https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81747
Bug ID: 81747
Summary: [8 Regression] ICE in operator[], at vec.h:749
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: powerpc-*-linux-gnu*, powerpcspe-*-linux-gnu*
At least gcc-8.0.0-alpha20170730 and gcc-8.0.0-alpha20170806 snapshots ICE when
compiling the following snippet w/ -O2 (-O3, -Ofast) -funroll-loops:
int
ij (int pu, int x5)
{
int u7 = 3;
unsigned int fa;
for (fa = 533090919; fa < 1; ++fa)
{
pu = 1;
while (pu != 0)
{
ed:
u7 %= 1;
}
}
if (x5 < 1)
{
if (fa != 3062256262 && u7 != 0)
goto ed;
return x5;
}
}
% powerpc-e300c3-linux-gnu-gcc-8.0.0-alpha20170806 -O2 -funroll-loops -c -w
whfolj7o.c
during RTL pass: cse2
whfolj7o.c: In function 'ij':
whfolj7o.c:23:1: internal compiler error: in operator[], at vec.h:749
}
^
0x135560c vec<edge_def*, va_gc, vl_embed>::operator[](unsigned int)
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20170806/work/gcc-8-20170806/gcc/vec.h:749
0x135560c cse_find_path
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20170806/work/gcc-8-20170806/gcc/cse.c:6333
0x135560c cse_main
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20170806/work/gcc-8-20170806/gcc/cse.c:6729
0x13557a6 rest_of_handle_cse2
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20170806/work/gcc-8-20170806/gcc/cse.c:7632
0x13557a6 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-8.0.0_alpha20170806/work/gcc-8-20170806/gcc/cse.c:7685
