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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-29 14:48:30 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-11-29 14:48:30 +0000 |
| commit | 7e99af4816cfad578094fcf08e2377f3ed76e201 (patch) | |
| tree | 4e208d19de064a1a6dab5a34778f71384ef8d667 /gcc/tree-vect-loop.c | |
| parent | 02d895504cc59be06fc3f7ec0cfd4eb160561211 (diff) | |
| download | gcc-7e99af4816cfad578094fcf08e2377f3ed76e201.zip gcc-7e99af4816cfad578094fcf08e2377f3ed76e201.tar.gz gcc-7e99af4816cfad578094fcf08e2377f3ed76e201.tar.bz2 | |
Fix DR_GROUP_GAP for strided accesses (PR 92677)
When dissolving an SLP-only group of accesses, we should only set
the gap to group_size - 1 for normal non-strided groups.
2019-11-29 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR tree-optimization/92677
* tree-vect-loop.c (vect_dissolve_slp_only_groups): Set the gap
to zero when dissolving a group of strided accesses.
gcc/testsuite/
PR tree-optimization/92677
* gcc.dg/vect/pr92677.c: New test.
From-SVN: r278852
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index ab48a05..77c5a98 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -1829,7 +1829,10 @@ vect_dissolve_slp_only_groups (loop_vec_info loop_vinfo) DR_GROUP_FIRST_ELEMENT (vinfo) = vinfo; DR_GROUP_NEXT_ELEMENT (vinfo) = NULL; DR_GROUP_SIZE (vinfo) = 1; - DR_GROUP_GAP (vinfo) = group_size - 1; + if (STMT_VINFO_STRIDED_P (first_element)) + DR_GROUP_GAP (vinfo) = 0; + else + DR_GROUP_GAP (vinfo) = group_size - 1; vinfo = next; } } |