gcc/testsuite/gcc.dg/strlenopt-12.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3
   4 #include "strlenopt.h"
   5
   6 __attribute__((noinline, noclone)) char *
   7 fn1 (char *p, size_t *l)
   8 {
   9   char *q = strcat (p, "abcde");
  10   *l = strlen (p);
  11   return q;
  12 }
  13
  14 __attribute__((noinline, noclone)) char *
  15 fn2 (char *p, const char *q, size_t *l1, size_t *l2)
  16 {
  17   size_t l = strlen (q);
  18   char *r = strcat (p, q);
  19   *l1 = l;
  20   *l2 = strlen (p);
  21   return r;
  22 }
  23
  24 __attribute__((noinline, noclone)) char *
  25 fn3 (char *p, const char *q, size_t *l)
  26 {
  27   char *r = strcpy (p, q);
  28   *l = strlen (p);
  29   return r;
  30 }
  31
  32 __attribute__((noinline, noclone)) char *
  33 fn4 (char *p, const char *q, size_t *l)
  34 {
  35   char *r = strcat (p, q);
  36   *l = strlen (p);
  37   return r;
  38 }
  39
  40 __attribute__((noinline, noclone)) char *
  41 fn5 (char *p, const char *q, size_t *l1, size_t *l2, size_t *l3)
  42 {
  43   size_t l = strlen (q);
  44   size_t ll = strlen (p);
  45   char *r = strcat (p, q);
  46   *l1 = l;
  47   *l2 = strlen (p);
  48   *l3 = ll;
  49   return r;
  50 }
  51
  52 __attribute__((noinline, noclone)) char *
  53 fn6 (char *p, const char *q, size_t *l1, size_t *l2)
  54 {
  55   size_t l = strlen (p);
  56   char *r = strcat (p, q);
  57   *l1 = strlen (p);
  58   *l2 = l;
  59   return r;
  60 }
  61
  62 int
  63 main ()
  64 {
  65   char buf[64];
  66   const char *volatile q = "fgh";
  67   size_t l, l1, l2, l3;
  68   memset (buf, '\0', sizeof buf);
  69   memset (buf, 'a', 3);
  70   if (fn1 (buf, &l) != buf || l != 8 || memcmp (buf, "aaaabcde", 9) != 0)
  71     abort ();
  72   if (fn2 (buf, q, &l1, &l2) != buf || l1 != 3 || l2 != 11
  73       || memcmp (buf, "aaaabcdefgh", 12) != 0)
  74     abort ();
  75   if (fn3 (buf, q, &l) != buf || l != 3
  76       || memcmp (buf, "fgh\0bcdefgh", 12) != 0)
  77     abort ();
  78   if (fn4 (buf, q, &l) != buf || l != 6
  79       || memcmp (buf, "fghfgh\0efgh", 12) != 0)
  80     abort ();
  81   l1 = 0;
  82   l2 = 0;
  83   if (fn5 (buf, q, &l1, &l2, &l3) != buf || l1 != 3 || l2 != 9 || l3 != 6
  84       || memcmp (buf, "fghfghfgh\0h", 12) != 0)
  85     abort ();
  86   if (fn6 (buf, q, &l1, &l2) != buf || l1 != 12 || l2 != 9
  87       || memcmp (buf, "fghfghfghfgh", 13) != 0)
  88     abort ();
  89   return 0;
  90 }