gcc/testsuite/gcc.dg/pr69172.c

   1 /* PR tree-optimization/69172 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2" } */
   4
   5 int a;
   6
   7 void *
   8 f1 (void)
   9 {
  10   int *b = &a, *c = &a;
  11   return __builtin___mempcpy_chk (b, c, sizeof (int), 0);
  12 }
  13
  14 void *
  15 f2 (void)
  16 {
  17   int *b = &a;
  18   return __builtin___mempcpy_chk (b, b, sizeof (int), 0);
  19 }
  20
  21 void *
  22 f3 (void)
  23 {
  24   return __builtin___mempcpy_chk (&a, &a, sizeof (int), 0);
  25 }
  26
  27 void *
  28 f4 (int x)
  29 {
  30   int *b = &a, *c = &a;
  31   return __builtin___mempcpy_chk (b, c, x, 0);
  32 }
  33
  34 void *
  35 f5 (int x)
  36 {
  37   int *b = &a;
  38   return __builtin___mempcpy_chk (b, b, x, 0);
  39 }
  40
  41 void *
  42 f6 (int x)
  43 {
  44   return __builtin___mempcpy_chk (&a, &a, x, 0);
  45 }