https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78574
Bug ID: 78574
Summary: ice on valid C code at -O2 and -O3 in both 32- and
64-bit modes on x86_64-linux-gnu (internal compiler
error: Segmentation fault (program cc1))
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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 20161128 (experimental) [trunk revision 242906] (GCC)
$
$ gcc-trunk -O3 small.c
gcc-trunk: internal compiler error: Segmentation fault (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
$ cat small.c
int a, d, f, g;
int b[1];
short h;
int main() {
long j;
int k, i;
for (; j; j++) {
i = 0;
for (; i < 6; i++) {
int l = a, m = d || g;
L:
l ^ m | a;
}
b[j + 1] = 2;
++k;
for (; g; g++) {
d ^= h;
if (f)
for (;;)
;
}
}
if (k)
goto L;
}
$
