gcc/testsuite/gcc.dg/pr38984.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-delete-null-pointer-checks -fdump-tree-optimized -fno-isolate-erroneous-paths-dereference" }
   3  * */
   4
   5 int f(int *p)
   6 {
   7   int a = *p;
   8   int *null = 0;
   9   *null = 5;
  10   return *p == a;
  11 }
  12
  13 /* { dg-final { scan-tree-dump-times "\\\*p" 2 "optimized" } } */
  14 /* { dg-final { scan-tree-dump-not "return 1" "optimized" } } */
  15 /* { dg-final { cleanup-tree-dump "optimized" } } */
  16
  17