https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104525
Bug ID: 104525
Summary: timeout on signed overflow at O0 fwrapv
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: guojiufu at gcc dot gnu.org
Target Milestone: ---
When checking the case in PR104521, a timeout occurs on the case at ppc64le.
The timeout also occurs with -O0 -fwrapv (without -fwrapv, the signed overflow
which would be a UB). This issue seems to exist for a long time (gcc6).
> cat small.c
char a, b, c;
int main() {
unsigned char d = 1;
while (1) {
if (c >= a) {
for (c = 0; c != -4; c -= 3) {
while (!d)
b = 0;
continue;
}
}
d = ~a;
if (!d)
continue;
return 0;
}
}
> gcc -fwrapv -O0 small.c ; timeout -s 9 5 ./a.out
Killed
