gcc/testsuite/gcc.dg/strlenopt-22.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fdump-tree-strlen" } */
   3
   4 #include "strlenopt.h"
   5
   6 __attribute__((noinline, noclone)) size_t
   7 bar (char *p, char *q)
   8 {
   9   size_t l1, l2, l3;
  10   char *r = strchr (p, '\0');
  11   strcpy (r, "abcde");
  12   char *s = strchr (r, '\0');
  13   strcpy (s, q);
  14   l1 = strlen (p);
  15   l2 = strlen (r);
  16   l3 = strlen (s);
  17   return l1 + l2 + l3;
  18 }
  19
  20 int
  21 main ()
  22 {
  23   char buf[16] = "01234";
  24
  25   if (bar (buf, "56789") != 30)
  26     abort ();
  27
  28   if (memcmp (buf, "01234abcde56789", 16) != 0)
  29     abort ();
  30
  31   return 0;
  32 }
  33
  34 /* { dg-final { scan-tree-dump-times "strlen \\(" 4 "strlen" } } */
  35 /* { dg-final { scan-tree-dump-times "memcpy \\(" 1 "strlen" } } */
  36 /* { dg-final { scan-tree-dump-times "strcpy \\(" 1 "strlen" } } */
  37 /* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen" } } */
  38 /* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen" } } */
  39 /* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen" } } */