gcc/testsuite/gcc.dg/builtin-strstr-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3 /* { dg-final { scan-tree-dump-not "link_error" "optimized" } } */
   4 /* { dg-final { scan-tree-dump-not "__builtin_strstr" "optimized" } } */
   5 /* { dg-final { scan-tree-dump-times "return p_\[0-9]*.D.;" 1 "optimized" } } */
   6 /* { dg-final { scan-tree-dump-times "__builtin_strchr" 1 "optimized" } } */
   7
   8 extern void link_error (void);
   9
  10 void
  11 foo (void)
  12 {
  13   const char *p = "abcdef";
  14   const char *q = "def";
  15   p++;
  16   q++;
  17   if (__builtin_strstr (p, q) != p + 3)
  18     link_error ();
  19 }
  20
  21 char *
  22 bar (const char *p)
  23 {
  24   return __builtin_strstr (p, "");
  25 }
  26
  27 char *
  28 baz (const char *p)
  29 {
  30   return __builtin_strstr (p, "d");
  31 }