https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102776
Bug ID: 102776
Summary: [12 regression] g++.dg/vect/slp-pr98855.cc XPASSes
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Target: i?86-*-*, x86-*-*, armv8l-unknown-linux-gnueabihf,
aarch64-suse-linux-gnu
Between 20210904 (7b7395409c7aaef493337479c7fd586e52aea3d1) and 20210906
(78b34cd8a803aa89e64949e99ce2e6b4f64d6b54),
32-bit g++.dg/vect/slp-pr98855.cc began to XPASS on several targets:
XPASS: g++.dg/vect/slp-pr98855.cc -std=c++14 scan-tree-dump-times slp1 "not
vectorized: vectorization is not profitable" 2
XPASS: g++.dg/vect/slp-pr98855.cc -std=c++17 scan-tree-dump-times slp1 "not
vectorized: vectorization is not profitable" 2
XPASS: g++.dg/vect/slp-pr98855.cc -std=c++2a scan-tree-dump-times slp1 "not
vectorized: vectorization is not profitable" 2
XPASS: g++.dg/vect/slp-pr98855.cc -std=c++98 scan-tree-dump-times slp1 "not
vectorized: vectorization is not profitable" 2
This might be due to
commit a3fb781d4b341c0d50ef1b92cd3e8734e673ef18
Author: Richard Biener <rguent...@suse.de>
Date: Thu Sep 2 14:48:10 2021 +0200
tree-optimization/102176 - locally compute participating SLP stmts
