gcc/testsuite/gcc.dg/tree-ssa/reassoc-20.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 unsigned int a, b, c, d;
   5 extern int printf (const char *, ...);
   6 int main(void)
   7 {
   8   unsigned int e;
   9   unsigned int f;
  10   /* We should be able to transform these into the same expression, and only have two additions.  */
  11   e = a + b;
  12   e = e + c;
  13   f = c + a;
  14   f = f + b;
  15   printf ("%d %d\n", e, f);
  16 }
  17
  18 /* { dg-final { scan-tree-dump-times "\[ab\].._. \\\+ \[ab\].._." 1 "optimized" } } */
  19 /* { dg-final { scan-tree-dump-times " \\\+ " 2 "optimized" } } */