZE_UNIT (local->field));
    }
  else
    fieldsize = int_size_in_bytes (TREE_TYPE (local->type));

  /* Output the element's initial value.  */
  if (local->val == NULL_TREE)
    assemble_zeros (fieldsize);
  else
    fieldsize
      = output_constant (local->val, fieldsize, align2, local->reverse);

  /* Count its size.  */
  local->total_bytes += fieldsize;
}

/* Helper for output_constructor.  From the LOCAL state, output an element
   that is a true bitfield or part of an outer one.  BIT_OFFSET is the offset
   from the start of a possibly ongoing outer byte buffer.  */

static void
output_constructor_bitfield (oc_local_state *local, unsigned int bit_offset)
{
  /* Bit size of this element.  */
  HOST_WIDE_INT ebitsize
    = (local->field
       ? tree_to_uhwi (DECL_SIZE (local->field))
       : tree_to_uhwi (TYPE_SIZE (TREE_TYPE (local->type))));

  /* Relative index of this element if this is an array component.  */
  HOST_WIDE_INT relative_index
    = (!local->field
       ? (local->index
	  ? (tree_to_shwi (local->index)
	     - tree_to_shwi (local->min_index))
	  : local->last_relative_index + 1)
       : 0);

  /* Bit position of this element from the start of the containing
     constructor.  */
  HOST_WIDE_INT constructor_relative_ebitpos
      = (local->field
	 ? int_bit_position (local->field)
	 : ebitsize * relative_index);

  /* Bit position of this element from the start of a possibly ongoing
     outer byte buffer.  */
  HOST_WIDE_INT byte_relative_ebitpos
    = bit_offset + constructor_relative_ebitpos;

  /* From the start of a possibly ongoing outer byte buffer, offsets to
     the first bit of this element and to the first bit past the end of
     this element.  */
  HOST_WIDE_INT next_offset = byte_relative_ebitpos;
  HOST_WIDE_INT end_offset = byte_relative_ebitpos + ebitsize;

  local->last_relative_index = relative_index;

  if (local->val == NULL_TREE)
    local->val = integer_zero_node;

  while (TREE_CODE (local->val) == VIEW_CONVERT_EXPR
	 || TREE_CODE (local->val) == NON_LVALUE_EXPR)
    local->val = TREE_OPERAND (local->val, 0);

  if (TREE_CODE (local->val) != INTEGER_CST
      && TREE_CODE (local->val) != CONSTRUCTOR)
    {
      error ("invalid initial value for member %qE", DECL_NAME (local->field));
      return;
    }

  /* If this field does not start in this (or next) byte, skip some bytes.  */
  if (next_offset / BITS_PER_UNIT != local->total_bytes)
    {
      /* Output remnant of any bit field in previous bytes.  */
      if (local->byte_buffer_in_use)
	{
	  assemble_integer (GEN_INT (local->byte), 1, BITS_PER_UNIT, 1);
	  local->total_bytes++;
	  local->byte_buffer_in_use = false;
	}

      /* If still not at proper byte, advance to there.  */
      if (next_offset / BITS_PER_UNIT != local->total_bytes)
	{
	  gcc_assert (next_offset / BITS_PER_UNIT >= local->total_bytes);
	  assemble_zeros (next_offset / BITS_PER_UNIT - local->total_bytes);
	  local->total_bytes = next_offset / BITS_PER_UNIT;
	}
    }

  /* Set up the buffer if necessary.  */
  if (!local->byte_buffer_in_use)
    {
      local->byte = 0;
      if (ebitsize > 0)
	local->byte_buffer_in_use = true;
    }

  /* If this is nested constructor, recurse passing the bit offset and the
     pending data, then retrieve the new pending data afterwards.  */
  if (TREE_CODE (local->val) == CONSTRUCTOR)
    {
      oc_outer_state temp_state;
      temp_state.bit_offset = next_offset % BITS_PER_UNIT;
      temp_state.byte = local->byte;
      local->total_bytes
	+= output_constructor (local->val, 0, 0, local->reverse, &temp_state);
      local->byte = temp_state.byte;
      return;
    }

  /* Otherwise, we must split the element into pieces that fall within
     separate bytes, and combine each byte with previous or following
     bit-fields.  */
  while (next_offset < end_offset)
    {
      int this_time;
      int shift;
      HOST_WIDE_INT value;
      HOST_WIDE_INT next_byte = next_offset / BITS_PER_UNIT;
      HOST_WIDE_INT next_bit = next_offset % BITS_PER_UNIT;

      /* Advance from byte to byte within this element when necessary.  */
      while (next_byte != local->total_bytes)
	{
	  assemble_integer (GEN_INT (local->byte), 1, BITS_PER_UNIT, 1);
	  local->total_bytes++;
	  local->byte = 0;
	}

      /* Number of bits we can process at once (all part of the same byte).  */
      this_time = MIN (end_offset - next_offset, BITS_PER_UNIT - next_bit);
      if (local->reverse ? !BYTES_BIG_ENDIAN : BYTES_BIG_ENDIAN)
	{
	  /* For big-endian data, take the most significant bits (of the
	     bits that are significant) first and put them into bytes from
	     the most significant end.  */
	  shift = end_offset - next_offset - this_time;

	  /* Don't try to take a bunch of bits that cross
	     the word boundary in the INTEGER_CST.  We can
	     only select bits from one element.  */
	  if ((shift / HOST_BITS_PER_WIDE_INT)
	      != ((shift + this_time - 1) / HOST_BITS_PER_WIDE_INT))
	    {
	      const int end = shift + this_time - 1;
	      shift = end & -HOST_BITS_PER_WIDE_INT;
	      this_time = end - shift + 1;
	    }

	  /* Now get the bits from the appropriate constant word.  */
	  value = TREE_INT_CST_ELT (local->val, shift / HOST_BITS_PER_WIDE_INT);
	  shift = shift & (HOST_BITS_PER_WIDE_INT - 1);

	  /* Get the result.  This works only when:
	     1 <= this_time <= HOST_BITS_PER_WIDE_INT.  */
	  local->byte |= (((value >> shift)
			   & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1))
			  << (BITS_PER_UNIT - this_time - next_bit));
	}
      else
	{
	  /* On little-endian machines, take the least significant bits of
	     the value first and pack them starting at the least significant
	     bits of the bytes.  */
	  shift = next_offset - byte_relative_ebitpos;

	  /* Don't try to take a bunch of bits that cross
	     the word boundary in the INTEGER_CST.  We can
	     only select bits from one element.  */
	  if ((shift / HOST_BITS_PER_WIDE_INT)
	      != ((shift + this_time - 1) / HOST_BITS_PER_WIDE_INT))
	    this_time
	      = HOST_BITS_PER_WIDE_INT - (shift & (HOST_BITS_PER_WIDE_INT - 1));

	  /* Now get the bits from the appropriate constant word.  */
	  value = TREE_INT_CST_ELT (local->val, shift / HOST_BITS_PER_WIDE_INT);
	  shift = shift & (HOST_BITS_PER_WIDE_INT - 1);

	  /* Get the result.  This works only when:
	     1 <= this_time <= HOST_BITS_PER_WIDE_INT.  */
	  local->byte |= (((value >> shift)
			   & (((HOST_WIDE_INT) 2 << (this_time - 1)) - 1))
			  << next_bit);
	}

      next_offset += this_time;
      local->byte_buffer_in_use = true;
    }
}

/* Subroutine of output_constant, used for CONSTRUCTORs (aggregate constants).
   Generate at least SIZE bytes, padding if necessary.  OUTER designates the
   caller output state of relevance in recursive invocations.  */

static unsigned HOST_WIDE_INT
output_constructor (tree exp, unsigned HOST_WIDE_INT size, unsigned int align,
		    bool reverse, oc_outer_state *outer)
{
  unsigned HOST_WIDE_INT cnt;
  constructor_elt *ce;
  oc_local_state local;

  /* Setup our local state to communicate with helpers.  */
  local.exp = exp;
  local.type = TREE_TYPE (exp);
  local.size = size;
  local.align = align;
  if (TREE_CODE (local.type) == ARRAY_TYPE && TYPE_DOMAIN (local.type))
    local.min_index = TYPE_MIN_VALUE (TYPE_DOMAIN (local.type));
  else
    local.min_index = NULL_TREE;

  local.total_bytes = 0;
  local.byte_buffer_in_use = outer != NULL;
  local.byte = outer ? outer->byte : 0;
  local.last_relative_index = -1;
  /* The storage order is specified for every aggregate type.  */
  if (AGGREGATE_TYPE_P (local.type))
    local.reverse = TYPE_REVERSE_STORAGE_ORDER (local.type);
  else
    local.reverse = reverse;

  gcc_assert (HOST_BITS_PER_WIDE_INT >= BITS_PER_UNIT);

  /* As CE goes through the elements of the constant, FIELD goes through the
     structure fields if the constant is a structure.  If the constant is a
     union, we override this by getting the field from the TREE_LIST element.
     But the constant could also be an array.  Then FIELD is zero.

     There is always a maximum of one element in the chain LINK for unions
     (even if the initializer in a source program incorrectly contains
     more one).  */

  if (TREE_CODE (local.type) == RECORD_TYPE)
    local.field = TYPE_FIELDS (local.type);
  else
    local.field = NULL_TREE;

  for (cnt = 0;
       vec_safe_iterate (CONSTRUCTOR_ELTS (exp), cnt, &ce);
       cnt++, local.field = local.field ? DECL_CHAIN (local.field) : 0)
    {
      local.val = ce->value;
      local.index = NULL_TREE;

      /* The element in a union constructor specifies the proper field
	 or index.  */
      if (RECORD_OR_UNION_TYPE_P (local.type) && ce->index != NULL_TREE)
	local.field = ce->index;

      else if (TREE_CODE (local.type) == ARRAY_TYPE)
	local.index = ce->index;

      if (local.field && flag_verbose_asm)
	fprintf (asm_out_file, "%s %s:\n",
		 ASM_COMMENT_START,
		 DECL_NAME (local.field)
		 ? IDENTIFIER_POINTER (DECL_NAME (local.field))
		 : "<anonymous>");

      /* Eliminate the marker that makes a cast not be an lvalue.  */
      if (local.val != NULL_TREE)
	STRIP_NOPS (local.val);

      /* Output the current element, using the appropriate helper ...  */

      /* For an array slice not part of an outer bitfield.  */
      if (!outer
	  && local.index != NULL_TREE
	  && TREE_CODE (local.index) == RANGE_EXPR)
	output_constructor_array_range (&local);

      /* For a field that is neither a true bitfield nor part of an outer one,
	 known to be at least byte aligned and multiple-of-bytes long.  */
      else if (!outer
	       && (local.field == NULL_TREE
		   || !CONSTRUCTOR_BITFIELD_P (local.field)))
	output_constructor_regular_field (&local);

      /* For a true bitfield or part of an outer one.  Only INTEGER_CSTs are
	 supported for scalar fields, so we may need to convert first.  */
      else
        {
	  if (TREE_CODE (local.val) == REAL_CST)
	    local.val
	      = fold_unary (VIEW_CONVERT_EXPR,
			    build_nonstandard_integer_type
			    (TYPE_PRECISION (TREE_TYPE (local.val)), 0),
			    local.val);
	  output_constructor_bitfield (&local, outer ? outer->bit_offset : 0);
	}
    }

