diff options
Diffstat (limited to 'gcc/tree-vect-analyze.c')
| -rw-r--r-- | gcc/tree-vect-analyze.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/gcc/tree-vect-analyze.c b/gcc/tree-vect-analyze.c index 0b8e26ce9e1..da033c82874 100644 --- a/gcc/tree-vect-analyze.c +++ b/gcc/tree-vect-analyze.c @@ -853,7 +853,8 @@ vect_analyze_data_ref_dependence (struct data_reference *dra, int dist = 0; unsigned int loop_depth = 0; struct loop *loop_nest = loop; - + stmt_vec_info stmtinfo_a = vinfo_for_stmt (DR_STMT (dra)); + stmt_vec_info stmtinfo_b = vinfo_for_stmt (DR_STMT (drb)); if (!vect_base_addr_differ_p (dra, drb, &differ_p)) { @@ -924,10 +925,13 @@ vect_analyze_data_ref_dependence (struct data_reference *dra, dist = DDR_DIST_VECT (ddr)[loop_depth]; /* Same loop iteration. */ - if (dist == 0) + if (dist % vectorization_factor == 0) { - if (vect_print_dump_info (REPORT_DETAILS, LOOP_LOC (loop_vinfo))) - fprintf (vect_dump, "dependence distance 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, LOOP_LOC (loop_vinfo))) + fprintf (vect_dump, "accesses have the same alignment."); return false; } @@ -1146,7 +1150,9 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) varray_type loop_read_datarefs = LOOP_VINFO_DATAREF_READS (loop_vinfo); varray_type loop_write_datarefs = LOOP_VINFO_DATAREF_WRITES (loop_vinfo); varray_type datarefs; + VEC(dr_p,heap) *same_align_drs; struct data_reference *dr0 = NULL; + struct data_reference *dr; unsigned int i, j; /* @@ -1300,7 +1306,8 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) else if (known_alignment_for_access_p (dr) && known_alignment_for_access_p (dr0)) { - int drsize = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (DR_REF (dr)))); + int drsize = + GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (DR_REF (dr)))); DR_MISALIGNMENT (dr) += npeel * drsize; DR_MISALIGNMENT (dr) %= UNITS_PER_SIMD_WORD; @@ -1311,6 +1318,13 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) datarefs = loop_read_datarefs; } + same_align_drs = + STMT_VINFO_SAME_ALIGN_REFS (vinfo_for_stmt (DR_STMT (dr0))); + for (i = 0; VEC_iterate (dr_p, same_align_drs, i, dr); i++) + { + DR_MISALIGNMENT (dr) = 0; + } + DR_MISALIGNMENT (dr0) = 0; } } |
