gcc/testsuite/gcc.dg/tree-ssa/tailcall-6.c

   1 /* PR tree-optimization/43904.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-O1 -foptimize-sibling-calls" } */
   4
   5 typedef __SIZE_TYPE__ size_t;
   6 extern void abort(void);
   7
   8 void *memcpy(void *dest, const void *src, size_t n);
   9
  10 void
  11 buggy_init(void *ptr, size_t size)
  12 {
  13   const char *str = "Hello world!";
  14   memcpy(ptr, &str, size);
  15 }
  16
  17 void
  18 expose_bug(void *ptr, size_t size)
  19 {
  20   const char *str;
  21   memcpy(&str, ptr, size);
  22   if (*str != 'H')
  23     abort ();
  24 }
  25
  26 int
  27 main()
  28 {
  29   const char *ptr;
  30   buggy_init(&ptr, sizeof(ptr));
  31   expose_bug(&ptr, sizeof(ptr));
  32   return 0;
  33 }