gcc/testsuite/gcc.dg/stack-layout-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-strict-aliasing -fdump-rtl-expand" } */
   3 union U {
   4   int a;
   5   float b;
   6 };
   7 struct A {
   8   union U u1;
   9   char a[100];
  10 };
  11 void bar (struct A *);
  12 void foo ()
  13   {
  14     {
  15       struct A a;
  16       bar (&a);
  17     }
  18     {
  19       struct A a;
  20       bar (&a);
  21     }
  22   }
  23
  24 /* { dg-final { scan-rtl-dump-times "Partition" 1 "expand" } } */