https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96548
Bug ID: 96548
Summary: [11 Regression] ICE in compute_live_loop_exits, at
tree-ssa-loop-manip.c:247
Product: gcc
Version: 11.0
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-11.0.0-alpha20200809 snapshot (g:71197a5d13d0b540a9b5efe7ae2512d76386e9d1)
ICEs when compiling the following testcase w/ -O1:
int c9, d3;
void
sg (int *rs, int f2)
{
for (;;)
{
if (*rs < 1)
__builtin_unreachable ();
for (c9 = 0; c9 < 1; ++c9)
while (f2 < 1)
++c9;
if (d3)
c9 += !!f2 ? 0 : d3;
}
}
% gcc-11.0.0 -O1 -c tr7hy0bz.c
during GIMPLE pass: lim
tr7hy0bz.c: In function 'sg':
tr7hy0bz.c:4:1: internal compiler error: in compute_live_loop_exits, at
tree-ssa-loop-manip.c:247
4 | sg (int *rs, int f2)
| ^~
0x6d7a54 compute_live_loop_exits
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-manip.c:247
0x6d7a54 add_exit_phis_var
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-manip.c:334
0x6d7a54 add_exit_phis
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-manip.c:356
0x6d7a54 rewrite_into_loop_closed_ssa_1(bitmap_head*, unsigned int, int, loop*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-manip.c:678
0x6d7a54 rewrite_into_loop_closed_ssa_1(bitmap_head*, unsigned int, int, loop*)
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-manip.c:631
0xec3e83 tree_ssa_lim
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-im.c:3126
0xec3e83 execute
/var/tmp/portage/sys-devel/gcc-11.0.0_alpha20200809/work/gcc-11-20200809/gcc/tree-ssa-loop-im.c:3173
