1  /* { dg-do run } */
       2  /* { dg-options "-O2 -fdump-tree-strlen" } */
       3  
       4  #include "strlenopt.h"
       5  
       6  /* Yes, there are people who write code like this.  */
       7  
       8  __attribute__((noinline, noclone)) char *
       9  foo (int r)
      10  {
      11    char buf[10] = "";
      12    strcat (buf, r ? "r" : "w");
      13    strcat (buf, "b");
      14    return strdup (buf);
      15  }
      16  
      17  __attribute__((noinline, noclone)) char *
      18  bar (int r)
      19  {
      20    char buf[10] = {};
      21    strcat (buf, r ? "r" : "w");
      22    strcat (buf, "b");
      23    return strdup (buf);
      24  }
      25  
      26  int
      27  main ()
      28  {
      29    char *q = foo (1);
      30    if (q != NULL)
      31      {
      32        if (strcmp (q, "rb"))
      33  	abort ();
      34        free (q);
      35      }
      36    q = bar (0);
      37    if (q != NULL)
      38      {
      39        if (strcmp (q, "wb"))
      40  	abort ();
      41        free (q);
      42      }
      43    return 0;
      44  }
      45  
      46  /* { dg-final { scan-tree-dump-times "strlen \\(" 0 "strlen1" } } */
      47  /* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen1" } } */
      48  /* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen1" } } */
      49  /* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen1" } } */
      50  /* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen1" } } */