https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84650
Bug ID: 84650
Summary: [8 Regression] [graphite] ICE: Segmentation fault (in
create_new_iv)
Product: gcc
Version: 8.0
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-8.0.0-alpha20180225 snapshot (r257975) ICEs when compiling the following
snippet w/ -O2 (-O3, -Ofast, -Os) -fgraphite-identity -fno-tree-copy-prop
--param lim-expensive=3:
unsigned int dj;
void
np (void)
{
const unsigned int uw = 2;
unsigned int eu;
for (eu = 0; eu < uw; ++eu)
{
for (dj = 0; dj < uw; ++dj)
{
}
eu -= !!(dj - uw - 1);
}
}
% gcc-8.0.0-alpha20180225 -O2 -fgraphite-identity -fno-tree-copy-prop --param
lim-expensive=3 -c bl9jevma.c
during GIMPLE pass: ivopts
bl9jevma.c: In function 'np':
bl9jevma.c:4:1: internal compiler error: Segmentation fault
np (void)
^~
0xca1fcf crash_signal
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/toplev.c:325
0xdf7f25 create_new_iv
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/tree-ssa-loop-ivopts.c:6793
0xdf7f25 create_new_ivs
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/tree-ssa-loop-ivopts.c:6819
0xdf7f25 tree_ssa_iv_optimize_loop
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/tree-ssa-loop-ivopts.c:7582
0xdf7f25 tree_ssa_iv_optimize()
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/tree-ssa-loop-ivopts.c:7618
0xe153b0 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180225/work/gcc-8-20180225/gcc/tree-ssa-loop.c:500
