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/* { dg-do compile } */

/* { dg-options "-O2 -fdump-tree-optimized" } */

int a, b, c, d;

extern int printf (const char *, ...);

int main(void)

{

  int e;

  int f;

  /* We should be able to transform these into the same expression, and only have two additions.  */

  e = a + b;

  e = e + c;

  f = c + a;

  f = f + b;

  printf ("%d %d\n", e, f);

}

/* We cannot reassociate these expressions because of undefined signed

   integer overflow.  Instead the value-numberer has to be extended

   to canonicalize these expressions.  */

/* { dg-final { scan-tree-dump-times "b.._. \\\+ a.._." 1 "optimized" { xfail *-*-* } } } */

/* { dg-final { scan-tree-dump-times " \\\+ " 2 "optimized" { xfail *-*-* } } } */

/* { dg-final { cleanup-tree-dump "optimized" } } */