  /* If we are not at toplevel, save the pending data for our caller.
     Otherwise output the pending data and padding zeros as needed. */
  if (outer)
    outer->byte = local.byte;
  else
    {
      if (local.byte_buffer_in_use)
	{
	  assemble_integer (GEN_INT (local.byte), 1, BITS_PER_UNIT, 1);
	  local.total_bytes++;
	}

      if ((unsigned HOST_WIDE_INT)local.total_bytes < local.size)
	{
	  assemble_zeros (local.size - local.total_bytes);
	  local.total_bytes = local.size;
	}
    }

  return local.total_bytes;
}

/* Mark DECL as weak.  */

static void
mark_weak (tree decl)
{
  if (DECL_WEAK (decl))
    return;

  struct symtab_node *n = symtab_node::get (decl);
  if (n && n->refuse_visibility_changes)
    error ("%+D declared weak after being used", decl);
  DECL_WEAK (decl) = 1;

  if (DECL_RTL_SET_P (decl)
      && MEM_P (DECL_RTL (decl))
      && XEXP (DECL_RTL (decl), 0)
      && GET_CODE (XEXP (DECL_RTL (decl), 0)) == SYMBOL_REF)
    SYMBOL_REF_WEAK (XEXP (DECL_RTL (decl), 0)) = 1;
}

/* Merge weak status between NEWDECL and OLDDECL.  */

void
merge_weak (tree newdecl, tree olddecl)
{
  if (DECL_WEAK (newdecl) == DECL_WEAK (olddecl))
    {
      if (DECL_WEAK (newdecl) && TARGET_SUPPORTS_WEAK)
        {
          tree *pwd;
          /* We put the NEWDECL on the weak_decls list at some point
             and OLDDECL as well.  Keep just OLDDECL on the list.  */
	  for (pwd = &weak_decls; *pwd; pwd = &TREE_CHAIN (*pwd))
	    if (TREE_VALUE (*pwd) == newdecl)
	      {
	        *pwd = TREE_CHAIN (*pwd);
		break;
	      }
        }
      return;
    }

  if (DECL_WEAK (newdecl))
    {
      tree wd;

      /* NEWDECL is weak, but OLDDECL is not.  */

      /* If we already output the OLDDECL, we're in trouble; we can't
	 go back and make it weak.  This should never happen in
	 unit-at-a-time compilation.  */
      gcc_assert (!TREE_ASM_WRITTEN (olddecl));

      /* If we've already generated rtl referencing OLDDECL, we may
	 have done so in a way that will not function properly with
	 a weak symbol.  Again in unit-at-a-time this should be
	 impossible.  */
      gcc_assert (!TREE_USED (olddecl)
	          || !TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (olddecl)));

      if (TARGET_SUPPORTS_WEAK)
	{
	  /* We put the NEWDECL on the weak_decls list at some point.
	     Replace it with the OLDDECL.  */
	  for (wd = weak_decls; wd; wd = TREE_CHAIN (wd))
	    if (TREE_VALUE (wd) == newdecl)
	      {
		TREE_VALUE (wd) = olddecl;
		break;
	      }
	  /* We may not find the entry on the list.  If NEWDECL is a
	     weak alias, then we will have already called
	     globalize_decl to remove the entry; in that case, we do
	     not need to do anything.  */
	}

      /* Make the OLDDECL weak; it's OLDDECL that we'll be keeping.  */
      mark_weak (olddecl);
    }
  else
    /* OLDDECL was weak, but NEWDECL was not explicitly marked as
       weak.  Just update NEWDECL to indicate that it's weak too.  */
    mark_weak (newdecl);
}

/* Declare DECL to be a weak symbol.  */

void
declare_weak (tree decl)
{
  gcc_assert (TREE_CODE (decl) != FUNCTION_DECL || !TREE_ASM_WRITTEN (decl));
  if (! TREE_PUBLIC (decl))
    {
      error ("weak declaration of %q+D must be public", decl);
      return;
    }
  else if (!TARGET_SUPPORTS_WEAK)
    warning (0, "weak declaration of %q+D not supported", decl);

  mark_weak (decl);
  if (!lookup_attribute ("weak", DECL_ATTRIBUTES (decl)))
    DECL_ATTRIBUTES (decl)
      = tree_cons (get_identifier ("weak"), NULL, DECL_ATTRIBUTES (decl));
}

static void
weak_finish_1 (tree decl)
{
#if defined (ASM_WEAKEN_DECL) || defined (ASM_WEAKEN_LABEL)
  const char *const name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
#endif

  if (! TREE_USED (decl))
    return;

#ifdef ASM_WEAKEN_DECL
  ASM_WEAKEN_DECL (asm_out_file, decl, name, NULL);
#else
#ifdef ASM_WEAKEN_LABEL
  ASM_WEAKEN_LABEL (asm_out_file, name);
#else
#ifdef ASM_OUTPUT_WEAK_ALIAS
  {
    static bool warn_once = 0;
    if (! warn_once)
      {
	warning (0, "only weak aliases are supported in this configuration");
	warn_once = 1;
      }
    return;
  }
#endif
#endif
#endif
}

/* Fiven an assembly name, find the decl it is associated with.  */
static tree
find_decl (tree target)
{
  symtab_node *node = symtab_node::get_for_asmname (target);
  if (node)
    return node->decl;
  return NULL_TREE;
}

/* This TREE_LIST contains weakref targets.  */

static GTY(()) tree weakref_targets;

/* Emit any pending weak declarations.  */

void
weak_finish (void)
{
  tree t;

  for (t = weakref_targets; t; t = TREE_CHAIN (t))
    {
      tree alias_decl = TREE_PURPOSE (t);
      tree target = ultimate_transparent_alias_target (&TREE_VALUE (t));

      if (! TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (alias_decl)))
	/* Remove alias_decl from the weak list, but leave entries for
	   the target alone.  */
	target = NULL_TREE;
#ifndef ASM_OUTPUT_WEAKREF
      else if (! TREE_SYMBOL_REFERENCED (target))
	{
	  /* Use ASM_WEAKEN_LABEL only if ASM_WEAKEN_DECL is not
	     defined, otherwise we and weak_finish_1 would use
	     different macros.  */
# if defined ASM_WEAKEN_LABEL && ! defined ASM_WEAKEN_DECL
	  ASM_WEAKEN_LABEL (asm_out_file, IDENTIFIER_POINTER (target));
# else
	  tree decl = find_decl (target);

	  if (! decl)
	    {
	      decl = build_decl (DECL_SOURCE_LOCATION (alias_decl),
				 TREE_CODE (alias_decl), target,
				 TREE_TYPE (alias_decl));

	      DECL_EXTERNAL (decl) = 1;
	      TREE_PUBLIC (decl) = 1;
	      DECL_ARTIFICIAL (decl) = 1;
	      TREE_NOTHROW (decl) = TREE_NOTHROW (alias_decl);
	      TREE_USED (decl) = 1;
	    }

	  weak_finish_1 (decl);
# endif
	}
#endif

      {
	tree *p;
	tree t2;

	/* Remove the alias and the target from the pending weak list
	   so that we do not emit any .weak directives for the former,
	   nor multiple .weak directives for the latter.  */
	for (p = &weak_decls; (t2 = *p) ; )
	  {
	    if (TREE_VALUE (t2) == alias_decl
		|| target == DECL_ASSEMBLER_NAME (TREE_VALUE (t2)))
	      *p = TREE_CHAIN (t2);
	    else
	      p = &TREE_CHAIN (t2);
	  }

	/* Remove other weakrefs to the same target, to speed things up.  */
	for (p = &TREE_CHAIN (t); (t2 = *p) ; )
	  {
	    if (target == ultimate_transparent_alias_target (&TREE_VALUE (t2)))
	      *p = TREE_CHAIN (t2);
	    else
	      p = &TREE_CHAIN (t2);
	  }
      }
    }

  for (t = weak_decls; t; t = TREE_CHAIN (t))
    {
      tree decl = TREE_VALUE (t);

      weak_finish_1 (decl);
    }
}

/* Emit the assembly bits to indicate that DECL is globally visible.  */

static void
globalize_decl (tree decl)
{

#if defined (ASM_WEAKEN_LABEL) || defined (ASM_WEAKEN_DECL)
  if (DECL_WEAK (decl))
    {
      const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
      tree *p, t;

#ifdef ASM_WEAKEN_DECL
      ASM_WEAKEN_DECL (asm_out_file, decl, name, 0);
#else
      ASM_WEAKEN_LABEL (asm_out_file, name);
#endif

      /* Remove this function from the pending weak list so that
	 we do not emit multiple .weak directives for it.  */
      for (p = &weak_decls; (t = *p) ; )
	{
	  if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t)))
	    *p = TREE_CHAIN (t);
	  else
	    p = &TREE_CHAIN (t);
	}

      /* Remove weakrefs to the same target from the pending weakref
	 list, for the same reason.  */
      for (p = &weakref_targets; (t = *p) ; )
	{
	  if (DECL_ASSEMBLER_NAME (decl)
	      == ultimate_transparent_alias_target (&TREE_VALUE (t)))
	    *p = TREE_CHAIN (t);
	  else
	    p = &TREE_CHAIN (t);
	}

      return;
    }
#endif

  targetm.asm_out.globalize_decl_name (asm_out_file, decl);
}

vec<alias_pair, va_gc> *alias_pairs;

/* Output the assembler code for a define (equate) using ASM_OUTPUT_DEF
   or ASM_OUTPUT_DEF_FROM_DECLS.  The function defines the symbol whose
   tree node is DECL to have the value of the tree node TARGET.  */

void
do_assemble_alias (tree decl, tree target)
{
  tree id;

  /* Emulated TLS had better not get this var.  */
  gcc_assert (!(!targetm.have_tls
		&& TREE_CODE (decl) == VAR_DECL
		&& DECL_THREAD_LOCAL_P (decl)));

  if (TREE_ASM_WRITTEN (decl))
    return;

  id = DECL_ASSEMBLER_NAME (decl);
  ultimate_transparent_alias_target (&id);
  ultimate_transparent_alias_target (&target);

  /* We must force creation of DECL_RTL for debug info generation, even though
     we don't use it here.  */
  make_decl_rtl (decl);

  TREE_ASM_WRITTEN (decl) = 1;
  TREE_ASM_WRITTEN (DECL_ASSEMBLER_NAME (decl)) = 1;
  TREE_ASM_WRITTEN (id) = 1;

  if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))
    {
      if (!TREE_SYMBOL_REFERENCED (target))
	weakref_targets = tree_cons (decl, target, weakref_targets);

#ifdef ASM_OUTPUT_WEAKREF
      ASM_OUTPUT_WEAKREF (asm_out_file, decl,
			  IDENTIFIER_POINTER (id),
			  IDENTIFIER_POINTER (target));
#else
      if (!TARGET_SUPPORTS_WEAK)
	{
	  error_at (DECL_SOURCE_LOCATION (decl),
		    "weakref is not supported in this configuration");
	  return;
	}
#endif
      return;
    }

#ifdef ASM_OUTPUT_DEF
  tree orig_decl = decl;

  if (TREE_CODE (decl) == FUNCTION_DECL
      && cgraph_node::get (decl)->instrumentation_clone
      && cgraph_node::get (decl)->instrumented_version)
    orig_decl = cgraph_node::get (decl)->instrumented_version->decl;

  /* Make name accessible from other files, if appropriate.  */

  if (TREE_PUBLIC (decl) || TREE_PUBLIC (orig_decl))
    {
      globalize_decl (decl);
      maybe_assemble_visibility (decl);
    }
  if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl)))
    {
#if defined (ASM_OUTPUT_TYPE_DIRECTIVE)
      if (targetm.has_ifunc_p ())
	ASM_OUTPUT_TYPE_DIRECTIVE
	  (asm_out_file, IDENTIFIER_POINTER (id),
	   IFUNC_ASM_TYPE);
      else
#endif
	error_at (DECL_SOURCE_LOCATION (decl),
		  "ifunc is not supported on this target");
    }

