https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86319
Bug ID: 86319
Summary: [9 Regression] ICE in vect_transform_stmt
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-9.0.0-alpha20180624 snapshot (r261998) ICEs when compiling the following
snippet w/ -O3 (-Ofast):
int y4[3][2];
int ud;
void
ky (void)
{
for (ud = 0; ud < 3; ++ud)
{
int mo;
for (mo = 0; mo < 2; ++mo)
y4[ud][mo] = 0;
}
}
% MALLOC_PERTURB_=1 gcc-9.0.0-alpha20180624 -O3 -c sofbe30d.c
during GIMPLE pass: vect
sofbe30d.c: In function 'ky':
sofbe30d.c:5:1: internal compiler error: Segmentation fault
ky (void)
^~
0xc867bf crash_signal
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/toplev.c:324
0xebcf20 vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*,
_slp_instance*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/tree-vect-stmts.c:9607
0xebf573 vect_transform_loop_stmt
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/tree-vect-loop.c:8357
0xecbb91 vect_transform_loop(_loop_vec_info*)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/tree-vect-loop.c:8567
0xeed29d try_vectorize_loop_1
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/tree-vectorizer.c:757
0xeedcb1 vectorize_loops()
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180624/work/gcc-9-20180624/gcc/tree-vectorizer.c:891
Note glibc-specific MALLOC_PERTURB_=1. Pre-initializing allocated memory blocks
seems to be necessary to uncover the issue.
