1  /* Test that -Wtype-limits is enabled by -Wextra */
       2  /* { dg-do compile } */
       3  /* { dg-excess-errors "short=int" { target { avr-*-* } } }  */
       4  /* { dg-options "-Wextra" } */
       5  
       6  void a (unsigned char x)
       7  {
       8    if (x < 0)  return;/* { dg-warning "comparison is always false due to limited range of data type" } */
       9    if (x >= 0) return;/* { dg-warning "comparison is always true due to limited range of data type" } */
      10    if (0 > x)  return;/* { dg-warning "comparison is always false due to limited range of data type" } */
      11    if (0 <= x) return;/* { dg-warning "comparison is always true due to limited range of data type" } */
      12    if (x <= 255) /* { dg-warning "comparison is always true due to limited range of data type" } */
      13      return;
      14    if (255 >= x) /* { dg-warning "comparison is always true due to limited range of data type" } */
      15      return;
      16    if ((int)x <= 255) /* { dg-bogus "comparison is always true due to limited range of data type" "" { xfail *-*-* } } */
      17      return;
      18    if (255 >= (unsigned char) 1)
      19      return;
      20  
      21  }
      22  
      23  void b (unsigned short x)
      24  {                    /* { dg-warning "comparison of unsigned expression in '< 0' is always false" "" { target { ! int32plus } } .+1 } */
      25    if (x < 0)  return;/* { dg-warning "comparison is always false due to limited range of data type" "" { target { int32plus } } } */
      26                       /* { dg-warning "comparison of unsigned expression in '>= 0' is always true" "" { target { ! int32plus } } .+1 } */
      27    if (x >= 0) return;/* { dg-warning "comparison is always true due to limited range of data type" "" { target { int32plus } } } */
      28                       /* { dg-warning "comparison of unsigned expression in '< 0' is always false" "" { target { ! int32plus } } .+1 } */
      29    if (0 > x)  return;/* { dg-warning "comparison is always false due to limited range of data type" "" { target { int32plus } } } */
      30                       /* { dg-warning "comparison of unsigned expression in '>= 0' is always true" "" { target { ! int32plus } } .+1 } */
      31    if (0 <= x) return;/* { dg-warning "comparison is always true due to limited range of data type" "" { target { int32plus } } } */
      32  }
      33  
      34  void c (unsigned int x)
      35  {
      36    if (x < 0)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      37    if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      38    if (0 > x)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      39    if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      40    if (1U >= 0) return;
      41    if (1U < 0) return;
      42    if (0 <= 1U) return;
      43    if (0 > 1U) return;
      44  }
      45  
      46  void d (unsigned long x)
      47  {
      48    if (x < 0)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      49    if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      50    if (0 > x)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      51    if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      52  }
      53  
      54  void e (unsigned long long x)
      55  {
      56    if (x < 0)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      57    if (x >= 0) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      58    if (0 > x)  return;/* { dg-warning "comparison of unsigned expression in '< 0' is always false" } */
      59    if (0 <= x) return;/* { dg-warning "comparison of unsigned expression in '>= 0' is always true" } */
      60  }
      61  
      62  int test (int x) 
      63  {
      64    if ((long long)x <= 0x123456789ABCLL) /* { dg-bogus "comparison is always true due to limited range of data type" "" { xfail *-*-* } } */
      65      return 1;
      66    else 
      67      return 0;
      68  }
      69  
      70