gcc/testsuite/gcc.dg/tree-ssa/ssa-ccp-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -fdump-tree-optimized" } */
   3
   4 /* Check that cprop works for assignments to array elements and structs.  */
   5
   6 struct foo {
   7   int a;
   8 };
   9
  10 extern void link_error (void);
  11
  12 void
  13 test9 (struct foo f)
  14 {
  15   f.a = 0;
  16   if (f.a != 0)
  17     link_error ();
  18 }
  19
  20 void
  21 test99 (struct foo *f)
  22 {
  23   f->a = 0;
  24   if (f->a != 0)
  25     link_error ();
  26 }
  27
  28 void
  29 test999 (int *arr)
  30 {
  31   *arr = 0;
  32   if (*arr != 0)
  33     link_error ();
  34 }
  35
  36 void
  37 test9999 (int *arr)
  38 {
  39   arr[13] = 0;
  40   if (arr[13] != 0)
  41     link_error ();
  42 }
  43
  44 void
  45 test99999 (int *arr, int j)
  46 {
  47   arr[j] = 0;
  48   if (arr[j] != 0)
  49     link_error ();
  50 }
  51
  52 /* There should be no link_error calls, if there is any, the
  53    optimization has failed */
  54 /* { dg-final { scan-tree-dump-times "link_error" 0 "optimized"} } */
  55 /* { dg-final { cleanup-tree-dump "optimized" } } */