gcc/testsuite/g++.dg/tree-ssa/pointer-reference-alias.C

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 int f(int *a)
   5 {
   6   int &b = *a;
   7   b = 0;
   8   return *a;
   9 }
  10
  11 /* There should be only one dereferencing of a. */
  12 /* { dg-final { scan-tree-dump-times "\\*a" 1 "optimized" } } */
  13 /* { dg-final { cleanup-tree-dump "optimized" } } */