diff options
Diffstat (limited to 'gcc/tree-vect-analyze.c')
| -rw-r--r-- | gcc/tree-vect-analyze.c | 84 |
1 files changed, 45 insertions, 39 deletions
diff --git a/gcc/tree-vect-analyze.c b/gcc/tree-vect-analyze.c index a9681bd0c18..ab749fba34a 100644 --- a/gcc/tree-vect-analyze.c +++ b/gcc/tree-vect-analyze.c @@ -570,9 +570,9 @@ static bool vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr, loop_vec_info loop_vinfo) { + unsigned int i; struct loop *loop = LOOP_VINFO_LOOP (loop_vinfo); int vectorization_factor = LOOP_VINFO_VECT_FACTOR (loop_vinfo); - int dist = 0; unsigned int loop_depth = 0; struct loop *loop_nest = loop; struct data_reference *dra = DDR_A (ddr); @@ -596,7 +596,7 @@ vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr, return true; } - if (!DDR_DIST_VECT (ddr)) + if (DDR_NUM_DIST_VECTS (ddr) == 0) { if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS)) { @@ -614,48 +614,54 @@ vect_analyze_data_ref_dependence (struct data_dependence_relation *ddr, loop_nest = loop_nest->outer; loop_depth++; } - - dist = DDR_DIST_VECT (ddr)[loop_depth]; - if (vect_print_dump_info (REPORT_DR_DETAILS)) - fprintf (vect_dump, "dependence distance = %d.",dist); - /* Same loop iteration. */ - if (dist % vectorization_factor == 0) + for (i = 0; i < DDR_NUM_DIST_VECTS (ddr); i++) { - /* Two references with distance zero have the same alignment. */ - VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_a), drb); - VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_b), dra); - if (vect_print_dump_info (REPORT_ALIGNMENT)) - fprintf (vect_dump, "accesses have the same alignment."); - if (vect_print_dump_info (REPORT_DR_DETAILS)) - { - fprintf (vect_dump, "dependence distance modulo vf == 0 between "); - print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM); - fprintf (vect_dump, " and "); - print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM); - } - return false; - } + int dist = DDR_DIST_VECT (ddr, i)[loop_depth]; - if (abs (dist) >= vectorization_factor) - { - /* Dependence distance does not create dependence, as far as vectorization - is concerned, in this case. */ if (vect_print_dump_info (REPORT_DR_DETAILS)) - fprintf (vect_dump, "dependence distance >= VF."); - return false; - } - - if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS)) - { - fprintf (vect_dump, - "not vectorized: possible dependence between data-refs "); - print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM); - fprintf (vect_dump, " and "); - print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM); + fprintf (vect_dump, "dependence distance = %d.", dist); + + /* Same loop iteration. */ + if (dist % vectorization_factor == 0) + { + /* Two references with distance zero have the same alignment. */ + VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_a), drb); + VEC_safe_push (dr_p, heap, STMT_VINFO_SAME_ALIGN_REFS (stmtinfo_b), dra); + if (vect_print_dump_info (REPORT_ALIGNMENT)) + fprintf (vect_dump, "accesses have the same alignment."); + if (vect_print_dump_info (REPORT_DR_DETAILS)) + { + fprintf (vect_dump, "dependence distance modulo vf == 0 between "); + print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM); + fprintf (vect_dump, " and "); + print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM); + } + continue; + } + + if (abs (dist) >= vectorization_factor) + { + /* Dependence distance does not create dependence, as far as vectorization + is concerned, in this case. */ + if (vect_print_dump_info (REPORT_DR_DETAILS)) + fprintf (vect_dump, "dependence distance >= VF."); + continue; + } + + if (vect_print_dump_info (REPORT_UNVECTORIZED_LOOPS)) + { + fprintf (vect_dump, + "not vectorized: possible dependence between data-refs "); + print_generic_expr (vect_dump, DR_REF (dra), TDF_SLIM); + fprintf (vect_dump, " and "); + print_generic_expr (vect_dump, DR_REF (drb), TDF_SLIM); + } + + return true; } - - return true; + + return false; } |