https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85673
Bug ID: 85673
Summary: ICE in create_pre_exit, at mode-switching.c:451
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-checking, ice-on-invalid-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-unknown-linux-gnu
gcc-9.0.0-alpha20180429 snapshot (r259749), 8.1, 7.3, 6.3 all ICE when
compiling the following snippet w/ -mavx -O2 -fgcse-sm -fschedule-insns
-fselective-scheduling -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -fno-tree-dse -fno-tree-ter --param
selsched-max-lookahead=34:
int fn, l0, mo;
int
kg ();
int
pm (int *i2, int a8)
{
int v8;
a8 += kg ();
v8 = a8 < fn;
v8 = mo < v8;
v8 = v8 < i2;
v8 = mo < v8;
mo += v8;
a8 += l0;
l0 += a8;
for (fn = 0; fn < 1; ++fn)
{
}
for (mo = 0; mo < 1; ++mo)
{
}
return i2;
}
% x86_64-unknown-linux-gnu-gcc-9.0.0-alpha20180429 -mavx -O2 -fgcse-sm
-fschedule-insns -fselective-scheduling -fno-dce -fno-forward-propagate
-fno-rerun-cse-after-loop -fno-tree-dse -fno-tree-ter --param
selsched-max-lookahead=34 -w -c cyrbs0xx.c
during RTL pass: vzeroupper
cyrbs0xx.c: In function 'pm':
cyrbs0xx.c:29:1: internal compiler error: in create_pre_exit, at
mode-switching.c:451
}
^
0x7372b7 create_pre_exit
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:438
0x7372b7 optimize_mode_switching
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:534
0x7372b7 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/mode-switching.c:892
0xfbc275 rest_of_handle_insert_vzeroupper
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/config/i386/i386.c:898
0xfbc275 execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20180429/work/gcc-9-20180429/gcc/config/i386/i386.c:2518
