gcc/testsuite/gcc.dg/strlenopt-33g.c

   1 /* { dg-do run { target *-*-linux* *-*-gnu* } } */
   2 /* { dg-options "-O2 -fdump-tree-strlen" } */
   3
   4 #define USE_GNU
   5 #include "strlenopt.h"
   6
   7 volatile int v;
   8
   9 size_t __attribute__ ((noinline, noclone))
  10 f1 (char *b)
  11 {
  12   char a[30];
  13   v += 1;
  14   // Should be converted to stpcpy.
  15   strcpy (a, b);
  16   int len1 = strlen (a);
  17   a[0] = '_';
  18   a[1] = 0;
  19   return len1 + strlen (a);
  20 }
  21
  22 size_t __attribute__ ((noinline, noclone))
  23 f2 (char *a, char *b)
  24 {
  25   v += 2;
  26   // Should be converted to stpcpy.
  27   strcpy (a, b);
  28   int len1 = strlen (a);
  29   a[0] = '_';
  30   a[1] = 0;
  31   return len1 + strlen (a);
  32 }
  33
  34 int
  35 main ()
  36 {
  37   char a[30];
  38   if (f1 ("foo") != 4 || f2 (a, "foobar") != 7)
  39     abort ();
  40   return 0;
  41 }
  42
  43 /* { dg-final { scan-tree-dump-times "strlen \\(" 0 "strlen" } } */
  44 /* { dg-final { scan-tree-dump-times "stpcpy \\(" 2 "strlen" } } */