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authorRichard Biener <rguenther@suse.de>2021-01-15 14:20:43 +0100
committerRichard Biener <rguenther@suse.de>2021-01-15 15:07:43 +0100
commit446703ccc2ce09e9710964f781a21030bf3c2d54 (patch)
tree0480e330b41566cac5233685f672f32fb77817fa /gcc
parentdc8475e3348405ce3113364746b64d029a05c343 (diff)
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tree-optimization/96376 - do not check alignment for invariant loads
The testcases show that we fail to disregard alignment for invariant loads. The patch handles them like we handle gather and scatter. 2021-01-15 Richard Biener <rguenther@suse.de> PR tree-optimization/96376 * tree-vect-stmts.c (get_load_store_type): Disregard alignment for VMAT_INVARIANT.
Diffstat (limited to 'gcc')
-rw-r--r--gcc/tree-vect-stmts.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 4d72c4d..f180ced 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -2378,19 +2378,26 @@ get_load_store_type (vec_info *vinfo, stmt_vec_info stmt_info,
else
{
int cmp = compare_step_with_zero (vinfo, stmt_info);
- if (cmp < 0)
- *memory_access_type = get_negative_load_store_type
- (vinfo, stmt_info, vectype, vls_type, ncopies);
- else if (cmp == 0)
+ if (cmp == 0)
{
gcc_assert (vls_type == VLS_LOAD);
*memory_access_type = VMAT_INVARIANT;
+ /* Invariant accesses perform only component accesses, alignment
+ is irrelevant for them. */
+ *alignment_support_scheme = dr_unaligned_supported;
}
else
- *memory_access_type = VMAT_CONTIGUOUS;
- *alignment_support_scheme
- = vect_supportable_dr_alignment (vinfo,
- STMT_VINFO_DR_INFO (stmt_info), false);
+ {
+ if (cmp < 0)
+ *memory_access_type = get_negative_load_store_type
+ (vinfo, stmt_info, vectype, vls_type, ncopies);
+ else
+ *memory_access_type = VMAT_CONTIGUOUS;
+ *alignment_support_scheme
+ = vect_supportable_dr_alignment (vinfo,
+ STMT_VINFO_DR_INFO (stmt_info),
+ false);
+ }
}
if ((*memory_access_type == VMAT_ELEMENTWISE