1  /* PR c/94040 - ICE on a call to an invalid redeclaration of strftime
       2     { dg-do compile }
       3     { dg-options "-Wall -Wextra" } */
       4  
       5  typedef __SIZE_TYPE__ size_t;
       6  
       7  struct tm;
       8  
       9  size_t strftime (const char *, size_t, char *, struct tm *);
      10  // { dg-warning "-Wbuiltin-declaration-mismatch" "arg 1" { target *-*-* } .-1 }
      11  
      12  // Verify that missing/extra qualifiers are diagnosed with -Wextra.
      13  
      14  int strcmp (char*, const char*);
      15  // { dg-warning "-Wbuiltin-declaration-mismatch" "arg 1" { target *-*-* } .-1 }
      16  
      17  int strncmp (const char*, volatile char*, size_t);
      18  // { dg-warning "-Wbuiltin-declaration-mismatch" "arg 2" { target *-*-* } .-1 }
      19  
      20  size_t strlen (char*);
      21  // { dg-warning "-Wbuiltin-declaration-mismatch" "arg 1" { target *-*-* } .-1 }
      22  
      23  
      24  // Verify that calls to built-ins declared with missing/extra qualifiers
      25  // are still treated as those to built-ins by the front-end.
      26  
      27  int test_builtin_calls_fe (size_t n)
      28  {
      29    int r = 0;
      30    r += strcmp ((char*)0, "");               // { dg-warning "\\\[-Wnonnull]" }
      31    r += strcmp ("", (char*)0);               // { dg-warning "\\\[-Wnonnull]" }
      32  
      33    r += strncmp ((char*)0, "", n);           // { dg-warning "\\\[-Wnonnull]" }
      34    r += strncmp ("", (char*)0, n);           // { dg-warning "\\\[-Wnonnull]" }
      35  
      36    r += strlen ((char*)0);                   // { dg-warning "\\\[-Wnonnull]" }
      37    return r;
      38  }
      39  
      40  
      41  // Ditto but by the middle-end.
      42  
      43  #pragma GCC optimize "2"
      44  
      45  int test_builtin_calls_me (void)
      46  {
      47    char *null1 = 0;
      48    char *null2 = null1;
      49    char *null3 = null2;
      50  
      51    int r = 0;
      52    r += strcmp (null1, "123");               // { dg-warning "\\\[-Wnonnull]" }
      53    r += strncmp ("2345", null2, 4);          // { dg-warning "\\\[-Wnonnull]" }
      54    r += strlen (null3);                      // { dg-warning "\\\[-Wnonnull]" }
      55    return r;
      56  }