https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84301
Bug ID: 84301
Summary: ICE in create_pre_exit, at mode-switching.c:451
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-checking
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-alpha20180204 snapshot (r257367), 7.2, 6.3, 5.4 all ICE when
compiling the following snippet w/ -march=bdver1 -O1 -fexpensive-optimizations
-fschedule-insns -fselective-scheduling -fno-dce -fno-tree-dce --param
max-pending-list-length=0 --param selsched-max-lookahead=2 and checking
enabled:
int lr;
long int xl;
int
v4 (void)
{
int mp;
++xl;
mp = (lr - xl) > 1;
}
% gcc-8.0.0-alpha20180204 -march=bdver1 -O1 -fexpensive-optimizations
-fschedule-insns -fselective-scheduling -fno-dce -fno-tree-dce --param
max-pending-list-length=0 --param selsched-max-lookahead=2 -c fmzjfzde.c
during RTL pass: vzeroupper
fmzjfzde.c: In function 'v4':
fmzjfzde.c:11:1: internal compiler error: in create_pre_exit, at
mode-switching.c:451
}
^
0x7312a3 create_pre_exit
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180204/work/gcc-8-20180204/gcc/mode-switching.c:438
0x7312a3 optimize_mode_switching
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180204/work/gcc-8-20180204/gcc/mode-switching.c:534
0x7312a3 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180204/work/gcc-8-20180204/gcc/mode-switching.c:892
0xfa5675 rest_of_handle_insert_vzeroupper
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180204/work/gcc-8-20180204/gcc/config/i386/i386.c:894
0xfa5675 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180204/work/gcc-8-20180204/gcc/config/i386/i386.c:2514
