[Bug ipa/97695] [11 Regression] wrong code at -O3 on x86_64-pc-linux-gnu since r11-4587-gae7a23a3fab74.
zhendong.su at inf dot ethz.ch
gcc-bugzilla@gcc.gnu.org
Tue Nov 3 20:58:08 GMT 2020
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97695
--- Comment #6 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
Another repro for the same issue (as -fno-ipa-cp also avoids it):
[579] % gcctk -O2 small.c; ./a.out
[580] % gcctk -O3 small.c; ./a.out
Aborted
[581] % gcctk -O3 -fno-ipa-cp small.c; ./a.out
[582] %
[582] % cat small.c
int a, b, c, *d = &c, e, f;
char g (char h)
{
return h < 0 || a || h ? h : 0;
}
static int i (int h)
{
f = g (1);
e = *d = f && h;
a = 0;
return b;
}
int main ()
{
e = i (1);
while (b)
i (0);
if (!c)
__builtin_abort ();
return 0;
}
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