https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79386
Bug ID: 79386
Summary: [7 Regression] ICE: segmentation fault in cprop w/ -O2
on 32-bit BE powerpc
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-*-linux-gnu*
At least gcc-7.0.0-alpha20170129 and gcc-7.0.0-alpha20170205 snapshots ICE when
compiling the following snippet for 32-bit BE powerpc targets w/ -O2:
int fy, er;
int
ot (int dh)
{
int t5;
int *ge, *ys;
if (er == 0)
{
t5 = 0;
ys = &er;
ge = &er;
}
else
{
int ay;
t5 = 1;
for (ay = 0; ay < 9; ++ay)
t5 *= 3;
ys = t5;
ge = &dh;
}
*ys = t5 < 3;
if (*ys != 0)
{
int sr;
er += (fy != 0) ? fy : 1;
if (sr != 0 || dh != 0)
*ge = 0;
if (er >= 0)
{
if (sr != 0)
sr = dh;
if (*ge / sr != 0)
for (;;)
{
}
}
}
return er * (fy != 0 && *ge != 0);
}
% powerpc-e300c3-linux-gnu-gcc-7.0.0-alpha20170205 -O2 -w -c rxffdvao.c
rxffdvao.c: In function 'ot':
rxffdvao.c:46:1: internal compiler error: Segmentation fault
}
^
0x2ed19bc7d19 crash_signal
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/toplev.c:333
0x2ed1a25f149 find_bypass_set
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1474
0x2ed1a25f149 bypass_block
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1597
0x2ed1a25f149 bypass_conditional_jumps
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1731
0x2ed1a25f149 one_cprop_pass
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1874
0x2ed1a25f149 execute_rtl_cprop
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1918
0x2ed1a25f149 execute
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cprop.c:1956
