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

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3 static struct a {int magic1,b;} a;
   4 volatile int magic2;
   5 static struct b {int a,b,c,d,e,f;} magic3;
   6
   7 struct b foo();
   8
   9 void
  10 t()
  11 {
  12  a.magic1 = 1;
  13  magic2 = 1;
  14  magic3 = foo();
  15 }
  16 /* { dg-final { scan-tree-dump-not "magic1" "optimized"} } */
  17 /* { dg-final { scan-tree-dump-not "magic3" "optimized"} } */
  18 /* { dg-final { scan-tree-dump "magic2" "optimized"} } */
  19 /* { dg-final { scan-tree-dump "foo" "optimized"} } */
  20