text: // RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-overlap-compare %s
  
  #define mydefine 2
  
  void f(int x) {
    int y = 0;
  
    // > || <
    if (x > 2 || x < 1) { }
    if (x > 2 || x < 2) { }
    if (x != 2 || x != 3) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x > 2 || x < 3) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x > 0 || x < 0) { }
  
    if (x > 2 || x <= 1) { }
    if (x > 2 || x <= 2) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x > 2 || x <= 3) { } // expected-warning {{overlapping comparisons always evaluate to true}}
  
    if (x >= 2 || x < 1) { }
    if (x >= 2 || x < 2) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x >= 2 || x < 3) { } // expected-warning {{overlapping comparisons always evaluate to true}}
  
    if (x >= 2 || x <= 1) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x >= 2 || x <= 2) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x >= 2 || x <= 3) { } // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x >= 0 || x <= 0) { } // expected-warning {{overlapping comparisons always evaluate to true}}
  
    // > && <
    if (x > 2 && x < 1) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x > 2 && x < 2) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x > 2 && x < 3) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x > 0 && x < 1) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
  
    if (x > 2 && x <= 1) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x > 2 && x <= 2) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x > 2 && x <= 3) { }
  
    if (x >= 2 && x < 1) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x >= 2 && x < 2) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x >= 2 && x < 3) { }
    if (x >= 0 && x < 0) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
  
    if (x >= 2 && x <= 1) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x >= 2 && x <= 2) { }
    if (x >= 2 && x <= 3) { }
  
    // !=, ==, ..
    if (x != 2 || x != 3) { }  // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x != 2 || x < 3) { }   // expected-warning {{overlapping comparisons always evaluate to true}}
    if (x == 2 && x == 3) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x == 2 && x > 3) { }   // expected-warning {{overlapping comparisons always evaluate to false}}
    if (x == 3 && x < 0) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
    if (3 == x && x < 0) { }  // expected-warning {{overlapping comparisons always evaluate to false}}
  
    if (x == mydefine && x > 3) { }
    if (x == (mydefine + 1) && x > 3) { }
  }
  
  // Don't generate a warning here.
  void array_out_of_bounds() {
    int x;
    int buffer[4];
    x = (-7 > 0) ? (buffer[-7]) : 0;
  }
  