[Bug tree-optimization/106414] New: wrong code at -O1 and above on x86_64-linux-gnu
zhendong.su at inf dot ethz.ch
gcc-bugzilla@gcc.gnu.org
Fri Jul 22 17:31:35 GMT 2022
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106414
Bug ID: 106414
Summary: wrong code at -O1 and above on x86_64-linux-gnu
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.
[672] % 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/13.0.0/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
--with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.0 20220722 (experimental) [master r13-1799-g41da4070a2a] (GCC)
[673] %
[673] % gcctk -O0 small.c; ./a.out
[674] % gcctk -O1 small.c
[675] % ./a.out
Aborted
[676] % cat small.c
int printf(const char *, ...);
int a, c, e;
const int b = 1;
char d;
int main() {
a = ~(e || 0) ^ b & ~d;
d = ~(a | ~2);
if (d)
__builtin_abort();
return 0;
}
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