# ifdef ASM_OUTPUT_DEF_FROM_DECLS
  ASM_OUTPUT_DEF_FROM_DECLS (asm_out_file, decl, target);
# else
  ASM_OUTPUT_DEF (asm_out_file,
		  IDENTIFIER_POINTER (id),
		  IDENTIFIER_POINTER (target));
# endif
#elif defined (ASM_OUTPUT_WEAK_ALIAS) || defined (ASM_WEAKEN_DECL)
  {
    const char *name;
    tree *p, t;

    name = IDENTIFIER_POINTER (id);
# ifdef ASM_WEAKEN_DECL
    ASM_WEAKEN_DECL (asm_out_file, decl, name, IDENTIFIER_POINTER (target));
# else
    ASM_OUTPUT_WEAK_ALIAS (asm_out_file, name, IDENTIFIER_POINTER (target));
# endif
    /* Remove this function from the pending weak list so that
       we do not emit multiple .weak directives for it.  */
    for (p = &weak_decls; (t = *p) ; )
      if (DECL_ASSEMBLER_NAME (decl) == DECL_ASSEMBLER_NAME (TREE_VALUE (t))
	  || id == DECL_ASSEMBLER_NAME (TREE_VALUE (t)))
	*p = TREE_CHAIN (t);
      else
	p = &TREE_CHAIN (t);

    /* Remove weakrefs to the same target from the pending weakref
       list, for the same reason.  */
    for (p = &weakref_targets; (t = *p) ; )
      {
	if (id == ultimate_transparent_alias_target (&TREE_VALUE (t)))
	  *p = TREE_CHAIN (t);
	else
	  p = &TREE_CHAIN (t);
      }
  }
#endif
}

/* Emit an assembler directive to make the symbol for DECL an alias to
   the symbol for TARGET.  */

void
assemble_alias (tree decl, tree target)
{
  tree target_decl;

  if (lookup_attribute ("weakref", DECL_ATTRIBUTES (decl)))
    {
      tree alias = DECL_ASSEMBLER_NAME (decl);

      ultimate_transparent_alias_target (&target);

      if (alias == target)
	error ("weakref %q+D ultimately targets itself", decl);
      if (TREE_PUBLIC (decl))
	error ("weakref %q+D must have static linkage", decl);
    }
  else
    {
#if !defined (ASM_OUTPUT_DEF)
# if !defined(ASM_OUTPUT_WEAK_ALIAS) && !defined (ASM_WEAKEN_DECL)
      error_at (DECL_SOURCE_LOCATION (decl),
		"alias definitions not supported in this configuration");
      TREE_ASM_WRITTEN (decl) = 1;
      return;
# else
      if (!DECL_WEAK (decl))
	{
	  if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl)))
	    error_at (DECL_SOURCE_LOCATION (decl),
		      "ifunc is not supported in this configuration");
	  else
	    error_at (DECL_SOURCE_LOCATION (decl),
		      "only weak aliases are supported in this configuration");
	  TREE_ASM_WRITTEN (decl) = 1;
	  return;
	}
# endif
#endif
    }
  TREE_USED (decl) = 1;

  /* Allow aliases to aliases.  */
  if (TREE_CODE (decl) == FUNCTION_DECL)
    cgraph_node::get_create (decl)->alias = true;
  else
    varpool_node::get_create (decl)->alias = true;

  /* If the target has already been emitted, we don't have to queue the
     alias.  This saves a tad of memory.  */
  if (symtab->global_info_ready)
    target_decl = find_decl (target);
  else
    target_decl= NULL;
  if ((target_decl && TREE_ASM_WRITTEN (target_decl))
      || symtab->state >= EXPANSION)
    do_assemble_alias (decl, target);
  else
    {
      alias_pair p = {decl, target};
      vec_safe_push (alias_pairs, p);
    }
}

/* Record and output a table of translations from original function
   to its transaction aware clone.  Note that tm_pure functions are
   considered to be their own clone.  */

struct tm_clone_hasher : ggc_cache_ptr_hash<tree_map>
{
  static hashval_t hash (tree_map *m) { return tree_map_hash (m); }
  static bool equal (tree_map *a, tree_map *b) { return tree_map_eq (a, b); }

  static int
  keep_cache_entry (tree_map *&e)
  {
    return ggc_marked_p (e->base.from);
  }
};

static GTY((cache)) hash_table<tm_clone_hasher> *tm_clone_hash;

void
record_tm_clone_pair (tree o, tree n)
{
  struct tree_map **slot, *h;

  if (tm_clone_hash == NULL)
    tm_clone_hash = hash_table<tm_clone_hasher>::create_ggc (32);

  h = ggc_alloc<tree_map> ();
  h->hash = htab_hash_pointer (o);
  h->base.from = o;
  h->to = n;

  slot = tm_clone_hash->find_slot_with_hash (h, h->hash, INSERT);
  *slot = h;
}

tree
get_tm_clone_pair (tree o)
{
  if (tm_clone_hash)
    {
      struct tree_map *h, in;

      in.base.from = o;
      in.hash = htab_hash_pointer (o);
      h = tm_clone_hash->find_with_hash (&in, in.hash);
      if (h)
	return h->to;
    }
  return NULL_TREE;
}

struct tm_alias_pair
{
  unsigned int uid;
  tree from;
  tree to;
};


/* Dump the actual pairs to the .tm_clone_table section.  */

static void
dump_tm_clone_pairs (vec<tm_alias_pair> tm_alias_pairs)
{
  unsigned i;
  tm_alias_pair *p;
  bool switched = false;

  FOR_EACH_VEC_ELT (tm_alias_pairs, i, p)
    {
      tree src = p->from;
      tree dst = p->to;
      struct cgraph_node *src_n = cgraph_node::get (src);
      struct cgraph_node *dst_n = cgraph_node::get (dst);

      /* The function ipa_tm_create_version() marks the clone as needed if
	 the original function was needed.  But we also mark the clone as
	 needed if we ever called the clone indirectly through
	 TM_GETTMCLONE.  If neither of these are true, we didn't generate
	 a clone, and we didn't call it indirectly... no sense keeping it
	 in the clone table.  */
      if (!dst_n || !dst_n->definition)
	continue;

      /* This covers the case where we have optimized the original
	 function away, and only access the transactional clone.  */
      if (!src_n || !src_n->definition)
	continue;

      if (!switched)
	{
	  switch_to_section (targetm.asm_out.tm_clone_table_section ());
	  assemble_align (POINTER_SIZE);
	  switched = true;
	}

      assemble_integer (XEXP (DECL_RTL (src), 0),
			POINTER_SIZE_UNITS, POINTER_SIZE, 1);
      assemble_integer (XEXP (DECL_RTL (dst), 0),
			POINTER_SIZE_UNITS, POINTER_SIZE, 1);
    }
}

/* Provide a default for the tm_clone_table section.  */

section *
default_clone_table_section (void)
{
  return get_named_section (NULL, ".tm_clone_table", 3);
}

/* Helper comparison function for qsorting by the DECL_UID stored in
   alias_pair->emitted_diags.  */

static int
tm_alias_pair_cmp (const void *x, const void *y)
{
  const tm_alias_pair *p1 = (const tm_alias_pair *) x;
  const tm_alias_pair *p2 = (const tm_alias_pair *) y;
  if (p1->uid < p2->uid)
    return -1;
  if (p1->uid > p2->uid)
    return 1;
  return 0;
}

void
finish_tm_clone_pairs (void)
{
  vec<tm_alias_pair> tm_alias_pairs = vNULL;

  if (tm_clone_hash == NULL)
    return;

  /* We need a determenistic order for the .tm_clone_table, otherwise
     we will get bootstrap comparison failures, so dump the hash table
     to a vector, sort it, and dump the vector.  */

  /* Dump the hashtable to a vector.  */
  tree_map *map;
  hash_table<tm_clone_hasher>::iterator iter;
  FOR_EACH_HASH_TABLE_ELEMENT (*tm_clone_hash, map, tree_map *, iter)
    {
      tm_alias_pair p = {DECL_UID (map->base.from), map->base.from, map->to};
      tm_alias_pairs.safe_push (p);
    }
  /* Sort it.  */
  tm_alias_pairs.qsort (tm_alias_pair_cmp);

  /* Dump it.  */
  dump_tm_clone_pairs (tm_alias_pairs);

  tm_clone_hash->empty ();
  tm_clone_hash = NULL;
  tm_alias_pairs.release ();
}


/* Emit an assembler directive to set symbol for DECL visibility to
   the visibility type VIS, which must not be VISIBILITY_DEFAULT.  */

void
default_assemble_visibility (tree decl ATTRIBUTE_UNUSED,
			     int vis ATTRIBUTE_UNUSED)
{
#ifdef HAVE_GAS_HIDDEN
  static const char * const visibility_types[] = {
    NULL, "protected", "hidden", "internal"
  };

  const char *name, *type;
  tree id;

  id = DECL_ASSEMBLER_NAME (decl);
  ultimate_transparent_alias_target (&id);
  name = IDENTIFIER_POINTER (id);

  type = visibility_types[vis];

  fprintf (asm_out_file, "\t.%s\t", type);
  assemble_name (asm_out_file, name);
  fprintf (asm_out_file, "\n");
#else
  if (!DECL_ARTIFICIAL (decl))
    warning (OPT_Wattributes, "visibility attribute not supported "
	     "in this configuration; ignored");
#endif
}

/* A helper function to call assemble_visibility when needed for a decl.  */

int
maybe_assemble_visibility (tree decl)
{
  enum symbol_visibility vis = DECL_VISIBILITY (decl);

  if (TREE_CODE (decl) == FUNCTION_DECL
      && cgraph_node::get (decl)
      && cgraph_node::get (decl)->instrumentation_clone
      && cgraph_node::get (decl)->instrumented_version)
    vis = DECL_VISIBILITY (cgraph_node::get (decl)->instrumented_version->decl);

  if (vis != VISIBILITY_DEFAULT)
    {
      targetm.asm_out.assemble_visibility (decl, vis);
      return 1;
    }
  else
    return 0;
}

/* Returns 1 if the target configuration supports defining public symbols
   so that one of them will be chosen at link time instead of generating a
   multiply-defined symbol error, whether through the use of weak symbols or
   a target-specific mechanism for having duplicates discarded.  */

int
supports_one_only (void)
{
  if (SUPPORTS_ONE_ONLY)
    return 1;
  return TARGET_SUPPORTS_WEAK;
}

/* Set up DECL as a public symbol that can be defined in multiple
   translation units without generating a linker error.  */

void
make_decl_one_only (tree decl, tree comdat_group)
{
  struct symtab_node *symbol;
  gcc_assert (TREE_CODE (decl) == VAR_DECL
	      || TREE_CODE (decl) == FUNCTION_DECL);

  TREE_PUBLIC (decl) = 1;

  if (TREE_CODE (decl) == VAR_DECL)
    symbol = varpool_node::get_create (decl);
  else
    symbol = cgraph_node::get_create (decl);

  if (SUPPORTS_ONE_ONLY)
    {
#ifdef MAKE_DECL_ONE_ONLY
      MAKE_DECL_ONE_ONLY (decl);
#endif
      symbol->set_comdat_group (comdat_group);
    }
  else if (TREE_CODE (decl) == VAR_DECL
           && (DECL_INITIAL (decl) == 0
	       || (!in_lto_p && DECL_INITIAL (decl) == error_mark_node)))
    DECL_COMMON (decl) = 1;
  else
    {
      gcc_assert (TARGET_SUPPORTS_WEAK);
      DECL_WEAK (decl) = 1;
    }
}

void
init_varasm_once (void)
{
  section_htab = hash_table<section_hasher>::create_ggc (31);
  object_block_htab = hash_table<object_block_hasher>::create_ggc (31);
  const_desc_htab = hash_table<tree_descriptor_hasher>::create_ggc (1009);

  shared_constant_pool = create_constant_pool ();

