https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110924
Bug ID: 110924
Summary: ICE on valid code at -O{s,2,3} on x86_64-linux-gnu:
verify_ssa failed
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: ---
It appears to be a recent regression.
Compiler Explorer: https://godbolt.org/z/z9oPe5bnx
[608] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/home/suz/suz-local/software/local/gcc-trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20230805 (experimental) (GCC)
[609] %
[609] % gcctk -O2 small.c
small.c: In function ‘main’:
small.c:8:5: error: stmt with wrong VUSE
8 | int main() {
| ^~~~
# VUSE <.MEM_11>
e.3_2 = e;
expected .MEM_12
during GIMPLE pass: sink
small.c:8:5: internal compiler error: verify_ssa failed
0x124c54d verify_ssa(bool, bool)
../../gcc-trunk/gcc/tree-ssa.cc:1203
0xed05e5 execute_function_todo
../../gcc-trunk/gcc/passes.cc:2095
0xed0a3b execute_todo
../../gcc-trunk/gcc/passes.cc:2142
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[610] %
[610] % cat small.c
int a[1], b, c, d, e, f, g;
void h(int i, int j) {
int *k = 0;
if (*k)
h(0, 0);
g = i && d;
}
int main() {
if (c)
goto l;
if (!a)
while (1) {
f = 1;
while (f)
h(b && main(), e);
while (1)
;
l:;
}
return 0;
}
