[Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown

[rguenth at gcc dot gnu dot org]

------- Comment #39 from rguenth at gcc dot gnu dot org  2007-10-25 11:06 
-------
No, in general noreturn functions cannot be treated as novops.  Consider

void __attribute__((noreturn,noinline)) my_main(int *ret)
{
  exit(*ret);
}

int main()
{
  int ret = 0;
  my_main (&ret);
}

without VOPs we would remove the store to ret.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32921