gcc/testsuite/gcc.dg/tree-ssa/ssa-dce-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fno-tree-fre -fdump-tree-cddce1" } */
   3
   4 int foo(int b)
   5 {
   6   int a[128];
   7   a[b] = 1;
   8   if (b)
   9     {
  10       b = 2;
  11       a[2] = 0;
  12     }
  13   a[2] = 3;
  14   return a[2] + b;
  15 }
  16
  17 /* Verify DCE removes all accesses to a but the last store and the
  18    read from a[2].  */
  19 /* { dg-final { scan-tree-dump-times "a\\\[\[^\n\]\\\]" 2 "cddce1" } } */
  20 /* { dg-final { cleanup-tree-dump "cddce1" } } */