gcc/testsuite/gcc.dg/pr39443.c

   1 /* PR middle-end/39443 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2" } */
   4 /* { dg-final { scan-assembler-not "memcmp" } } */
   5
   6 typedef __SIZE_TYPE__ size_t;
   7
   8 extern int memcmp (const void *s1, const void *s2, size_t n)
   9   __attribute__ ((__nothrow__, __pure__));
  10 extern __typeof (memcmp) memcmp __asm__ ("memory_compare");
  11
  12 int
  13 test (char *s, char *t, int cnt)
  14 {
  15   if (__builtin_expect (cnt, 0))
  16     return memcmp (s, t, cnt);
  17   return 0;
  18 }