forked from OSchip/llvm-project
88 lines
3.5 KiB
C
88 lines
3.5 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-bitwise-compare %s
|
|
// RUN: %clang_cc1 -fsyntax-only -verify -Wall -Wno-unused %s
|
|
|
|
#define mydefine 2
|
|
#define mydefine2 -2
|
|
|
|
enum {
|
|
ZERO,
|
|
ONE,
|
|
};
|
|
|
|
void f(int x) {
|
|
if ((8 & x) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((x & 8) == 4) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((-8 & x) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((x & -8) == 4) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
|
|
if ((x & 8) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
if ((2 & x) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
if ((x & -8) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
if ((-2 & x) != 3) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
|
|
if ((x | 4) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((x | 3) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
if ((5 | x) != 3) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
|
|
if ((x | -4) == 3) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((x | -3) != 4) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
if ((-5 | x) != 3) {} // expected-warning {{bitwise comparison always evaluates to true}}
|
|
|
|
|
|
if ((x & 0x15) == 0x13) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((x & 0xFFEB) == 0x13) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
|
|
if ((0x23 | x) == 0x155){} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if ((0xFFDD | x) == 0x155){} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
|
|
if (!!((8 & x) == 3)) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
if (!!((-8 & x) == 3)) {} // expected-warning {{bitwise comparison always evaluates to false}}
|
|
|
|
int y = ((8 & x) == 3) ? 1 : 2; // expected-warning {{bitwise comparison always evaluates to false}}
|
|
y = ((-8 & x) == 3) ? 1 : 2; // expected-warning {{bitwise comparison always evaluates to false}}
|
|
y = ((3 | x) != 5) ? 1 : 2; // expected-warning {{bitwise comparison always evaluates to true}}
|
|
y = ((-3 | x) != 5) ? 1 : 2; // expected-warning {{bitwise comparison always evaluates to true}}
|
|
|
|
if ((x & 8) == 8) {}
|
|
if ((x & 8) != 8) {}
|
|
if ((x | 4) == 4) {}
|
|
if ((x | 4) != 4) {}
|
|
|
|
if ((-2 & x) != 4) {}
|
|
if ((x & -8) == -8) {}
|
|
if ((x & -8) != -8) {}
|
|
if ((x | -4) == -4) {}
|
|
if ((x | -4) != -4) {}
|
|
|
|
|
|
if ((x & 9) == 8) {}
|
|
if ((x & 9) != 8) {}
|
|
if ((x | 4) == 5) {}
|
|
if ((x | 4) != 5) {}
|
|
|
|
if ((x & -9) == -10) {}
|
|
if ((x & -9) != -10) {}
|
|
if ((x | -4) == -3) {}
|
|
if ((x | -4) != -3) {}
|
|
|
|
if ((x^0) == 0) {}
|
|
|
|
if ((x & mydefine) == 8) {}
|
|
if ((x | mydefine) == 4) {}
|
|
|
|
if ((x & mydefine2) == 8) {}
|
|
if ((x | mydefine2) == 4) {}
|
|
|
|
}
|
|
|
|
void g(int x) {
|
|
if (x | 5) {} // expected-warning {{bitwise or with non-zero value always evaluates to true}}
|
|
if (5 | x) {} // expected-warning {{bitwise or with non-zero value always evaluates to true}}
|
|
if (!((x | 5))) {} // expected-warning {{bitwise or with non-zero value always evaluates to true}}
|
|
|
|
if (x | -1) {} // expected-warning {{bitwise or with non-zero value always evaluates to true}}
|
|
if (x | ONE) {} // expected-warning {{bitwise or with non-zero value always evaluates to true}}
|
|
|
|
if (x | ZERO) {}
|
|
}
|