https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99253
Bug ID: 99253
Summary: tree-vect-loop wrong code
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: stefansf at linux dot ibm.com
Target Milestone: ---
Target: s390x, x86_64-*-*
int a = 0;
static int b = 0;
long c = 0;
int
main() {
for (int d = 0; d < 8; d++) {
a ^= c;
b = a;
a ^= 1;
}
if (b != 1)
__builtin_abort();
return 0;
}
Aborts when built with:
gcc -O3 t.c
Bisection stops at commit 04bff1bbfc11a974342c0eb0c0d65d902e36e82e on IBM Z and
at commit b7ff7cef5005721e78d6936bed3ae1c059b4e8d2 on x86 ¯\_(ツ)_/¯
