gcc/testsuite/gcc.dg/tree-ssa/pr32964.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 union A
   5 {
   6  float a;
   7 };
   8
   9 float t(float a)
  10 {
  11   union A a1, a2, a3;
  12   int i;
  13
  14   a1.a = a;
  15   for(i = 0; i<100; i++)
  16     {
  17       a2 = a1;
  18       a2.a += a;
  19       a1 = a2;
  20   }
  21   a3 = a1;
  22   return a3.a;
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "union" 0 "optimized"} } */
  26 /* { dg-final { cleanup-tree-dump "optimized" } } */