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| author | Richard Biener <rguenther@suse.de> | 2020-11-06 08:34:16 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2020-11-06 08:34:16 +0100 |
| commit | 2210bf6dec4a9868c828af546890805cac353f84 (patch) | |
| tree | 50f12e1adaaab0449f89bdfd063569098bcda14d /gcc | |
| parent | c283a711c850efaab4fe3bca5ef7200eb854bba1 (diff) | |
| download | gcc-2210bf6dec4a9868c828af546890805cac353f84.zip gcc-2210bf6dec4a9868c828af546890805cac353f84.tar.gz gcc-2210bf6dec4a9868c828af546890805cac353f84.tar.bz2 | |
tree-optimization/97733 - fix SLP of reductions with zero relevant
This adds a missing check.
2020-11-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/97733
* tree-vect-slp.c (vect_analyze_slp_instance): If less
than two reductions were relevant or live do nothing.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-vect-slp.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c index 9c63983..4d1f17b 100644 --- a/gcc/tree-vect-slp.c +++ b/gcc/tree-vect-slp.c @@ -2539,6 +2539,9 @@ vect_analyze_slp_instance (vec_info *vinfo, if (STMT_VINFO_RELEVANT_P (next_info) || STMT_VINFO_LIVE_P (next_info)) scalar_stmts.quick_push (next_info); + /* If less than two were relevant/live there's nothing to SLP. */ + if (scalar_stmts.length () < 2) + return false; } /* Build the tree for the SLP instance. */ |