#ifdef TEXT_SECTION_ASM_OP
  text_section = get_unnamed_section (SECTION_CODE, output_section_asm_op,
				      TEXT_SECTION_ASM_OP);
#endif

#ifdef DATA_SECTION_ASM_OP
  data_section = get_unnamed_section (SECTION_WRITE, output_section_asm_op,
				      DATA_SECTION_ASM_OP);
#endif

#ifdef SDATA_SECTION_ASM_OP
  sdata_section = get_unnamed_section (SECTION_WRITE, output_section_asm_op,
				       SDATA_SECTION_ASM_OP);
#endif

#ifdef READONLY_DATA_SECTION_ASM_OP
  readonly_data_section = get_unnamed_section (0, output_section_asm_op,
					       READONLY_DATA_SECTION_ASM_OP);
#endif

#ifdef CTORS_SECTION_ASM_OP
  ctors_section = get_unnamed_section (0, output_section_asm_op,
				       CTORS_SECTION_ASM_OP);
#endif

#ifdef DTORS_SECTION_ASM_OP
  dtors_section = get_unnamed_section (0, output_section_asm_op,
				       DTORS_SECTION_ASM_OP);
#endif

#ifdef BSS_SECTION_ASM_OP
  bss_section = get_unnamed_section (SECTION_WRITE | SECTION_BSS,
				     output_section_asm_op,
				     BSS_SECTION_ASM_OP);
#endif

#ifdef SBSS_SECTION_ASM_OP
  sbss_section = get_unnamed_section (SECTION_WRITE | SECTION_BSS,
				      output_section_asm_op,
				      SBSS_SECTION_ASM_OP);
#endif

  tls_comm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
					   | SECTION_COMMON, emit_tls_common);
  lcomm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
					| SECTION_COMMON, emit_local);
  comm_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS
				       | SECTION_COMMON, emit_common);

#if defined ASM_OUTPUT_ALIGNED_BSS
  bss_noswitch_section = get_noswitch_section (SECTION_WRITE | SECTION_BSS,
					       emit_bss);
#endif

  targetm.asm_out.init_sections ();

  if (readonly_data_section == NULL)
    readonly_data_section = text_section;

#ifdef ASM_OUTPUT_EXTERNAL
  pending_assemble_externals_set = new hash_set<tree>;
#endif
}

enum tls_model
decl_default_tls_model (const_tree decl)
{
  enum tls_model kind;
  bool is_local;

  is_local = targetm.binds_local_p (decl);
  if (!flag_shlib)
    {
      if (is_local)
	kind = TLS_MODEL_LOCAL_EXEC;
      else
	kind = TLS_MODEL_INITIAL_EXEC;
    }

  /* Local dynamic is inefficient when we're not combining the
     parts of the address.  */
  else if (optimize && is_local)
    kind = TLS_MODEL_LOCAL_DYNAMIC;
  else
    kind = TLS_MODEL_GLOBAL_DYNAMIC;
  if (kind < flag_tls_default)
    kind = flag_tls_default;

  return kind;
}

/* Select a set of attributes for section NAME based on the properties
   of DECL and whether or not RELOC indicates that DECL's initializer
   might contain runtime relocations.

   We make the section read-only and executable for a function decl,
   read-only for a const data decl, and writable for a non-const data decl.  */

unsigned int
default_section_type_flags (tree decl, const char *name, int reloc)
{
  unsigned int flags;

  if (decl && TREE_CODE (decl) == FUNCTION_DECL)
    flags = SECTION_CODE;
  else if (decl)
    {
      enum section_category category
	= categorize_decl_for_section (decl, reloc);
      if (decl_readonly_section_1 (category))
	flags = 0;
      else if (category == SECCAT_DATA_REL_RO
	       || category == SECCAT_DATA_REL_RO_LOCAL)
	flags = SECTION_WRITE | SECTION_RELRO;
      else
	flags = SECTION_WRITE;
    }
  else
    {
      flags = SECTION_WRITE;
      if (strcmp (name, ".data.rel.ro") == 0
	  || strcmp (name, ".data.rel.ro.local") == 0)
	flags |= SECTION_RELRO;
    }

  if (decl && DECL_P (decl) && DECL_COMDAT_GROUP (decl))
    flags |= SECTION_LINKONCE;

  if (strcmp (name, ".vtable_map_vars") == 0)
    flags |= SECTION_LINKONCE;

  if (decl && TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
    flags |= SECTION_TLS | SECTION_WRITE;

  if (strcmp (name, ".bss") == 0
      || strncmp (name, ".bss.", 5) == 0
      || strncmp (name, ".gnu.linkonce.b.", 16) == 0
      || strcmp (name, ".persistent.bss") == 0
      || strcmp (name, ".sbss") == 0
      || strncmp (name, ".sbss.", 6) == 0
      || strncmp (name, ".gnu.linkonce.sb.", 17) == 0)
    flags |= SECTION_BSS;

  if (strcmp (name, ".tdata") == 0
      || strncmp (name, ".tdata.", 7) == 0
      || strncmp (name, ".gnu.linkonce.td.", 17) == 0)
    flags |= SECTION_TLS;

  if (strcmp (name, ".tbss") == 0
      || strncmp (name, ".tbss.", 6) == 0
      || strncmp (name, ".gnu.linkonce.tb.", 17) == 0)
    flags |= SECTION_TLS | SECTION_BSS;

  /* These three sections have special ELF types.  They are neither
     SHT_PROGBITS nor SHT_NOBITS, so when changing sections we don't
     want to print a section type (@progbits or @nobits).  If someone
     is silly enough to emit code or TLS variables to one of these
     sections, then don't handle them specially.  */
  if (!(flags & (SECTION_CODE | SECTION_BSS | SECTION_TLS))
      && (strcmp (name, ".init_array") == 0
	  || strcmp (name, ".fini_array") == 0
	  || strcmp (name, ".preinit_array") == 0))
    flags |= SECTION_NOTYPE;

  return flags;
}

/* Return true if the target supports some form of global BSS,
   either through bss_noswitch_section, or by selecting a BSS
   section in TARGET_ASM_SELECT_SECTION.  */

bool
have_global_bss_p (void)
{
  return bss_noswitch_section || targetm.have_switchable_bss_sections;
}

/* Output assembly to switch to section NAME with attribute FLAGS.
   Four variants for common object file formats.  */

void
default_no_named_section (const char *name ATTRIBUTE_UNUSED,
			  unsigned int flags ATTRIBUTE_UNUSED,
			  tree decl ATTRIBUTE_UNUSED)
{
  /* Some object formats don't support named sections at all.  The
     front-end should already have flagged this as an error.  */
  gcc_unreachable ();
}

#ifndef TLS_SECTION_ASM_FLAG
#define TLS_SECTION_ASM_FLAG 'T'
#endif

void
default_elf_asm_named_section (const char *name, unsigned int flags,
			       tree decl)
{
  char flagchars[10], *f = flagchars;

  /* If we have already declared this section, we can use an
     abbreviated form to switch back to it -- unless this section is
     part of a COMDAT groups, in which case GAS requires the full
     declaration every time.  */
  if (!(HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
      && (flags & SECTION_DECLARED))
    {
      fprintf (asm_out_file, "\t.section\t%s\n", name);
      return;
    }

  if (!(flags & SECTION_DEBUG))
    *f++ = 'a';
#if defined (HAVE_GAS_SECTION_EXCLUDE) && HAVE_GAS_SECTION_EXCLUDE == 1
  if (flags & SECTION_EXCLUDE)
    *f++ = 'e';
#endif
  if (flags & SECTION_WRITE)
    *f++ = 'w';
  if (flags & SECTION_CODE)
    *f++ = 'x';
  if (flags & SECTION_SMALL)
    *f++ = 's';
  if (flags & SECTION_MERGE)
    *f++ = 'M';
  if (flags & SECTION_STRINGS)
    *f++ = 'S';
  if (flags & SECTION_TLS)
    *f++ = TLS_SECTION_ASM_FLAG;
  if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
    *f++ = 'G';
  *f = '\0';

  fprintf (asm_out_file, "\t.section\t%s,\"%s\"", name, flagchars);

  if (!(flags & SECTION_NOTYPE))
    {
      const char *type;
      const char *format;

      if (flags & SECTION_BSS)
	type = "nobits";
      else
	type = "progbits";

      format = ",@%s";
      /* On platforms that use "@" as the assembly comment character,
	 use "%" instead.  */
      if (strcmp (ASM_COMMENT_START, "@") == 0)
	format = ",%%%s";
      fprintf (asm_out_file, format, type);

      if (flags & SECTION_ENTSIZE)
	fprintf (asm_out_file, ",%d", flags & SECTION_ENTSIZE);
      if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
	{
	  if (TREE_CODE (decl) == IDENTIFIER_NODE)
	    fprintf (asm_out_file, ",%s,comdat", IDENTIFIER_POINTER (decl));
	  else
	    fprintf (asm_out_file, ",%s,comdat",
		     IDENTIFIER_POINTER (DECL_COMDAT_GROUP (decl)));
	}
    }

  putc ('\n', asm_out_file);
}

void
default_coff_asm_named_section (const char *name, unsigned int flags,
				tree decl ATTRIBUTE_UNUSED)
{
  char flagchars[8], *f = flagchars;

  if (flags & SECTION_WRITE)
    *f++ = 'w';
  if (flags & SECTION_CODE)
    *f++ = 'x';
  *f = '\0';

  fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars);
}

void
default_pe_asm_named_section (const char *name, unsigned int flags,
			      tree decl)
{
  default_coff_asm_named_section (name, flags, decl);

  if (flags & SECTION_LINKONCE)
    {
      /* Functions may have been compiled at various levels of
         optimization so we can't use `same_size' here.
         Instead, have the linker pick one.  */
      fprintf (asm_out_file, "\t.linkonce %s\n",
	       (flags & SECTION_CODE ? "discard" : "same_size"));
    }
}

/* The lame default section selector.  */

section *
default_select_section (tree decl, int reloc,
			unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
{
  if (DECL_P (decl))
    {
      if (decl_readonly_section (decl, reloc))
	return readonly_data_section;
    }
  else if (TREE_CODE (decl) == CONSTRUCTOR)
    {
      if (! ((flag_pic && reloc)
	     || !TREE_READONLY (decl)
	     || TREE_SIDE_EFFECTS (decl)
	     || !TREE_CONSTANT (decl)))
	return readonly_data_section;
    }
  else if (TREE_CODE (decl) == STRING_CST)
    return readonly_data_section;
  else if (! (flag_pic && reloc))
    return readonly_data_section;

  return data_section;
}

enum section_category
categorize_decl_for_section (const_tree decl, int reloc)
{
  enum section_category ret;

  if (TREE_CODE (decl) == FUNCTION_DECL)
    return SECCAT_TEXT;
  else if (TREE_CODE (decl) == STRING_CST)
    {
      if ((flag_sanitize & SANITIZE_ADDRESS)
	  && asan_protect_global (CONST_CAST_TREE (decl)))
      /* or !flag_merge_constants */
        return SECCAT_RODATA;
      else
	return SECCAT_RODATA_MERGE_STR;
    }
  else if (TREE_CODE (decl) == VAR_DECL)
    {
      if (bss_initializer_p (decl))
	ret = SECCAT_BSS;
      else if (! TREE_READONLY (decl)
	       || TREE_SIDE_EFFECTS (decl)
	       || ! TREE_CONSTANT (DECL_INITIAL (decl)))
	{
	  /* Here the reloc_rw_mask is not testing whether the section should
	     be read-only or not, but whether the dynamic link will have to
	     do something.  If so, we wish to segregate the data in order to
	     minimize cache misses inside the dynamic linker.  */
	  if (reloc & targetm.asm_out.reloc_rw_mask ())
	    ret = reloc == 1 ? SECCAT_DATA_REL_LOCAL : SECCAT_DATA_REL;
	  else
	    ret = SECCAT_DATA;
	}
      else if (reloc & targetm.asm_out.reloc_rw_mask ())
	ret = reloc == 1 ? SECCAT_DATA_REL_RO_LOCAL : SECCAT_DATA_REL_RO;
      else if (reloc || flag_merge_constants < 2
	       || ((flag_sanitize & SANITIZE_ADDRESS)
		   && asan_protect_global (CONST_CAST_TREE (decl))))
	/* C and C++ don't allow different variables to share the same
	   location.  -fmerge-all-constants allows even that (at the
	   expense of not conforming).  */
	ret = SECCAT_RODATA;
      else if (TREE_CODE (DECL_INITIAL (decl)) == STRING_CST)
	ret = SECCAT_RODATA_MERGE_STR_INIT;
      else
	ret = SECCAT_RODATA_MERGE_CONST;
    }
  else if (TREE_CODE (decl) == CONSTRUCTOR)
    {
      if ((reloc & targetm.asm_out.reloc_rw_mask ())
	  || TREE_SIDE_EFFECTS (decl)
	  || ! TREE_CONSTANT (decl))
	ret = SECCAT_DATA;
      else
	ret = SECCAT_RODATA;
    }
  else
    ret = SECCAT_RODATA;

