gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-dse1" } */
   3
   4 int a, b, c;
   5 int
   6 foo ()
   7 {
   8   int *p;
   9   if (c)
  10     p = &a;
  11   else
  12     p = &b;
  13
  14   *p = 3;
  15   *p = 4;
  16   return *p;
  17 }
  18
  19
  20 /* We should eliminate the first assignment to *p, but not the second.  */
  21 /* { dg-final { scan-tree-dump-times " = 3" 0 "dse1"} } */
  22 /* { dg-final { scan-tree-dump-times " = 4" 1 "dse1"} } */
  23
  24 /* { dg-final { cleanup-tree-dump "dse1" } } */