https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105727
Bug ID: 105727
Summary: __builtin_constant_p expansion in LTO
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
It's basically follow-up of PR101941 which I noticed during the building of
Linux with LTO w/ KASAN enabled:
$ cat a.c
void memory_is_poisoned(int size) {
if (__builtin_constant_p(size)) __builtin_abort();
}
$ cat b.c
void memory_is_poisoned(int size);
int main(int argc, char **argv) {
memory_is_poisoned(128);
return 0;
}
$ gcc [ab].c -O2 && ./a.out
$ clang [ab].c -flto -O2 && ./a.out
$ gcc [ab].c -flto -O2 && ./a.out
Aborted (core dumped)
