gcc/testsuite/gcc.dg/string-opt-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 char *buffer;
   5 char *test;
   6
   7 #define SIZE 100
   8
   9 char *
  10 __attribute__((noinline))
  11 my_memcpy (char *d, char *s, unsigned l)
  12 {
  13   return __builtin_memcpy (d, s, l);
  14 }
  15
  16 char *
  17 __attribute__((noinline))
  18 my_mempcpy (char *d, char *s, unsigned l)
  19 {
  20   return __builtin_mempcpy (d, s, l);
  21 }
  22
  23 void
  24 run_test (char *d, char *s, unsigned l)
  25 {
  26   char *r = my_mempcpy (d, s, l);
  27   if (r != d + l)
  28     __builtin_abort ();
  29
  30   r = my_memcpy (d, s, l);
  31   if (r != d)
  32     __builtin_abort ();
  33 }
  34
  35 int
  36 main (void)
  37 {
  38   const char* const foo = "hello world";
  39   unsigned l = __builtin_strlen (foo) + 1;
  40
  41   buffer = __builtin_malloc (SIZE);
  42   __builtin_memcpy (buffer, foo, l);
  43   test = __builtin_malloc (SIZE);
  44
  45   run_test (test, buffer, l);
  46
  47   return 0;
  48 }
  49
  50 /* { dg-final { scan-assembler "mempcpy" } } */
  51 /* { dg-final { scan-assembler "memcpy" } } */