  /* There are no read-only thread-local sections.  */
  if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
    {
      /* Note that this would be *just* SECCAT_BSS, except that there's
	 no concept of a read-only thread-local-data section.  */
      if (ret == SECCAT_BSS
	       || (flag_zero_initialized_in_bss
		   && initializer_zerop (DECL_INITIAL (decl))))
	ret = SECCAT_TBSS;
      else
	ret = SECCAT_TDATA;
    }

  /* If the target uses small data sections, select it.  */
  else if (targetm.in_small_data_p (decl))
    {
      if (ret == SECCAT_BSS)
	ret = SECCAT_SBSS;
      else if (targetm.have_srodata_section && ret == SECCAT_RODATA)
	ret = SECCAT_SRODATA;
      else
	ret = SECCAT_SDATA;
    }

  return ret;
}

static bool
decl_readonly_section_1 (enum section_category category)
{
  switch (category)
    {
    case SECCAT_RODATA:
    case SECCAT_RODATA_MERGE_STR:
    case SECCAT_RODATA_MERGE_STR_INIT:
    case SECCAT_RODATA_MERGE_CONST:
    case SECCAT_SRODATA:
      return true;
    default:
      return false;
    }
}

bool
decl_readonly_section (const_tree decl, int reloc)
{
  return decl_readonly_section_1 (categorize_decl_for_section (decl, reloc));
}

/* Select a section based on the above categorization.  */

section *
default_elf_select_section (tree decl, int reloc,
			    unsigned HOST_WIDE_INT align)
{
  const char *sname;
  switch (categorize_decl_for_section (decl, reloc))
    {
    case SECCAT_TEXT:
      /* We're not supposed to be called on FUNCTION_DECLs.  */
      gcc_unreachable ();
    case SECCAT_RODATA:
      return readonly_data_section;
    case SECCAT_RODATA_MERGE_STR:
      return mergeable_string_section (decl, align, 0);
    case SECCAT_RODATA_MERGE_STR_INIT:
      return mergeable_string_section (DECL_INITIAL (decl), align, 0);
    case SECCAT_RODATA_MERGE_CONST:
      return mergeable_constant_section (DECL_MODE (decl), align, 0);
    case SECCAT_SRODATA:
      sname = ".sdata2";
      break;
    case SECCAT_DATA:
      return data_section;
    case SECCAT_DATA_REL:
      sname = ".data.rel";
      break;
    case SECCAT_DATA_REL_LOCAL:
      sname = ".data.rel.local";
      break;
    case SECCAT_DATA_REL_RO:
      sname = ".data.rel.ro";
      break;
    case SECCAT_DATA_REL_RO_LOCAL:
      sname = ".data.rel.ro.local";
      break;
    case SECCAT_SDATA:
      sname = ".sdata";
      break;
    case SECCAT_TDATA:
      sname = ".tdata";
      break;
    case SECCAT_BSS:
      if (bss_section)
	return bss_section;
      sname = ".bss";
      break;
    case SECCAT_SBSS:
      sname = ".sbss";
      break;
    case SECCAT_TBSS:
      sname = ".tbss";
      break;
    default:
      gcc_unreachable ();
    }

  return get_named_section (decl, sname, reloc);
}

/* Construct a unique section name based on the decl name and the
   categorization performed above.  */

void
default_unique_section (tree decl, int reloc)
{
  /* We only need to use .gnu.linkonce if we don't have COMDAT groups.  */
  bool one_only = DECL_ONE_ONLY (decl) && !HAVE_COMDAT_GROUP;
  const char *prefix, *name, *linkonce;
  char *string;
  tree id;

  switch (categorize_decl_for_section (decl, reloc))
    {
    case SECCAT_TEXT:
      prefix = one_only ? ".t" : ".text";
      break;
    case SECCAT_RODATA:
    case SECCAT_RODATA_MERGE_STR:
    case SECCAT_RODATA_MERGE_STR_INIT:
    case SECCAT_RODATA_MERGE_CONST:
      prefix = one_only ? ".r" : ".rodata";
      break;
    case SECCAT_SRODATA:
      prefix = one_only ? ".s2" : ".sdata2";
      break;
    case SECCAT_DATA:
      prefix = one_only ? ".d" : ".data";
      break;
    case SECCAT_DATA_REL:
      prefix = one_only ? ".d.rel" : ".data.rel";
      break;
    case SECCAT_DATA_REL_LOCAL:
      prefix = one_only ? ".d.rel.local" : ".data.rel.local";
      break;
    case SECCAT_DATA_REL_RO:
      prefix = one_only ? ".d.rel.ro" : ".data.rel.ro";
      break;
    case SECCAT_DATA_REL_RO_LOCAL:
      prefix = one_only ? ".d.rel.ro.local" : ".data.rel.ro.local";
      break;
    case SECCAT_SDATA:
      prefix = one_only ? ".s" : ".sdata";
      break;
    case SECCAT_BSS:
      prefix = one_only ? ".b" : ".bss";
      break;
    case SECCAT_SBSS:
      prefix = one_only ? ".sb" : ".sbss";
      break;
    case SECCAT_TDATA:
      prefix = one_only ? ".td" : ".tdata";
      break;
    case SECCAT_TBSS:
      prefix = one_only ? ".tb" : ".tbss";
      break;
    default:
      gcc_unreachable ();
    }

  id = DECL_ASSEMBLER_NAME (decl);
  ultimate_transparent_alias_target (&id);
  name = IDENTIFIER_POINTER (id);
  name = targetm.strip_name_encoding (name);

  /* If we're using one_only, then there needs to be a .gnu.linkonce
     prefix to the section name.  */
  linkonce = one_only ? ".gnu.linkonce" : "";

  string = ACONCAT ((linkonce, prefix, ".", name, NULL));

  set_decl_section_name (decl, string);
}

/* Subroutine of compute_reloc_for_rtx for leaf rtxes.  */

static int
compute_reloc_for_rtx_1 (const_rtx x)
{
  switch (GET_CODE (x))
    {
    case SYMBOL_REF:
      return SYMBOL_REF_LOCAL_P (x) ? 1 : 2;
    case LABEL_REF:
      return 1;
    default:
      return 0;
    }
}

/* Like compute_reloc_for_constant, except for an RTX.  The return value
   is a mask for which bit 1 indicates a global relocation, and bit 0
   indicates a local relocation.  */

static int
compute_reloc_for_rtx (const_rtx x)
{
  switch (GET_CODE (x))
    {
    case SYMBOL_REF:
    case LABEL_REF:
      return compute_reloc_for_rtx_1 (x);

    case CONST:
      {
	int reloc = 0;
	subrtx_iterator::array_type array;
	FOR_EACH_SUBRTX (iter, array, x, ALL)
	  reloc |= compute_reloc_for_rtx_1 (*iter);
	return reloc;
      }

    default:
      return 0;
    }
}

section *
default_select_rtx_section (machine_mode mode ATTRIBUTE_UNUSED,
			    rtx x,
			    unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED)
{
  if (compute_reloc_for_rtx (x) & targetm.asm_out.reloc_rw_mask ())
    return data_section;
  else
    return readonly_data_section;
}

section *
default_elf_select_rtx_section (machine_mode mode, rtx x,
				unsigned HOST_WIDE_INT align)
{
  int reloc = compute_reloc_for_rtx (x);

  /* ??? Handle small data here somehow.  */

  if (reloc & targetm.asm_out.reloc_rw_mask ())
    {
      if (reloc == 1)
	return get_named_section (NULL, ".data.rel.ro.local", 1);
      else
	return get_named_section (NULL, ".data.rel.ro", 3);
    }

  return mergeable_constant_section (mode, align, 0);
}

/* Set the generally applicable flags on the SYMBOL_REF for EXP.  */

void
default_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED)
{
  rtx symbol;
  int flags;

  /* Careful not to prod global register variables.  */
  if (!MEM_P (rtl))
    return;
  symbol = XEXP (rtl, 0);
  if (GET_CODE (symbol) != SYMBOL_REF)
    return;

  flags = SYMBOL_REF_FLAGS (symbol) & SYMBOL_FLAG_HAS_BLOCK_INFO;
  if (TREE_CODE (decl) == FUNCTION_DECL)
    flags |= SYMBOL_FLAG_FUNCTION;
  if (targetm.binds_local_p (decl))
    flags |= SYMBOL_FLAG_LOCAL;
  if (TREE_CODE (decl) == VAR_DECL && DECL_THREAD_LOCAL_P (decl))
    flags |= DECL_TLS_MODEL (decl) << SYMBOL_FLAG_TLS_SHIFT;
  else if (targetm.in_small_data_p (decl))
    flags |= SYMBOL_FLAG_SMALL;
  /* ??? Why is DECL_EXTERNAL ever set for non-PUBLIC names?  Without
     being PUBLIC, the thing *must* be defined in this translation unit.
     Prevent this buglet from being propagated into rtl code as well.  */
  if (DECL_P (decl) && DECL_EXTERNAL (decl) && TREE_PUBLIC (decl))
    flags |= SYMBOL_FLAG_EXTERNAL;

  SYMBOL_REF_FLAGS (symbol) = flags;
}

/* By default, we do nothing for encode_section_info, so we need not
   do anything but discard the '*' marker.  */

const char *
default_strip_name_encoding (const char *str)
{
  return str + (*str == '*');
}

#ifdef ASM_OUTPUT_DEF
/* The default implementation of TARGET_ASM_OUTPUT_ANCHOR.  Define the
   anchor relative to ".", the current section position.  */

void
default_asm_output_anchor (rtx symbol)
{
  char buffer[100];

  sprintf (buffer, "*. + " HOST_WIDE_INT_PRINT_DEC,
	   SYMBOL_REF_BLOCK_OFFSET (symbol));
  ASM_OUTPUT_DEF (asm_out_file, XSTR (symbol, 0), buffer);
}
#endif

/* The default implementation of TARGET_USE_ANCHORS_FOR_SYMBOL_P.  */

bool
default_use_anchors_for_symbol_p (const_rtx symbol)
{
  section *sect;
  tree decl;

  /* Don't use anchors for mergeable sections.  The linker might move
     the objects around.  */
  sect = SYMBOL_REF_BLOCK (symbol)->sect;
  if (sect->common.flags & SECTION_MERGE)
    return false;

