1  /* PR middle-end/95189 - memcmp being wrongly stripped like strcmp
       2     { dg-do run }
       3     { dg-options "-O2 -Wall" } */
       4  
       5  #define AB_D "ab\0d"
       6  #define ABCDEF_H "abcdef\0h"
       7  #define ABCDEFGHIJKLMN_P "abcdefghijklmn\0p"
       8  
       9  char ab_d[] = AB_D;
      10  char abcdef_h[] = ABCDEF_H;
      11  
      12  extern int strncmp (const char*, const char*, __SIZE_TYPE__);
      13  
      14  __attribute__((noipa)) void sink (const void *p, ...) { (void)&p; }
      15  
      16  #define strncmp(a, b, n) (sink (a, b), strncmp (a, b, n))
      17  
      18  int main (void)
      19  {
      20    int zero = 0;
      21  
      22    zero += strncmp (ab_d, AB_D, 1);
      23    zero += strncmp (ab_d, AB_D, 2);
      24    zero += strncmp (ab_d, AB_D, 3);
      25    zero += strncmp (ab_d, AB_D, 4);
      26    zero += strncmp (ab_d, AB_D, 5);
      27  
      28    zero += strncmp (ab_d, ABCDEF_H, 1);
      29    zero += strncmp (ab_d, ABCDEF_H, 2);
      30  
      31    zero += strncmp (abcdef_h, AB_D, 2);
      32  
      33    zero += strncmp (abcdef_h, ABCDEF_H, 2);
      34    zero += strncmp (abcdef_h, ABCDEF_H, 3);
      35    zero += strncmp (abcdef_h, ABCDEF_H, 4);
      36    zero += strncmp (abcdef_h, ABCDEF_H, 5);
      37    zero += strncmp (abcdef_h, ABCDEF_H, 6);
      38    zero += strncmp (abcdef_h, ABCDEF_H, 7);
      39    zero += strncmp (abcdef_h, ABCDEF_H, 8);
      40    zero += strncmp (abcdef_h, ABCDEF_H, 9);
      41  
      42    if (zero != 0)
      43      __builtin_abort ();
      44  
      45    int neg = 0;
      46  
      47    neg -= strncmp (ab_d, ABCDEF_H, 3) < 0;
      48    neg -= strncmp (ab_d, ABCDEF_H, 4) < 0;
      49    neg -= strncmp (ab_d, ABCDEF_H, 5) < 0;
      50    neg -= strncmp (ab_d, ABCDEF_H, 6) < 0;
      51    neg -= strncmp (ab_d, ABCDEF_H, 7) < 0;
      52    neg -= strncmp (ab_d, ABCDEF_H, 8) < 0;
      53    neg -= strncmp (ab_d, ABCDEF_H, 9) < 0;
      54  
      55    if (neg != -7)
      56      __builtin_abort ();
      57  }