gcc/testsuite/gcc.dg/strcmpopt_6.c

/* Verify that strcmp and strncmp calls with mixed constant and
   non-constant strings are evaluated correctly.
   { dg-do run }
   { dg-options "-O2" } */

#include "strlenopt.h"

#define A(expr)                                                 \
  ((expr)                                                       \
   ? (void)0                                                    \
   : (__builtin_printf ("assertion failed on line %i: %s\n",    \
                        __LINE__, #expr),                       \
      __builtin_abort ()))

__attribute__ ((noclone, noinline)) int
test_strlen_gt2_strcmp_abcd (const char *s)
{
  if (strlen (s) < 3)
    return -1;

  return strcmp (s, "abcd") == 0;
}

__attribute__ ((noclone, noinline)) int
test_strlen_lt6_strcmp_abcd (const char *s)
{
  if (strlen (s) > 5)
    return -1;

  return strcmp (s, "abcd") == 0;
}

__attribute__ ((noclone, noinline)) int
test_strcpy_strcmp_abc (const char *s)
{
  char a[5];
  strcpy (a, s);
  return strcmp (a, "abc") == 0;
}

__attribute__ ((noclone, noinline)) int
test_strcpy_abc_strcmp (const char *s)
{
  char a[4], b[6];
  strcpy (a, "abc");
  strcpy (b, s);
  return strcmp (a, b) == 0;
}

/* Exercise strcmp of two strings between 1 and 3 characters long
   stored in arrays of the same known size.  */
char ga4[4], gb4[4];

__attribute__ ((noclone, noinline)) int
test_store_0_nulterm_strcmp_same_size_arrays (void)
{
  ga4[0] = gb4[0] = 'x';
  ga4[3] = gb4[3] = '\0';
  return strcmp (ga4, gb4) == 0;
}

__attribute__ ((noclone, noinline)) int
test_store_0_nulterm_strncmp_bound_2_same_size_arrays (void)
{
  ga4[0] = gb4[0] = 'x';
  ga4[3] = gb4[3] = '\0';
  return strncmp (ga4, gb4, 2) == 0;
}

__attribute__ ((noclone, noinline)) int
test_store_0_nulterm_strncmp_bound_equal_same_size_arrays (void)
{
  ga4[0] = gb4[0] = 'x';
  ga4[3] = gb4[3] = '\0';
  return strncmp (ga4, gb4, 4) == 0;
}

/* Exercise strcmp of two strings between 0 and 3 characters long
   stored in arrays of the same known size.  */

__attribute__ ((noclone, noinline)) int
test_nulterm_strcmp_same_size_arrays (void)
{
  ga4[3] = gb4[3] = '\0';
  return strcmp (ga4, gb4) == 0;
}

/* Exercise strcmp of two strings between 1 and 3 and 1 and 4 characters
   long, respectively, stored in arrays of known but different sizes.  */
char gc5[5];

__attribute__ ((noclone, noinline)) int
test_store_0_nulterm_strcmp_arrays (void)
{
  ga4[0] = gc5[0] = 'x';
  ga4[3] = gc5[4] = '\0';
  return strcmp (ga4, gc5) == 0;
}

/* Exercise strcmp of two strings between 0 and 3 and 1 and 4 characters
   long, respectively, stored in arrays of known but different sizes.  */

__attribute__ ((noclone, noinline)) int
test_nulterm_strcmp_arrays (void)
{
  ga4[3] = gc5[4] = '\0';
  return strcmp (ga4, gc5) == 0;
}


__attribute__ ((noclone, noinline)) int
test_strcpy_strncmp_abcd (const char *s)
{
  char a[6];
  strcpy (a, s);
  return strcmp (a, "abcd") == 0;
}

__attribute__ ((noclone, noinline)) int
test_strcpy_abcd_strncmp_3 (const char *s)
{
  char a[6], b[8];
  strcpy (a, "abcd");
  strcpy (b, s);
  return strncmp (a, b, 3) == 0;
}

__attribute__ ((noclone, noinline)) int
test_strcpy_abcd_strncmp_4 (const char *s)
{
  char a[6], b[8];
  strcpy (a, "abcd");
  strcpy (b, s);
  return strncmp (a, b, 4) == 0;
}


int main (void)
{
  test_strlen_gt2_strcmp_abcd ("abcd");
  test_strlen_lt6_strcmp_abcd ("abcd");

