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tree-optimization/96376 - do not check alignment for invariant loads

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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.
This commit is contained in:
Richard Biener 2021-01-15 14:20:43 +01:00
parent dc8475e334
commit 446703ccc2
1 changed files with 15 additions and 8 deletions
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23
gcc/tree-vect-stmts.c
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@ -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