https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103188
Bug ID: 103188
Summary: ICE on valid code at -O2 and -O3 on x86_64-linux-gnu:
Segmentation fault
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
[635] % gcctk -O2 small.c
gcctk: internal compiler error: Segmentation fault signal terminated program
cc1
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
[636] %
[636] %
[636] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++
--disable-werror --enable-multilib --with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20211111 (experimental) [master r12-5143-ga97fdde627e] (GCC)
[637] %
[637] % gcctk -O1 small.c; ./a.out
[638] %
[638] % gcctk -O2 small.c
gcctk: internal compiler error: Segmentation fault signal terminated program
cc1
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
[639] %
[639] % cat small.c
int a, b, c, d = 10, e = 1, f, g, h, i;
int main() {
int j = -1;
k:
h = c;
l:
c = ~c;
if (e)
m:
a = 0;
if (j > 1)
goto m;
if (!e)
goto l;
if (c)
goto p;
n:
goto m;
o:
if (f) {
if (g)
goto k;
j = 0;
p:
if (d)
goto o;
goto n;
}
if (i)
goto l;
for (; a < 1; a++)
while (a > d)
b++;
return 0;
}
