https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107195
Bug ID: 107195
Summary: wrong code with "-O1 -fno-tree-ccp" 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: ---
This doesn't fail with 12.2, so looks like a recent regression. Perhaps related
to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172 or
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107194?
Compiler Explorer: https://godbolt.org/z/94E6r84ra
[524] % 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 20221009 (experimental) [master r13-3180-ge95e91eccd0] (GCC)
[525] %
[525] % gcctk -O1 small.c; ./a.out
[526] %
[526] % gcctk -O1 -fno-tree-ccp small.c
[527] % ./a.out
Aborted
[528] %
[528] % cat small.c
int a, b;
int main() {
int c = 0;
if (a)
c = 1;
c = 1 & (a && c) && b;
if (a) {
b = c;
__builtin_abort ();
}
return 0;
}