  /* Don't use anchors for small data sections.  The small data register
     acts as an anchor for such sections.  */
  if (sect->common.flags & SECTION_SMALL)
    return false;

  decl = SYMBOL_REF_DECL (symbol);
  if (decl && DECL_P (decl))
    {
      /* Don't use section anchors for decls that might be defined or
	 usurped by other modules.  */
      if (TREE_PUBLIC (decl) && !decl_binds_to_current_def_p (decl))
	return false;

      /* Don't use section anchors for decls that will be placed in a
	 small data section.  */
      /* ??? Ideally, this check would be redundant with the SECTION_SMALL
	 one above.  The problem is that we only use SECTION_SMALL for
	 sections that should be marked as small in the section directive.  */
      if (targetm.in_small_data_p (decl))
	return false;
    }
  return true;
}

/* Return true when RESOLUTION indicate that symbol will be bound to the
   definition provided by current .o file.  */

static bool
resolution_to_local_definition_p (enum ld_plugin_symbol_resolution resolution)
{
  return (resolution == LDPR_PREVAILING_DEF
	  || resolution == LDPR_PREVAILING_DEF_IRONLY_EXP
	  || resolution == LDPR_PREVAILING_DEF_IRONLY);
}

/* Return true when RESOLUTION indicate that symbol will be bound locally
   within current executable or DSO.  */

static bool
resolution_local_p (enum ld_plugin_symbol_resolution resolution)
{
  return (resolution == LDPR_PREVAILING_DEF
	  || resolution == LDPR_PREVAILING_DEF_IRONLY
	  || resolution == LDPR_PREVAILING_DEF_IRONLY_EXP
	  || resolution == LDPR_PREEMPTED_REG
	  || resolution == LDPR_PREEMPTED_IR
	  || resolution == LDPR_RESOLVED_IR
	  || resolution == LDPR_RESOLVED_EXEC);
}

/* COMMON_LOCAL_P is true means that the linker can guarantee that an
   uninitialized common symbol in the executable will still be defined
   (through COPY relocation) in the executable.  */

bool
default_binds_local_p_3 (const_tree exp, bool shlib, bool weak_dominate,
			 bool extern_protected_data, bool common_local_p)
{
  /* A non-decl is an entry in the constant pool.  */
  if (!DECL_P (exp))
    return true;

  /* Weakrefs may not bind locally, even though the weakref itself is always
     static and therefore local.  Similarly, the resolver for ifunc functions
     might resolve to a non-local function.
     FIXME: We can resolve the weakref case more curefuly by looking at the
     weakref alias.  */
  if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp))
	   || (TREE_CODE (exp) == FUNCTION_DECL
	       && lookup_attribute ("ifunc", DECL_ATTRIBUTES (exp))))
    return false;

  /* Static variables are always local.  */
  if (! TREE_PUBLIC (exp))
    return true;

  /* With resolution file in hand, take look into resolutions.
     We can't just return true for resolved_locally symbols,
     because dynamic linking might overwrite symbols
     in shared libraries.  */
  bool resolved_locally = false;

  bool uninited_common = (DECL_COMMON (exp)
			  && (DECL_INITIAL (exp) == NULL
			      || (!in_lto_p
				  && DECL_INITIAL (exp) == error_mark_node)));

  /* A non-external variable is defined locally only if it isn't
     uninitialized COMMON variable or common_local_p is true.  */
  bool defined_locally = (!DECL_EXTERNAL (exp)
			  && (!uninited_common || common_local_p));
  if (symtab_node *node = symtab_node::get (exp))
    {
      if (node->in_other_partition)
	defined_locally = true;
      if (resolution_to_local_definition_p (node->resolution))
	defined_locally = resolved_locally = true;
      else if (resolution_local_p (node->resolution))
	resolved_locally = true;
    }
  if (defined_locally && weak_dominate && !shlib)
    resolved_locally = true;

  /* Undefined weak symbols are never defined locally.  */
  if (DECL_WEAK (exp) && !defined_locally)
    return false;

  /* A symbol is local if the user has said explicitly that it will be,
     or if we have a definition for the symbol.  We cannot infer visibility
     for undefined symbols.  */
  if (DECL_VISIBILITY (exp) != VISIBILITY_DEFAULT
      && (TREE_CODE (exp) == FUNCTION_DECL
	  || !extern_protected_data
	  || DECL_VISIBILITY (exp) != VISIBILITY_PROTECTED)
      && (DECL_VISIBILITY_SPECIFIED (exp) || defined_locally))
    return true;

  /* If PIC, then assume that any global name can be overridden by
     symbols resolved from other modules.  */
  if (shlib)
    return false;

  /* Variables defined outside this object might not be local.  */
  if (DECL_EXTERNAL (exp) && !resolved_locally)
    return false;

  /* Non-dominant weak symbols are not defined locally.  */
  if (DECL_WEAK (exp) && !resolved_locally)
    return false;

  /* Uninitialized COMMON variable may be unified with symbols
     resolved from other modules.  */
  if (uninited_common && !resolved_locally)
    return false;

  /* Otherwise we're left with initialized (or non-common) global data
     which is of necessity defined locally.  */
  return true;
}

/* Assume ELF-ish defaults, since that's pretty much the most liberal
   wrt cross-module name binding.  */

bool
default_binds_local_p (const_tree exp)
{
  return default_binds_local_p_3 (exp, flag_shlib != 0, true, false, false);
}

/* Similar to default_binds_local_p, but common symbol may be local and
   extern protected data is non-local.  */

bool
default_binds_local_p_2 (const_tree exp)
{
  return default_binds_local_p_3 (exp, flag_shlib != 0, true, true,
				  !flag_pic);
}

bool
default_binds_local_p_1 (const_tree exp, int shlib)
{
  return default_binds_local_p_3 (exp, shlib != 0, false, false, false);
}

/* Return true when references to DECL must bind to current definition in
   final executable.

   The condition is usually equivalent to whether the function binds to the
   current module (shared library or executable), that is to binds_local_p.
   We use this fact to avoid need for another target hook and implement
   the logic using binds_local_p and just special cases where
   decl_binds_to_current_def_p is stronger than binds_local_p.  In particular
   the weak definitions (that can be overwritten at linktime by other
   definition from different object file) and when resolution info is available
   we simply use the knowledge passed to us by linker plugin.  */
bool
decl_binds_to_current_def_p (const_tree decl)
{
  gcc_assert (DECL_P (decl));
  if (!targetm.binds_local_p (decl))
    return false;
  if (!TREE_PUBLIC (decl))
    return true;

  /* When resolution is available, just use it.  */
  if (symtab_node *node = symtab_node::get (decl))
    {
      if (node->resolution != LDPR_UNKNOWN)
	return resolution_to_local_definition_p (node->resolution);
    }

  /* Otherwise we have to assume the worst for DECL_WEAK (hidden weaks
     binds locally but still can be overwritten), DECL_COMMON (can be merged
     with a non-common definition somewhere in the same module) or
     DECL_EXTERNAL.
     This rely on fact that binds_local_p behave as decl_replaceable_p
     for all other declaration types.  */
  if (DECL_WEAK (decl))
    return false;
  if (DECL_COMMON (decl)
      && (DECL_INITIAL (decl) == NULL
	  || (!in_lto_p && DECL_INITIAL (decl) == error_mark_node)))
    return false;
  if (DECL_EXTERNAL (decl))
    return false;
  return true;
}

/* A replaceable function or variable is one which may be replaced
   at link-time with an entirely different definition, provided that the
   replacement has the same type.  For example, functions declared
   with __attribute__((weak)) on most systems are replaceable.

   COMDAT functions are not replaceable, since all definitions of the
   function must be equivalent.  It is important that COMDAT functions
   not be treated as replaceable so that use of C++ template
   instantiations is not penalized.  */

bool
decl_replaceable_p (tree decl)
{
  gcc_assert (DECL_P (decl));
  if (!TREE_PUBLIC (decl) || DECL_COMDAT (decl))
    return false;
  if (!flag_semantic_interposition
      && !DECL_WEAK (decl))
    return false;
  return !decl_binds_to_current_def_p (decl);
}

/* Default function to output code that will globalize a label.  A
   target must define GLOBAL_ASM_OP or provide its own function to
   globalize a label.  */
#ifdef GLOBAL_ASM_OP
void
default_globalize_label (FILE * stream, const char *name)
{
  fputs (GLOBAL_ASM_OP, stream);
  assemble_name (stream, name);
  putc ('\n', stream);
}
#endif /* GLOBAL_ASM_OP */

/* Default function to output code that will globalize a declaration.  */
void
default_globalize_decl_name (FILE * stream, tree decl)
{
  const char *name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
  targetm.asm_out.globalize_label (stream, name);
}

/* Default function to output a label for unwind information.  The
   default is to do nothing.  A target that needs nonlocal labels for
   unwind information must provide its own function to do this.  */
void
default_emit_unwind_label (FILE * stream ATTRIBUTE_UNUSED,
			   tree decl ATTRIBUTE_UNUSED,
			   int for_eh ATTRIBUTE_UNUSED,
			   int empty ATTRIBUTE_UNUSED)
{
}

/* Default function to output a label to divide up the exception table.
   The default is to do nothing.  A target that needs/wants to divide
   up the table must provide it's own function to do this.  */
void
default_emit_except_table_label (FILE * stream ATTRIBUTE_UNUSED)
{
}

/* This is how to output an internal numbered label where PREFIX is
   the class of label and LABELNO is the number within the class.  */

void
default_generate_internal_label (char *buf, const char *prefix,
				 unsigned long labelno)
{
  ASM_GENERATE_INTERNAL_LABEL (buf, prefix, labelno);
}

/* This is how to output an internal numbered label where PREFIX is
   the class of label and LABELNO is the number within the class.  */

void
default_internal_label (FILE *stream, const char *prefix,
			unsigned long labelno)
{
  char *const buf = (char *) alloca (40 + strlen (prefix));
  ASM_GENERATE_INTERNAL_LABEL (buf, prefix, labelno);
  ASM_OUTPUT_INTERNAL_LABEL (stream, buf);
}


/* The default implementation of ASM_DECLARE_CONSTANT_NAME.  */

void
default_asm_declare_constant_name (FILE *file, const char *name,
				   const_tree exp ATTRIBUTE_UNUSED,
				   HOST_WIDE_INT size ATTRIBUTE_UNUSED)
{
  assemble_label (file, name);
}

/* This is the default behavior at the beginning of a file.  It's
   controlled by two other target-hook toggles.  */
void
default_file_start (void)
{
  if (targetm.asm_file_start_app_off
      && !(flag_verbose_asm || flag_debug_asm || flag_dump_rtl_in_asm))
    fputs (ASM_APP_OFF, asm_out_file);

  if (targetm.asm_file_start_file_directive)
    {
      /* LTO produced units have no meaningful main_input_filename.  */
      if (in_lto_p)
	output_file_directive (asm_out_file, "<artificial>");
      else
	output_file_directive (asm_out_file, main_input_filename);
    }
}

/* This is a generic routine suitable for use as TARGET_ASM_FILE_END
   which emits a special section directive used to indicate whether or
   not this object file needs an executable stack.  This is primarily
   a GNU extension to ELF but could be used on other targets.  */

int trampolines_created;

void
file_end_indicate_exec_stack (void)
{
  unsigned int flags = SECTION_DEBUG;
  if (trampolines_created)
    flags |= SECTION_CODE;

  switch_to_section (get_section (".note.GNU-stack", flags, NULL));
}

/* Emit a special section directive to indicate that this object file
   was compiled with -fsplit-stack.  This is used to let the linker
   detect calls between split-stack code and non-split-stack code, so
   that it can modify the split-stack code to allocate a sufficiently
   large stack.  We emit another special section if there are any
   functions in this file which have the no_split_stack attribute, to
   prevent the linker from warning about being unable to convert the
   functions if they call non-split-stack code.  */

void
file_end_indicate_split_stack (void)
{
  if (flag_split_stack)
    {
      switch_to_section (get_section (".note.GNU-split-stack", SECTION_DEBUG,
				      NULL));
      if (saw_no_split_stack)
	switch_to_section (get_section (".note.GNU-no-split-stack",
					SECTION_DEBUG, NULL));
    }
}

