gcc/testsuite/gcc.dg/pr69172.c

   1 /* PR tree-optimization/69172 - ICE in make_ssa_name_fn,
   2    at tree-ssanames.c:266 */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O2" } */
   5
   6 int a;
   7
   8 void *
   9 f1 (void)
  10 {
  11   int *b = &a, *c = &a;
  12   return __builtin___mempcpy_chk (b, c, sizeof (int), 0);
  13 }
  14
  15 void *
  16 f2 (void)
  17 {
  18   int *b = &a;
  19   return __builtin___mempcpy_chk (b, b, sizeof (int), 0);
  20 }
  21
  22 void *
  23 f3 (void)
  24 {
  25   return __builtin___mempcpy_chk (&a, &a, sizeof (int), 0);
  26 }
  27
  28 void *
  29 f4 (int x)
  30 {
  31   int *b = &a, *c = &a;
  32   return __builtin___mempcpy_chk (b, c, x, 0);
  33 }
  34
  35 void *
  36 f5 (int x)
  37 {
  38   int *b = &a;
  39   return __builtin___mempcpy_chk (b, b, x, 0);
  40 }
  41
  42 void *
  43 f6 (int x)
  44 {
  45   return __builtin___mempcpy_chk (&a, &a, x, 0);
  46 }
  47
  48 /* The calls above violate strict aliasing.  Eliminate the -Wrestrict
  49    warnings they trigger.
  50   { dg-prune-output "\\\[-Wrestrict]" } */