https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71908
Bug ID: 71908
Summary: ICE at -Os and above in both 32-bit and 64-bit modes
on x86_64-linux-gnu (get_constraint_for_component_ref)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
Target Milestone: ---
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/usr/local/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160716 (experimental) [trunk revision 238415] (GCC)
$
$ gcc-trunk -O3 small.c
small.c: In function ‘main’:
small.c:10:5: internal compiler error: in get_constraint_for_component_ref, at
tree-ssa-structalias.c:3217
int main() {
^~~~
0xda58ec get_constraint_for_component_ref
../../gcc-source-trunk/gcc/tree-ssa-structalias.c:3217
0xda58ec get_constraint_for_1
../../gcc-source-trunk/gcc/tree-ssa-structalias.c:3485
0xda9500 find_func_aliases
../../gcc-source-trunk/gcc/tree-ssa-structalias.c:4779
0xdaf22e compute_points_to_sets
../../gcc-source-trunk/gcc/tree-ssa-structalias.c:7056
0xdaf22e compute_may_aliases()
../../gcc-source-trunk/gcc/tree-ssa-structalias.c:7414
0xae7924 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1936
0xae84eb execute_todo
../../gcc-source-trunk/gcc/passes.c:2016
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ cat small.c
struct S3 {
int f3;
int f5;
char f6;
int f7;
} b;
int a;
static struct S3 *c = &b;
int *d;
int main() {
int i;
for (;;) {
a = 0;
int **e = &d;
i = 0;
for (; i < 2; i++)
d = &(*c).f5;
*e = d;
**e = 3;
}
return 0;
}
$
