forked from OSchip/llvm-project
65 lines
3.2 KiB
C
65 lines
3.2 KiB
C
// 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;
|
|
}
|