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| author | Andrew Stubbs <ams@codesourcery.com> | 2019-12-17 13:01:36 +0000 |
|---|---|---|
| committer | Andrew Stubbs <ams@gcc.gnu.org> | 2019-12-17 13:01:36 +0000 |
| commit | 8354bb0ebe5be8427c3795d0a32ad0564bf71489 (patch) | |
| tree | 0cca6c23d69ed1ffb2d54c0cd1df14d531f982a0 /gcc/tree-vect-loop.c | |
| parent | b92d1124e15db0186e616a7c9d4f8e69d92aa015 (diff) | |
| download | gcc-8354bb0ebe5be8427c3795d0a32ad0564bf71489.zip gcc-8354bb0ebe5be8427c3795d0a32ad0564bf71489.tar.gz gcc-8354bb0ebe5be8427c3795d0a32ad0564bf71489.tar.bz2 | |
Add pointer to PR92772
2019-12-17 Andrew Stubbs <ams@codesourcery.com>
* tree-vect-loop.c (vect_create_epilog_for_reduction): Mention pr92772
in the comments.
From-SVN: r279460
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 353a5ff..68699f2 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -4534,7 +4534,10 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info, containing the last time the condition passed for that vector lane. The first match will be a 1 to allow 0 to be used for non-matching indexes. If there are no matches at all then the vector will be all - zeroes. */ + zeroes. + + PR92772: This algorithm is broken for architectures that support + masked vectors, but do not provide fold_extract_last. */ if (STMT_VINFO_REDUC_TYPE (reduc_info) == COND_REDUCTION) { auto_vec<std::pair<tree, bool>, 2> ccompares; |