/* Output DIRECTIVE (a C string) followed by a newline.  This is used as
   a get_unnamed_section callback.  */

void
output_section_asm_op (const void *directive)
{
  fprintf (asm_out_file, "%s\n", (const char *) directive);
}

/* Emit assembly code to switch to section NEW_SECTION.  Do nothing if
   the current section is NEW_SECTION.  */

void
switch_to_section (section *new_section)
{
  if (in_section == new_section)
    return;

  if (new_section->common.flags & SECTION_FORGET)
    in_section = NULL;
  else
    in_section = new_section;

  switch (SECTION_STYLE (new_section))
    {
    case SECTION_NAMED:
      targetm.asm_out.named_section (new_section->named.name,
				     new_section->named.common.flags,
				     new_section->named.decl);
      break;

    case SECTION_UNNAMED:
      new_section->unnamed.callback (new_section->unnamed.data);
      break;

    case SECTION_NOSWITCH:
      gcc_unreachable ();
      break;
    }

  new_section->common.flags |= SECTION_DECLARED;
}

/* If block symbol SYMBOL has not yet been assigned an offset, place
   it at the end of its block.  */

void
place_block_symbol (rtx symbol)
{
  unsigned HOST_WIDE_INT size, mask, offset;
  struct constant_descriptor_rtx *desc;
  unsigned int alignment;
  struct object_block *block;
  tree decl;

  gcc_assert (SYMBOL_REF_BLOCK (symbol));
  if (SYMBOL_REF_BLOCK_OFFSET (symbol) >= 0)
    return;

  /* Work out the symbol's size and alignment.  */
  if (CONSTANT_POOL_ADDRESS_P (symbol))
    {
      desc = SYMBOL_REF_CONSTANT (symbol);
      alignment = desc->align;
      size = GET_MODE_SIZE (desc->mode);
    }
  else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol))
    {
      decl = SYMBOL_REF_DECL (symbol);
      gcc_checking_assert (DECL_IN_CONSTANT_POOL (decl));
      alignment = DECL_ALIGN (decl);
      size = get_constant_size (DECL_INITIAL (decl));
      if ((flag_sanitize & SANITIZE_ADDRESS)
	  && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
	  && asan_protect_global (DECL_INITIAL (decl)))
	size += asan_red_zone_size (size);
    }
  else
    {
      struct symtab_node *snode;
      decl = SYMBOL_REF_DECL (symbol);

      snode = symtab_node::get (decl);
      if (snode->alias)
	{
	  rtx target = DECL_RTL (snode->ultimate_alias_target ()->decl);

	  gcc_assert (MEM_P (target)
		      && GET_CODE (XEXP (target, 0)) == SYMBOL_REF
		      && SYMBOL_REF_HAS_BLOCK_INFO_P (XEXP (target, 0)));
	  target = XEXP (target, 0);
	  place_block_symbol (target);
	  SYMBOL_REF_BLOCK_OFFSET (symbol) = SYMBOL_REF_BLOCK_OFFSET (target);
	  return;
	}
      alignment = get_variable_align (decl);
      size = tree_to_uhwi (DECL_SIZE_UNIT (decl));
      if ((flag_sanitize & SANITIZE_ADDRESS)
	  && asan_protect_global (decl))
	{
	  size += asan_red_zone_size (size);
	  alignment = MAX (alignment,
			   ASAN_RED_ZONE_SIZE * BITS_PER_UNIT);
	}
    }

  /* Calculate the object's offset from the start of the block.  */
  block = SYMBOL_REF_BLOCK (symbol);
  mask = alignment / BITS_PER_UNIT - 1;
  offset = (block->size + mask) & ~mask;
  SYMBOL_REF_BLOCK_OFFSET (symbol) = offset;

  /* Record the block's new alignment and size.  */
  block->alignment = MAX (block->alignment, alignment);
  block->size = offset + size;

  vec_safe_push (block->objects, symbol);
}

/* Return the anchor that should be used to address byte offset OFFSET
   from the first object in BLOCK.  MODEL is the TLS model used
   to access it.  */

rtx
get_section_anchor (struct object_block *block, HOST_WIDE_INT offset,
		    enum tls_model model)
{
  char label[100];
  unsigned int begin, middle, end;
  unsigned HOST_WIDE_INT min_offset, max_offset, range, bias, delta;
  rtx anchor;

  /* Work out the anchor's offset.  Use an offset of 0 for the first
     anchor so that we don't pessimize the case where we take the address
     of a variable at the beginning of the block.  This is particularly
     useful when a block has only one variable assigned to it.

     We try to place anchors RANGE bytes apart, so there can then be
     anchors at +/-RANGE, +/-2 * RANGE, and so on, up to the limits of
     a ptr_mode offset.  With some target settings, the lowest such
     anchor might be out of range for the lowest ptr_mode offset;
     likewise the highest anchor for the highest offset.  Use anchors
     at the extreme ends of the ptr_mode range in such cases.

     All arithmetic uses unsigned integers in order to avoid
     signed overflow.  */
  max_offset = (unsigned HOST_WIDE_INT) targetm.max_anchor_offset;
  min_offset = (unsigned HOST_WIDE_INT) targetm.min_anchor_offset;
  range = max_offset - min_offset + 1;
  if (range == 0)
    offset = 0;
  else
    {
      bias = HOST_WIDE_INT_1U << (GET_MODE_BITSIZE (ptr_mode) - 1);
      if (offset < 0)
	{
	  delta = -(unsigned HOST_WIDE_INT) offset + max_offset;
	  delta -= delta % range;
	  if (delta > bias)
	    delta = bias;
	  offset = (HOST_WIDE_INT) (-delta);
	}
      else
	{
	  delta = (unsigned HOST_WIDE_INT) offset - min_offset;
	  delta -= delta % range;
	  if (delta > bias - 1)
	    delta = bias - 1;
	  offset = (HOST_WIDE_INT) delta;
	}
    }

  /* Do a binary search to see if there's already an anchor we can use.
     Set BEGIN to the new anchor's index if not.  */
  begin = 0;
  end = vec_safe_length (block->anchors);
  while (begin != end)
    {
      middle = (end + begin) / 2;
      anchor = (*block->anchors)[middle];
      if (SYMBOL_REF_BLOCK_OFFSET (anchor) > offset)
	end = middle;
      else if (SYMBOL_REF_BLOCK_OFFSET (anchor) < offset)
	begin = middle + 1;
      else if (SYMBOL_REF_TLS_MODEL (anchor) > model)
	end = middle;
      else if (SYMBOL_REF_TLS_MODEL (anchor) < model)
	begin = middle + 1;
      else
	return anchor;
    }

  /* Create a new anchor with a unique label.  */
  ASM_GENERATE_INTERNAL_LABEL (label, "LANCHOR", anchor_labelno++);
  anchor = create_block_symbol (ggc_strdup (label), block, offset);
  SYMBOL_REF_FLAGS (anchor) |= SYMBOL_FLAG_LOCAL | SYMBOL_FLAG_ANCHOR;
  SYMBOL_REF_FLAGS (anchor) |= model << SYMBOL_FLAG_TLS_SHIFT;

  /* Insert it at index BEGIN.  */
  vec_safe_insert (block->anchors, begin, anchor);
  return anchor;
}

/* Output the objects in BLOCK.  */

static void
output_object_block (struct object_block *block)
{
  struct constant_descriptor_rtx *desc;
  unsigned int i;
  HOST_WIDE_INT offset;
  tree decl;
  rtx symbol;

  if (!block->objects)
    return;

  /* Switch to the section and make sure that the first byte is
     suitably aligned.  */
  /* Special case VTV comdat sections similar to assemble_variable.  */
  if (SECTION_STYLE (block->sect) == SECTION_NAMED
      && block->sect->named.name
      && (strcmp (block->sect->named.name, ".vtable_map_vars") == 0))
    handle_vtv_comdat_section (block->sect, block->sect->named.decl);
  else
    switch_to_section (block->sect);

  assemble_align (block->alignment);

  /* Define the values of all anchors relative to the current section
     position.  */
  FOR_EACH_VEC_SAFE_ELT (block->anchors, i, symbol)
    targetm.asm_out.output_anchor (symbol);

  /* Output the objects themselves.  */
  offset = 0;
  FOR_EACH_VEC_ELT (*block->objects, i, symbol)
    {
      /* Move to the object's offset, padding with zeros if necessary.  */
      assemble_zeros (SYMBOL_REF_BLOCK_OFFSET (symbol) - offset);
      offset = SYMBOL_REF_BLOCK_OFFSET (symbol);
      if (CONSTANT_POOL_ADDRESS_P (symbol))
	{
	  desc = SYMBOL_REF_CONSTANT (symbol);
	  /* Pass 1 for align as we have already laid out everything in the block.
	     So aligning shouldn't be necessary.  */
	  output_constant_pool_1 (desc, 1);
	  offset += GET_MODE_SIZE (desc->mode);
	}
      else if (TREE_CONSTANT_POOL_ADDRESS_P (symbol))
	{
	  HOST_WIDE_INT size;
	  decl = SYMBOL_REF_DECL (symbol);
	  assemble_constant_contents
	       (DECL_INITIAL (decl), XSTR (symbol, 0), DECL_ALIGN (decl));

	  size = get_constant_size (DECL_INITIAL (decl));
	  offset += size;
	  if ((flag_sanitize & SANITIZE_ADDRESS)
	      && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
	      && asan_protect_global (DECL_INITIAL (decl)))
	    {
	      size = asan_red_zone_size (size);
	      assemble_zeros (size);
	      offset += size;
	    }
	}
      else
	{
	  HOST_WIDE_INT size;
	  decl = SYMBOL_REF_DECL (symbol);
	  assemble_variable_contents (decl, XSTR (symbol, 0), false);
	  size = tree_to_uhwi (DECL_SIZE_UNIT (decl));
	  offset += size;
	  if ((flag_sanitize & SANITIZE_ADDRESS)
	      && asan_protect_global (decl))
	    {
	      size = asan_red_zone_size (size);
	      assemble_zeros (size);
	      offset += size;
	    }
	}
    }
}

/* A callback for qsort to compare object_blocks.  */

static int
output_object_block_compare (const void *x, const void *y)
{
  object_block *p1 = *(object_block * const*)x;
  object_block *p2 = *(object_block * const*)y;

  if (p1->sect->common.flags & SECTION_NAMED
      && !(p2->sect->common.flags & SECTION_NAMED))
    return 1;

  if (!(p1->sect->common.flags & SECTION_NAMED)
      && p2->sect->common.flags & SECTION_NAMED)
    return -1;

  if (p1->sect->common.flags & SECTION_NAMED
      && p2->sect->common.flags & SECTION_NAMED)
    return strcmp (p1->sect->named.name, p2->sect->named.name);

  unsigned f1 = p1->sect->common.flags;
  unsigned f2 = p2->sect->common.flags;
  if (f1 == f2)
    return 0;
  return f1 < f2 ? -1 : 1;
}

/* Output the definitions of all object_blocks.  */

void
output_object_blocks (void)
{
  vec<object_block *, va_heap> v;
  v.create (object_block_htab->elements ());
  object_block *obj;
  hash_table<object_block_hasher>::iterator hi;

  FOR_EACH_HASH_TABLE_ELEMENT (*object_block_htab, obj, object_block *, hi)
    v.quick_push (obj);

  /* Sort them in order to output them in a deterministic manner,
     otherwise we may get .rodata sections in different orders with
     and without -g.  */
  v.qsort (output_object_block_compare);
  unsigned i;
  FOR_EACH_VEC_ELT (v, i, obj)
    output_object_block (obj);

  v.release ();
}

/* This function provides a possible implementation of the
   TARGET_ASM_RECORD_GCC_SWITCHES target hook for ELF targets.  When triggered
   by -frecord-gcc-switches it creates a new mergeable, string section in the
   assembler output file called TARGET_ASM_RECORD_GCC_SWITCHES_SECTION which
   contains the switches in ASCII format.

