gcc/testsuite/gcc.dg/strcmpopt_5.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fdump-rtl-expand" } */
   3
   4 typedef struct { char s[8]; int x; } S;
   5 __attribute__ ((noinline)) int
   6 f1 (S * s)
   7 {
   8   int result = 0;
   9   result += __builtin_strncmp (s->s, "ab", 2);
  10   result += __builtin_strncmp (s->s, "abc", 3);
  11   return result;
  12 }
  13
  14 __attribute__ ((noinline)) int
  15 f2 (char *p)
  16 {
  17   int result = 0;
  18   result += __builtin_strncmp (p, "ab", 2);
  19   result += __builtin_strncmp (p, "abc", 3);
  20   return result;
  21 }
  22
  23 __attribute__ ((noinline)) int
  24 f3 (S * s)
  25 {
  26   int result = 0;
  27   result += __builtin_strcmp (s->s, "a");
  28   result += __builtin_strcmp (s->s, "ab");
  29   return result;
  30 }
  31
  32 __attribute__ ((noinline)) int
  33 f4 (char *p)
  34 {
  35   int result = 0;
  36   result += __builtin_strcmp (p, "a");
  37   result += __builtin_strcmp (p, "ab");
  38   return result;
  39 }
  40
  41 __attribute__ ((noinline)) int
  42 f5 (S * s)
  43 {
  44   int result = 0;
  45   result += __builtin_memcmp (s->s, "ab", 2);
  46   result += __builtin_memcmp (s->s, "abc", 3);
  47   return result;
  48 }
  49
  50 __attribute__ ((noinline)) int
  51 f6 (char *p)
  52 {
  53   int result = 0;
  54   result += __builtin_memcmp (p, "ab", 2);
  55   result += __builtin_memcmp (p, "abc", 3);
  56   return result;
  57 }
  58
  59 int main (void)
  60 {
  61   S ss = {{'a','b','c'}, 2};
  62   char *s = "abcd";
  63
  64   if (f1 (&ss) != 0 || f2 (s) != 0)
  65     __builtin_abort ();
  66
  67   if (f3 (&ss) <= 0 || f4 (s) <= 0)
  68     __builtin_abort ();
  69
  70   if (f5 (&ss) != 0 || f6 (s) != 0)
  71     __builtin_abort ();
  72
  73   return 0;
  74
  75 }
  76
  77
  78 /* { dg-final { scan-rtl-dump-times "__builtin_strcmp" 0 "expand" } } */
  79 /* { dg-final { scan-rtl-dump-times "__builtin_strncmp" 0 "expand" } } */
  80 /* { dg-final { scan-rtl-dump-times "__builtin_memcmp" 0 "expand" } } */