gcc/testsuite/gcc.dg/tree-ssa/pr89317.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-ccp1" } */
   3
   4 struct b { int data[16]; };
   5
   6 int foo (struct b *x)
   7 {
   8   int *a = x->data;
   9   int *b = ((int*)x) + 4;
  10   return b - a;
  11 }
  12
  13 int bar (struct b *x)
  14 {
  15   int *a = x->data;
  16   int *b = ((int*)x) + 4;
  17   if (a != b)
  18     return 1;
  19   return 0;
  20 }
  21
  22 int baz (struct b *x)
  23 {
  24   int *a = x->data;
  25   int *b = ((int*)x) + 4;
  26   return (a != b);
  27 }
  28
  29 /* { dg-final { scan-tree-dump "return 4;" "ccp1" } } */
  30 /* { dg-final { scan-tree-dump-times "return 1;" 2 "ccp1" } } */