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vect: Use vect_relevant_for_alignment_p consistently

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Minor code refactorings in tree-vect-data-refs.c.  When trying loop peeling
to force alignment, call vect_relevant_for_alignment_p to filter out data
references in the loop whose alignment is irrelevant.

2020-06-18  Felix Yang  <felix.yang@huawei.com>

gcc/
	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Call
	vect_relevant_for_alignment_p to filter out data references in
	the loop whose alignment is irrelevant when trying loop peeling
	to force alignment.
This commit is contained in:
Fei Yang 2020-06-18 20:11:09 +01:00 • committed by Richard Sandiford
parent e95395926a
commit e54353a72a
1 changed files with 4 additions and 27 deletions
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31
gcc/tree-vect-data-refs.c
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@ -1722,29 +1722,10 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
FOR_EACH_VEC_ELT (datarefs, i, dr)
{
dr_vec_info *dr_info = loop_vinfo->lookup_dr (dr);
if (!vect_relevant_for_alignment_p (dr_info))
continue;
stmt_vec_info stmt_info = dr_info->stmt;
if (!STMT_VINFO_RELEVANT_P (stmt_info))
continue;
/* For interleaving, only the alignment of the first access
matters. */
if (STMT_VINFO_GROUPED_ACCESS (stmt_info)
&& DR_GROUP_FIRST_ELEMENT (stmt_info) != stmt_info)
continue;
/* For scatter-gather or invariant accesses there is nothing
to enhance. */
if (STMT_VINFO_GATHER_SCATTER_P (stmt_info)
|| integer_zerop (DR_STEP (dr)))
continue;
/* Strided accesses perform only component accesses, alignment is
irrelevant for them. */
if (STMT_VINFO_STRIDED_P (stmt_info)
&& !STMT_VINFO_GROUPED_ACCESS (stmt_info))
continue;
supportable_dr_alignment
= vect_supportable_dr_alignment (loop_vinfo, dr_info, true);
do_peeling = vector_alignment_reachable_p (dr_info);
@ -2136,12 +2117,8 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
FOR_EACH_VEC_ELT (datarefs, i, dr)
if (dr != dr0_info->dr)
{
/* Strided accesses perform only component accesses, alignment
is irrelevant for them. */
dr_vec_info *dr_info = loop_vinfo->lookup_dr (dr);
stmt_info = dr_info->stmt;
if (STMT_VINFO_STRIDED_P (stmt_info)
&& !STMT_VINFO_GROUPED_ACCESS (stmt_info))
if (!vect_relevant_for_alignment_p (dr_info))
continue;
vect_update_misalignment_for_peel (dr_info, dr0_info, npeel);