https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97851
Bug ID: 97851
Summary: aarch64: Wrong code with -Os -fmodulo-sched since
r7-879-g43c0068e60
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: acoplan at gcc dot gnu.org
Target Milestone: ---
AArch64 GCC miscompiles the following testcase:
int a, b, c;
short d;
void e(void) {
unsigned f = 0;
for (; f <= 2; f++) {
int g[1];
int h = (long)g;
c = 0;
for (; c < 10; c++)
g[0] = a = 0;
for (; a <= 2; a++)
b = d;
}
}
int main(void) {
e();
if (a != 3)
__builtin_abort();
}
with -Os -fmodulo-sched since r7-879-g43c0068e60ad1518cc6196eeac51eb811fe62f8f.
It seems likely that this is just a latent bug revealed by the above revision,
however (hence tagging as rtl-optimization). Possibly related to PR97440 or
PR97421.
