gcc/testsuite/gcc.dg/strlenopt-27.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 fn1 (char *p)
   8 {
   9   strcpy (p, "foobar");
  10   return strlen (p + 2); // This strlen should be optimized into 4.
  11 }
  12
  13 int
  14 main (void)
  15 {
  16   char p[] = "barfoo";
  17   if (fn1 (p) != 4)
  18     abort ();
  19   return 0;
  20 }
  21
  22 /* { dg-final { scan-tree-dump-times "strlen \\(" 0 "strlen" } } */