   FIXME: This code does not correctly handle double quote characters
   that appear inside strings, (it strips them rather than preserving them).
   FIXME: ASM_OUTPUT_ASCII, as defined in config/elfos.h will not emit NUL
   characters - instead it treats them as sub-string separators.  Since
   we want to emit NUL strings terminators into the object file we have to use
   ASM_OUTPUT_SKIP.  */

int
elf_record_gcc_switches (print_switch_type type, const char * name)
{
  switch (type)
    {
    case SWITCH_TYPE_PASSED:
      ASM_OUTPUT_ASCII (asm_out_file, name, strlen (name));
      ASM_OUTPUT_SKIP (asm_out_file, (unsigned HOST_WIDE_INT) 1);
      break;

    case SWITCH_TYPE_DESCRIPTIVE:
      if (name == NULL)
	{
	  /* Distinguish between invocations where name is NULL.  */
	  static bool started = false;

	  if (!started)
	    {
	      section * sec;

	      sec = get_section (targetm.asm_out.record_gcc_switches_section,
				 SECTION_DEBUG
				 | SECTION_MERGE
				 | SECTION_STRINGS
				 | (SECTION_ENTSIZE & 1),
				 NULL);
	      switch_to_section (sec);
	      started = true;
	    }
	}

    default:
      break;
    }

  /* The return value is currently ignored by the caller, but must be 0.
     For -fverbose-asm the return value would be the number of characters
     emitted into the assembler file.  */
  return 0;
}

/* Emit text to declare externally defined symbols. It is needed to
   properly support non-default visibility.  */
void
default_elf_asm_output_external (FILE *file ATTRIBUTE_UNUSED,
				 tree decl,
				 const char *name ATTRIBUTE_UNUSED)
{
  /* We output the name if and only if TREE_SYMBOL_REFERENCED is
     set in order to avoid putting out names that are never really
     used.  Always output visibility specified in the source.  */
  if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))
      && (DECL_VISIBILITY_SPECIFIED (decl)
	  || targetm.binds_local_p (decl)))
    maybe_assemble_visibility (decl);
}

/* The default hook for TARGET_ASM_OUTPUT_SOURCE_FILENAME.  */

void
default_asm_output_source_filename (FILE *file, const char *name)
{
#ifdef ASM_OUTPUT_SOURCE_FILENAME
  ASM_OUTPUT_SOURCE_FILENAME (file, name);
#else
  fprintf (file, "\t.file\t");
  output_quoted_string (file, name);
  putc ('\n', file);
#endif
}

/* Output a file name in the form wanted by System V.  */

void
output_file_directive (FILE *asm_file, const char *input_name)
{
  int len;
  const char *na;

  if (input_name == NULL)
    input_name = "<stdin>";
  else
    input_name = remap_debug_filename (input_name);

  len = strlen (input_name);
  na = input_name + len;

  /* NA gets INPUT_NAME sans directory names.  */
  while (na > input_name)
    {
      if (IS_DIR_SEPARATOR (na[-1]))
	break;
      na--;
    }

  targetm.asm_out.output_source_filename (asm_file, na);
}

/* Create a DEBUG_EXPR_DECL / DEBUG_EXPR pair from RTL expression
   EXP.  */
rtx
make_debug_expr_from_rtl (const_rtx exp)
{
  tree ddecl = make_node (DEBUG_EXPR_DECL), type;
  machine_mode mode = GET_MODE (exp);
  rtx dval;

  DECL_ARTIFICIAL (ddecl) = 1;
  if (REG_P (exp) && REG_EXPR (exp))
    type = TREE_TYPE (REG_EXPR (exp));
  else if (MEM_P (exp) && MEM_EXPR (exp))
    type = TREE_TYPE (MEM_EXPR (exp));
  else
    type = NULL_TREE;
  if (type && TYPE_MODE (type) == mode)
    TREE_TYPE (ddecl) = type;
  else
    TREE_TYPE (ddecl) = lang_hooks.types.type_for_mode (mode, 1);
  DECL_MODE (ddecl) = mode;
  dval = gen_rtx_DEBUG_EXPR (mode);
  DEBUG_EXPR_TREE_DECL (dval) = ddecl;
  SET_DECL_RTL (ddecl, dval);
  return dval;
}

#ifdef ELF_ASCII_ESCAPES
/* Default ASM_OUTPUT_LIMITED_STRING for ELF targets.  */

void
default_elf_asm_output_limited_string (FILE *f, const char *s)
{
  int escape;
  unsigned char c;

  fputs (STRING_ASM_OP, f);
  putc ('"', f);
  while (*s != '\0')
    {
      c = *s;
      escape = ELF_ASCII_ESCAPES[c];
      switch (escape)
	{
	case 0:
	  putc (c, f);
	  break;
	case 1:
	  /* TODO: Print in hex with fast function, important for -flto. */
	  fprintf (f, "\\%03o", c);
	  break;
	default:
	  putc ('\\', f);
	  putc (escape, f);
	  break;
	}
      s++;
    }
  putc ('\"', f);
  putc ('\n', f);
}

/* Default ASM_OUTPUT_ASCII for ELF targets.  */

void
default_elf_asm_output_ascii (FILE *f, const char *s, unsigned int len)
{
  const char *limit = s + len;
  const char *last_null = NULL;
  unsigned bytes_in_chunk = 0;
  unsigned char c;
  int escape;

  for (; s < limit; s++)
    {
      const char *p;

      if (bytes_in_chunk >= 60)
	{
	  putc ('\"', f);
	  putc ('\n', f);
	  bytes_in_chunk = 0;
	}

      if (s > last_null)
	{
	  for (p = s; p < limit && *p != '\0'; p++)
	    continue;
	  last_null = p;
	}
      else
	p = last_null;

      if (p < limit && (p - s) <= (long) ELF_STRING_LIMIT)
	{
	  if (bytes_in_chunk > 0)
	    {
	      putc ('\"', f);
	      putc ('\n', f);
	      bytes_in_chunk = 0;
	    }

	  default_elf_asm_output_limited_string (f, s);
	  s = p;
	}
      else
	{
	  if (bytes_in_chunk == 0)
	    fputs (ASCII_DATA_ASM_OP "\"", f);

	  c = *s;
	  escape = ELF_ASCII_ESCAPES[c];
	  switch (escape)
	    {
	    case 0:
	      putc (c, f);
	      bytes_in_chunk++;
	      break;
	    case 1:
	      /* TODO: Print in hex with fast function, important for -flto. */
	      fprintf (f, "\\%03o", c);
	      bytes_in_chunk += 4;
	      break;
	    default:
	      putc ('\\', f);
	      putc (escape, f);
	      bytes_in_chunk += 2;
	      break;
	    }

	}
    }

  if (bytes_in_chunk > 0)
    {
      putc ('\"', f);
      putc ('\n', f);
    }
}
#endif

static GTY(()) section *elf_init_array_section;
static GTY(()) section *elf_fini_array_section;

static section *
get_elf_initfini_array_priority_section (int priority,
					 bool constructor_p)
{
  section *sec;
  if (priority != DEFAULT_INIT_PRIORITY)
    {
      char buf[18];
      sprintf (buf, "%s.%.5u", 
	       constructor_p ? ".init_array" : ".fini_array",
	       priority);
      sec = get_section (buf, SECTION_WRITE | SECTION_NOTYPE, NULL_TREE);
    }
  else
    {
      if (constructor_p)
	{
	  if (elf_init_array_section == NULL)
	    elf_init_array_section
	      = get_section (".init_array",
			     SECTION_WRITE | SECTION_NOTYPE, NULL_TREE);
	  sec = elf_init_array_section;
	}
      else
	{
	  if (elf_fini_array_section == NULL)
	    elf_fini_array_section
	      = get_section (".fini_array",
			     SECTION_WRITE | SECTION_NOTYPE, NULL_TREE);
	  sec = elf_fini_array_section;
	}
    }
  return sec;
}

/* Use .init_array section for constructors. */

void
default_elf_init_array_asm_out_constructor (rtx symbol, int priority)
{
  section *sec = get_elf_initfini_array_priority_section (priority,
							  true);
  assemble_addr_to_section (symbol, sec);
}

/* Use .fini_array section for destructors. */

void
default_elf_fini_array_asm_out_destructor (rtx symbol, int priority)
{
  section *sec = get_elf_initfini_array_priority_section (priority,
							  false);
  assemble_addr_to_section (symbol, sec);
}

/* Default TARGET_ASM_OUTPUT_IDENT hook.

   This is a bit of a cheat.  The real default is a no-op, but this
   hook is the default for all targets with a .ident directive.  */

void
default_asm_output_ident_directive (const char *ident_str)
{
  const char *ident_asm_op = "\t.ident\t";

  /* If we are still in the front end, do not write out the string
     to asm_out_file.  Instead, add a fake top-level asm statement.
     This allows the front ends to use this hook without actually
     writing to asm_out_file, to handle #ident or Pragma Ident.  */
  if (symtab->state == PARSING)
    {
      char *buf = ACONCAT ((ident_asm_op, "\"", ident_str, "\"\n", NULL));
      symtab->finalize_toplevel_asm (build_string (strlen (buf), buf));
    }
  else
    fprintf (asm_out_file, "%s\"%s\"\n", ident_asm_op, ident_str);
}


/* This function ensures that vtable_map variables are not only
   in the comdat section, but that each variable has its own unique
   comdat name.  Without this the variables end up in the same section
   with a single comdat name.

   FIXME:  resolve_unique_section needs to deal better with
   decls with both DECL_SECTION_NAME and DECL_ONE_ONLY.  Once
   that is fixed, this if-else statement can be replaced with
   a single call to "switch_to_section (sect)".  */

static void
handle_vtv_comdat_section (section *sect, const_tree decl ATTRIBUTE_UNUSED)
{
#if defined (OBJECT_FORMAT_ELF)
  targetm.asm_out.named_section (sect->named.name,
				 sect->named.common.flags
				 | SECTION_LINKONCE,
				 DECL_NAME (decl));
  in_section = sect;
#elif defined (TARGET_PECOFF)
  /* Neither OBJECT_FORMAT_PE, nor OBJECT_FORMAT_COFF is set here.
     Therefore the following check is used.
     In case a the target is PE or COFF a comdat group section
     is created, e.g. .vtable_map_vars$foo. The linker places
     everything in .vtable_map_vars at the end.

     A fix could be made in
     gcc/config/i386/winnt.c: i386_pe_unique_section.  */
  if (TARGET_PECOFF)
    {
      char *name;

      if (TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE)
	name = ACONCAT ((sect->named.name, "$",
			 IDENTIFIER_POINTER (DECL_NAME (decl)), NULL));
      else
	name = ACONCAT ((sect->named.name, "$",
			 IDENTIFIER_POINTER (DECL_COMDAT_GROUP (DECL_NAME (decl))),
			 NULL));

      targetm.asm_out.named_section (name,
				     sect->named.common.flags
				     | SECTION_LINKONCE,
				     DECL_NAME (decl));
      in_section = sect;
    }
#else
  switch_to_section (sect);
#endif
}

#include "gt-varasm.h"