[Bug tree-optimization/37242] missed FRE opportunity because of signedness of addition

[bonzini at gnu dot org]

------- Comment #4 from bonzini at gnu dot org  2008-08-27 06:41 -------
Minimized testcase:

int m(int *y, int x)
{
  int a = y[x + 1];
  int b = y[++x];
  return a - b;
}

should be optimized to "return 0"


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37242