  A (0 == test_strcpy_strcmp_abc ("ab"));
  A (0 != test_strcpy_strcmp_abc ("abc"));
  A (0 == test_strcpy_strcmp_abc ("abcd"));

  A (0 == test_strcpy_abc_strcmp ("ab"));
  A (0 != test_strcpy_abc_strcmp ("abc"));
  A (0 == test_strcpy_abc_strcmp ("abcd"));

  strcpy (ga4, "abc"); strcpy (gb4, "abd");
  A (0 == test_store_0_nulterm_strcmp_same_size_arrays ());
  strcpy (ga4, "abd"); strcpy (gb4, "abc");
  A (0 == test_store_0_nulterm_strcmp_same_size_arrays ());
  strcpy (ga4, "abc"); strcpy (gb4, "abc");
  A (0 != test_store_0_nulterm_strcmp_same_size_arrays ());

  strcpy (ga4, "abc"); strcpy (gb4, "acd");
  A (0 == test_store_0_nulterm_strncmp_bound_2_same_size_arrays ());
  strcpy (ga4, "acd"); strcpy (gb4, "abc");
  A (0 == test_store_0_nulterm_strncmp_bound_2_same_size_arrays ());
  strcpy (ga4, "abc"); strcpy (gb4, "abc");
  A (0 != test_store_0_nulterm_strncmp_bound_2_same_size_arrays ());

  strcpy (ga4, "abc"); strcpy (gb4, "abd");
  A (0 == test_store_0_nulterm_strncmp_bound_equal_same_size_arrays ());
  strcpy (ga4, "abd"); strcpy (gb4, "abc");
  A (0 == test_store_0_nulterm_strncmp_bound_equal_same_size_arrays ());
  strcpy (ga4, "abc"); strcpy (gb4, "abc");
  A (0 != test_store_0_nulterm_strncmp_bound_equal_same_size_arrays ());

  strcpy (ga4, "abc"); strcpy (gb4, "abd");
  A (0 == test_nulterm_strcmp_same_size_arrays ());
  strcpy (ga4, "abd"); strcpy (gb4, "abc");
  A (0 == test_nulterm_strcmp_same_size_arrays ());
  strcpy (ga4, "abc"); strcpy (gb4, "abc");
  A (0 != test_nulterm_strcmp_same_size_arrays ());

  strcpy (ga4, "abc"); strcpy (gc5, "abcd");
  A (0 == test_store_0_nulterm_strcmp_arrays ());
  strcpy (ga4, "abd"); strcpy (gc5, "abcd");
  A (0 == test_store_0_nulterm_strcmp_arrays ());
  strcpy (ga4, "abc"); strcpy (gc5, "abc");
  A (0 != test_store_0_nulterm_strcmp_arrays ());

  strcpy (ga4, "abc"); strcpy (gc5, "abcd");
  A (0 == test_nulterm_strcmp_arrays ());
  strcpy (ga4, "abd"); strcpy (gc5, "abc");
  A (0 == test_nulterm_strcmp_arrays ());
  strcpy (ga4, "abc"); strcpy (gc5, "abc");
  A (0 != test_nulterm_strcmp_arrays ());

  A (0 == test_strcpy_strncmp_abcd ("ab"));
  A (0 == test_strcpy_strncmp_abcd ("abc"));
  A (0 != test_strcpy_strncmp_abcd ("abcd"));
  A (0 == test_strcpy_strncmp_abcd ("abcde"));

  A (0 == test_strcpy_abcd_strncmp_3 ("ab"));
  A (0 != test_strcpy_abcd_strncmp_3 ("abc"));
  A (0 != test_strcpy_abcd_strncmp_3 ("abcd"));
  A (0 != test_strcpy_abcd_strncmp_3 ("abcde"));

  A (0 == test_strcpy_abcd_strncmp_4 ("ab"));
  A (0 == test_strcpy_abcd_strncmp_4 ("abc"));
  A (0 != test_strcpy_abcd_strncmp_4 ("abcd"));
  A (0 != test_strcpy_abcd_strncmp_4 ("abcde"));
}