https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83126
Bug ID: 83126
Summary: [8 Regression] ICE in
transform_to_exit_first_loop_alt, at
tree-parloops.c:1713
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20171119 snapshot (r254939) ICEs when compiling the following
snippet w/ -O1 -ftree-parallelize-loops=2 -floop-parallelize-all:
void
ew (unsigned short int c9)
{
int e1;
for (;;)
{
unsigned int *by = &e1;
int *fd;
*fd = c9;
fd = *fd;
if (*fd != 0)
for (*by = 0; *by < 2; ++*by)
c9 *= e1;
}
}
% gcc-8.0.0-alpha20171119 -O1 -ftree-parallelize-loops=2 -floop-parallelize-all
-w -c dbuks5p2.c
during GIMPLE pass: parloops
dbuks5p2.c: In function 'ew':
dbuks5p2.c:2:1: internal compiler error: in transform_to_exit_first_loop_alt,
at tree-parloops.c:1713
ew (unsigned short int c9)
^~
0xcf558a transform_to_exit_first_loop_alt
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:1711
0xcf5eac try_transform_to_exit_first_loop_alt
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:1835
0xcf7d45 gen_parallel_loop
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:2379
0xcf826c parallelize_loops
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:3366
0xcf852f execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20171119/work/gcc-8-20171119/gcc/tree-parloops.c:3448
