https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82913
Bug ID: 82913
Summary: [8 Regression] ICE: Segmentation fault in
try_merge_compare
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-pc-linux-gnu
gcc-8.0.0-alpha20171105 snapshot (r254432) ICEs when compiling the following
snippet w/ -O2, -O3, or -Ofast:
unsigned int iy;
unsigned long int pp;
int
vr (void)
{
++iy;
pp = 0;
}
unsigned long int
pu (int cq)
{
if (!vr () || !iy)
{
int wd = iy != pp;
if (wd != cq)
return iy;
}
return 0;
}
% x86_64-pc-linux-gnu-gcc-8.0.0-alpha20171105 -O2 -c tcj0zno5.c
during RTL pass: cmpelim
tcj0zno5.c: In function 'pu':
tcj0zno5.c:23:1: internal compiler error: Segmentation fault
}
^
0xc697ef crash_signal
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/toplev.c:324
0x132e310 try_merge_compare
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:690
0x132e310 try_eliminate_compare
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:730
0x132e310 execute_compare_elim_after_reload
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:873
0x132e310 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171105/work/gcc-8-20171105/gcc/compare-elim.c:916
