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
|
; RUN: llc --force-dwarf-frame-section --exception-model=arm %s -o - | FileCheck %s
; RUN: llc --filetype=obj %s --exception-model=arm -o - | llvm-readelf -s --unwind - | FileCheck %s --check-prefix=UNWIND
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
; Triple tweaked so we get 16-byte stack alignment and better test coverage.
target triple = "armv7m-none-nacl-android"
; -Oz
; volatile int a, b, c, d, e, f, g, h, i;
;
; int x() {
; int r = (a + b) / (c + d) + e + f / g + h + i;
; return r + 1;
; }
;
; int y() {
; int r = (a + b) / (c + d) + e + f / g + h + i;
; return r + 2;
; }
@a = hidden global i32 0, align 4
@b = hidden global i32 0, align 4
@c = hidden global i32 0, align 4
@d = hidden global i32 0, align 4
@e = hidden global i32 0, align 4
@f = hidden global i32 0, align 4
@g = hidden global i32 0, align 4
@h = hidden global i32 0, align 4
@i = hidden global i32 0, align 4
define hidden i32 @x() local_unnamed_addr #0 {
entry:
%0 = load volatile i32, i32* @a, align 4
%1 = load volatile i32, i32* @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, i32* @c, align 4
%3 = load volatile i32, i32* @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, i32* @e, align 4
%5 = load volatile i32, i32* @f, align 4
%6 = load volatile i32, i32* @g, align 4
%div3 = sdiv i32 %5, %6
%7 = load volatile i32, i32* @h, align 4
%8 = load volatile i32, i32* @i, align 4
%add2 = add i32 %div, 1
%add4 = add i32 %add2, %4
%add5 = add i32 %add4, %div3
%add6 = add i32 %add5, %7
%add7 = add i32 %add6, %8
ret i32 %add7
}
; CHECK-LABEL: x:
; CHECK: ldr r0, .LCPI0_0
; CHECK-NEXT: pac r12, lr, sp
; CHECK-NEXT: .pad #8
; CHECK-NEXT: .save {ra_auth_code, lr}
; CHECK-NEXT: strd r12, lr, [sp, #-16]!
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -12
; CHECK-NEXT: .cfi_offset ra_auth_code, -16
; CHECK-NEXT: bl OUTLINED_FUNCTION_0
; CHECK-NEXT: ldrd r12, lr, [sp], #16
; CHECK-NEXT: .cfi_def_cfa_offset 0
; CHECK-NEXT: .cfi_restore lr
; CHECK-NEXT: .cfi_undefined ra_auth_code
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: adds r0, #1
; CHECK-NEXT: bx lr
define hidden i32 @y() local_unnamed_addr #0 {
entry:
%0 = load volatile i32, i32* @a, align 4
%1 = load volatile i32, i32* @b, align 4
%add = add nsw i32 %1, %0
%2 = load volatile i32, i32* @c, align 4
%3 = load volatile i32, i32* @d, align 4
%add1 = add nsw i32 %3, %2
%div = sdiv i32 %add, %add1
%4 = load volatile i32, i32* @e, align 4
%5 = load volatile i32, i32* @f, align 4
%6 = load volatile i32, i32* @g, align 4
%div3 = sdiv i32 %5, %6
%7 = load volatile i32, i32* @h, align 4
%8 = load volatile i32, i32* @i, align 4
%add2 = add i32 %div, 2
%add4 = add i32 %add2, %4
%add5 = add i32 %add4, %div3
%add6 = add i32 %add5, %7
%add7 = add i32 %add6, %8
ret i32 %add7
}
; CHECK-LABEL: y:
; CHECK: ldr r0, .LCPI1_0
; CHECK-NEXT: pac r12, lr, sp
; CHECK-NEXT: .pad #8
; CHECK-NEXT: .save {ra_auth_code, lr}
; CHECK-NEXT: strd r12, lr, [sp, #-16]!
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: .cfi_offset lr, -12
; CHECK-NEXT: .cfi_offset ra_auth_code, -16
; CHECK-NEXT: bl OUTLINED_FUNCTION_0
; CHECK-NEXT: ldrd r12, lr, [sp], #16
; CHECK-NEXT: .cfi_def_cfa_offset 0
; CHECK-NEXT: .cfi_restore lr
; CHECK-NEXT: .cfi_undefined ra_auth_code
; CHECK-NEXT: aut r12, lr, sp
; CHECK-NEXT: adds r0, #2
; CHECK-NEXT: bx lr
; CHECK-LABEL: OUTLINED_FUNCTION_0:
; CHECK-NOT: pac
; CHECK-NOT: aut
; CHECK-NOT: r12
; CHECK: bx lr
attributes #0 = { minsize nofree norecurse nounwind optsize uwtable}
!llvm.module.flags = !{!0, !1, !2}
!0 = !{i32 1, !"branch-target-enforcement", i32 0}
!1 = !{i32 1, !"sign-return-address", i32 1}
!2 = !{i32 1, !"sign-return-address-all", i32 0}
; UNWIND-LABEL: FunctionAddress: 0x0
; UNWIND: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x00 ; pop {lr}
; UNWIND-NEXT: 0x01 ; vsp = vsp + 8
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-LABEL: FunctionAddress: 0x20
; UNWIND: 0xB4 ; pop ra_auth_code
; UNWIND-NEXT: 0x84 0x00 ; pop {lr}
; UNWIND-NEXT: 0x01 ; vsp = vsp + 8
; UNWIND-NEXT: 0xB0 ; finish
; UNWIND-LABEL: FunctionAddress: 0x40
; UNWIND: Model: CantUnwind
; UNWINND-LABEL: 00000041 {{.*}} OUTLINED_FUNCTION_0
; UNWINND-LABEL: 00000001 {{.*}} x
; UNWINND-LABEL: 00000021 {{.*}} y
|
