[Bug tree-optimization/18694] [4.0 regression] loop miscompilation at -O1 (-ftree-ch)
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-09 01:33 -------
And here is a testcase which aborts and it is independent of storing to memory:
extern void abort (void);
void
divisors_bug(long t, long e, long P)
{
long int tmp;
long int act_d;
long int old_d;
long int d;
long int j;
d = t + 1;
old_d = t;
j = e;
while (j != 0) {
act_d = d;
tmp = old_d;
while (tmp < act_d) {
d++;
tmp++;
}
if (tmp != act_d)
abort ();
old_d = act_d;
j--;
}
}
int main(void)
{
divisors_bug(0,2,2);
return 0;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18694
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