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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-11-06 14:03:08 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-11-06 14:03:08 +0000 |
| commit | 4b205bf82d06c4d9d0ae7b78e54c712d79d5b021 (patch) | |
| tree | 2d4311cdbc02bb49fa26ddb681528e5306796259 /gcc | |
| parent | 4653da0b6ec2a5c272d9cd98a970f0037f1a5789 (diff) | |
| download | gcc-4b205bf82d06c4d9d0ae7b78e54c712d79d5b021.zip gcc-4b205bf82d06c4d9d0ae7b78e54c712d79d5b021.tar.gz gcc-4b205bf82d06c4d9d0ae7b78e54c712d79d5b021.tar.bz2 | |
Don't vectorise single-iteration epilogues
With a later patch I saw a case in which we peeled a single iteration
for gaps but didn't need to peel further iterations to make up a full
vector. We then tried to vectorise the single-iteration epilogue.
2019-11-06 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* tree-vect-loop.c (vect_analyze_loop): Only try to vectorize
the epilogue if there are peeled iterations for it to handle.
From-SVN: r277886
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-vect-loop.c | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1ff3d4b..daf1194 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-11-06 Richard Sandiford <richard.sandiford@arm.com> + + * tree-vect-loop.c (vect_analyze_loop): Only try to vectorize + the epilogue if there are peeled iterations for it to handle. + 2019-11-06 Claudiu Zissulescu <claziss@synopsys.com> * config/arc/arc.c (arc_split_ior): Add asserts. diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index d982e1a..788cc87 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -2459,6 +2459,7 @@ vect_analyze_loop (class loop *loop, vec_info_shared *shared) vect_epilogues = (!loop->simdlen && loop->inner == NULL && PARAM_VALUE (PARAM_VECT_EPILOGUES_NOMASK) + && LOOP_VINFO_PEELING_FOR_NITER (first_loop_vinfo) /* For now only allow one epilogue loop. */ && first_loop_vinfo->epilogue_vinfos.is_empty ()); |