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| author | Richard Biener <rguenther@suse.de> | 2017-05-03 11:01:06 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-05-03 11:01:06 +0000 |
| commit | 49ab46214e9288ee1268f87ddcd64dacfd21c31d (patch) | |
| tree | 49ac386194b21f2505e28121e490f1735948196b /gcc/tree-vect-data-refs.c | |
| parent | 8d5f521a5c09313c5c01005a69440f21bc80bc97 (diff) | |
| download | gcc-49ab46214e9288ee1268f87ddcd64dacfd21c31d.zip gcc-49ab46214e9288ee1268f87ddcd64dacfd21c31d.tar.gz gcc-49ab46214e9288ee1268f87ddcd64dacfd21c31d.tar.bz2 | |
tree-vect-data-refs.c (vect_enhance_data_refs_alignment): When all DRs have unknown misaligned do not always peel when...
2017-05-03 Richard Biener <rguenther@suse.de>
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
When all DRs have unknown misaligned do not always peel
when there is a store but apply the same costing model as if
there were only loads.
* gcc.dg/vect/costmodel/x86_64/costmodel-alignpeel.c: New testcase.
From-SVN: r247544
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index aa504b6..c974268 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -1715,18 +1715,18 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo) dr0 = first_store; } - /* In case there are only loads with different unknown misalignments, use - peeling only if it may help to align other accesses in the loop or + /* Use peeling only if it may help to align other accesses in the loop or if it may help improving load bandwith when we'd end up using unaligned loads. */ tree dr0_vt = STMT_VINFO_VECTYPE (vinfo_for_stmt (DR_STMT (dr0))); - if (!first_store - && !STMT_VINFO_SAME_ALIGN_REFS ( - vinfo_for_stmt (DR_STMT (dr0))).length () + if (STMT_VINFO_SAME_ALIGN_REFS + (vinfo_for_stmt (DR_STMT (dr0))).length () == 0 && (vect_supportable_dr_alignment (dr0, false) != dr_unaligned_supported - || (builtin_vectorization_cost (vector_load, dr0_vt, 0) - == builtin_vectorization_cost (unaligned_load, dr0_vt, -1)))) + || (DR_IS_READ (dr0) + && (builtin_vectorization_cost (vector_load, dr0_vt, 0) + == builtin_vectorization_cost (unaligned_load, + dr0_vt, -1))))) do_peeling = false; } |