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| author | Richard Biener <rguenther@suse.de> | 2025-01-20 14:25:31 +0100 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2025-01-20 15:48:48 +0100 |
| commit | 7b64f757a8df8efd989000baa667279f8957442e (patch) | |
| tree | 4b004aa55356c948671c2233e1bdca777cd05c8b /gcc | |
| parent | 10e98638998745ebc3888a20e661a8364e88ea3a (diff) | |
| download | gcc-7b64f757a8df8efd989000baa667279f8957442e.zip gcc-7b64f757a8df8efd989000baa667279f8957442e.tar.gz gcc-7b64f757a8df8efd989000baa667279f8957442e.tar.bz2 | |
tree-optimization/117875 - missed SLP vectorization
There's a discrepancy in SLP vs non-SLP vectorization that SLP build
does not handle plain SSA copies (which should have been elimiated
earlier). But this now bites back since non-SLP happily handles them,
causing a regression with --param vect-force-slp=1 which is now default,
resulting in a big performance regression in 456.hmmer.
So the following restores parity between SLP and non-SLP here, defering
the missed copy elimination to later (PR118565).
PR tree-optimization/117875
* tree-vect-slp.cc (vect_build_slp_tree_1): Handle SSA copies.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-vect-slp.cc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc index 1d8e62e..5d9a206 100644 --- a/gcc/tree-vect-slp.cc +++ b/gcc/tree-vect-slp.cc @@ -1522,7 +1522,8 @@ vect_build_slp_tree_1 (vec_info *vinfo, unsigned char *swap, && TREE_CODE_CLASS (tree_code (rhs_code)) != tcc_comparison && rhs_code != VIEW_CONVERT_EXPR && rhs_code != CALL_EXPR - && rhs_code != BIT_FIELD_REF) + && rhs_code != BIT_FIELD_REF + && rhs_code != SSA_NAME) { if (dump_enabled_p ()) dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, |