[Bug tree-optimization/33434] [4.3 Regression] -fipa-cp miscompilation

[razya at il dot ibm dot com]

------- Comment #1 from razya at il dot ibm dot com  2007-09-16 10:38 -------
(In reply to comment #0)
> Found this while trying to bootstrap with BOOT_CFLAGS="-O3 -fipa-cp" and it
> miscompiled libcpp/macro.c at the stage2.  Appeared somewhere in between
> r122374 and r124593:
> /* { dg-do run } */
> /* { dg-options "-O3 -fipa-cp" } */
> int k;
> void f1 (int a, int b)
> {
>   if (a)
>     while (b --)
>       k = 1;
>   else
>     if (b != 1)
>       __builtin_abort ();
> }
> int main (void)
> {
>   f1 (1, 1);
>   if (k != 1)
>     __builtin_abort ();
>   return 0;
> }


Looking into it. Razya


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33434