163 lines · c
1// RUN: %clang_cc1 -fsyntax-only -verify %s -Wno-logical-not-parentheses2 3 4void f(int x, int y, int z) {5 int a,b;6 7 8 if ((a > 2) > 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}9 10 if (a > b) {} // no warning11 if (a < b) {} // no warning12 if (a >= b) {} // no warning13 if (a <= b) {} // no warning14 if (a == b) {} // no warning15 if (a != b) {} // no warning16 17 if (a > 0) {} // no warning18 if (a > 1) {} // no warning19 if (a > 2) {} // no warning20 21 if (a >= 0) {} // no warning22 if (a >= 1) {} // no warning23 if (a >= 2) {} // no warning24 if (a >= -1) {} // no warning25 26 if (a <= 0) {} // no warning27 if (a <= 1) {} // no warning28 if (a <= 2) {} // no warning29 if (a <= -1) {} // no warning30 31 32 if (!a > 0) {} // no warning33 if (!a > 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}34 if (!a > 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}35 if (!a > y) {} // no warning36 if (!a > b) {} // no warning37 if (!a > -1) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}38 39 if (!a < 0) {} // expected-warning {{comparison of constant 0 with boolean expression is always false}}40 if (!a < 1) {} // no warning41 if (!a < 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}42 if (!a < y) {} // no warning43 if (!a < b) {} // no warning44 if (!a < -1) {} // expected-warning {{comparison of constant -1 with boolean expression is always false}}45 46 if (!a >= 0) {} // expected-warning {{comparison of constant 0 with boolean expression is always true}}47 if (!a >= 1) {} // no warning48 if (!a >= 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}49 if (!a >= y) {} // no warning50 if (!a >= b) {} // no warning51 if (!a >= -1) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}52 53 if (!a <= 0) {} // no warning54 if (!a <= 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always true}}55 if (!a <= 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}56 if (!a <= y) {} // no warning57 if (!a <= b) {} // no warning58 if (!a <= -1) {} // expected-warning {{comparison of constant -1 with boolean expression is always false}}59 60 if ((a||b) > 0) {} // no warning61 if ((a||b) > 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}62 if ((a||b) > 4) {} // expected-warning {{comparison of constant 4 with boolean expression is always false}}63 if ((a||b) > -1) {}// expected-warning {{comparison of constant -1 with boolean expression is always true}}64 65 if ((a&&b) > 0) {} // no warning66 if ((a&&b) > 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}67 if ((a&&b) > 4) {} // expected-warning {{comparison of constant 4 with boolean expression is always false}}68 69 if ((a<y) > 0) {} // no warning70 if ((a<y) > 1) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}71 if ((a<y) > 4) {} // expected-warning {{comparison of constant 4 with boolean expression is always false}}72 if ((a<y) > z) {} // no warning73 if ((a<y) > -1) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}74 75 if ((a<y) == 0) {} // no warning76 if ((a<y) == 1) {} // no warning77 if ((a<y) == 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}78 if ((a<y) == z) {} // no warning79 if ((a<y) == -1) {}// expected-warning {{comparison of constant -1 with boolean expression is always false}}80 81 if ((a<y) != 0) {} // no warning82 if ((a<y) != 1) {} // no warning83 if ((a<y) != 2) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}84 if ((a<y) != z) {} // no warning85 if ((a<y) != -1) {}// expected-warning {{comparison of constant -1 with boolean expression is always true}}86 87 if ((a<y) == z) {} // no warning88 if (a>y<z) {} // expected-error {{chained comparison 'X > Y < Z' does not behave the same as a mathematical expression}}89 if ((a<y) > z) {} // no warning90 if((a<y)>(z<y)) {} // no warning91 if((a<y)==(z<y)){} // no warning92 if((a<y)!=(z<y)){} // no warning93 if((z==x)<(y==z)){}// no warning94 if((a<y)!=((z==x)<(y==z))){} //no warning95 96 97 if (0 > !a) {} // expected-warning {{comparison of constant 0 with boolean expression is always false}}98 if (1 > !a) {} // no warning99 if (2 > !a) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}100 if (y > !a) {} // no warning101 if (-1 > !a) {} // expected-warning {{comparison of constant -1 with boolean expression is always false}}102 103 if (0 < !a) {} // no warning104 if (1 < !a) {} // expected-warning {{comparison of constant 1 with boolean expression is always false}}105 if (2 < !a) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}106 if (y < !a) {} // no warning107 if (-1 < !a) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}108 109 if (0 >= !a) {} // no warning110 if (1 >= !a) {} // expected-warning {{comparison of constant 1 with boolean expression is always true}}111 if (2 >= !a) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}112 if (y >= !a) {} // no warning113 if (-1 >= !a) {} // expected-warning {{comparison of constant -1 with boolean expression is always false}}114 115 if (0 <= !a) {} // expected-warning {{comparison of constant 0 with boolean expression is always true}}116 if (1 <= !a) {} // no warning117 if (2 <= !a) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}118 if (y <= !a) {} // no warning119 if (-1 <= !a) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}120 121 if (0 > (a||b)) {} // expected-warning {{comparison of constant 0 with boolean expression is always false}}122 if (1 > (a||b)) {} // no warning123 if (4 > (a||b)) {} // expected-warning {{comparison of constant 4 with boolean expression is always true}}124 125 if (0 > (a&&b)) {} // expected-warning {{comparison of constant 0 with boolean expression is always false}}126 if (1 > (a&&b)) {} // no warning127 if (4 > (a&&b)) {} // expected-warning {{comparison of constant 4 with boolean expression is always true}}128 129 if (0 > (a<y)) {} // expected-warning {{comparison of constant 0 with boolean expression is always false}}130 if (1 > (a<y)) {} // no warning131 if (4 > (a<y)) {} // expected-warning {{comparison of constant 4 with boolean expression is always true}}132 if (z > (a<y)) {} // no warning133 if (-1 > (a<y)) {} // expected-warning {{comparison of constant -1 with boolean expression is always false}}134 135 if (0 == (a<y)) {} // no warning136 if (1 == (a<y)) {} // no warning137 if (2 == (a<y)) {} // expected-warning {{comparison of constant 2 with boolean expression is always false}}138 if (z == (a<y)) {} // no warning139 if (-1 == (a<y)){} // expected-warning {{comparison of constant -1 with boolean expression is always false}}140 141 if (0 !=(a<y)) {} // no warning142 if (1 !=(a<y)) {} // no warning143 if (2 !=(a<y)) {} // expected-warning {{comparison of constant 2 with boolean expression is always true}}144 if (z !=(a<y)) {} // no warning145 if (-1 !=(a<y)) {} // expected-warning {{comparison of constant -1 with boolean expression is always true}}146 147 if (z ==(a<y)) {} // no warning148 if (z<a>y) {} // expected-error {{chained comparison 'X < Y > Z' does not behave the same as a mathematical expression}}149 if (z > (a<y)) {} // no warning150 if((z<y)>(a<y)) {} // no warning151 if((z<y)==(a<y)){} // no warning152 if((z<y)!=(a<y)){} // no warning153 if((y==z)<(z==x)){} // no warning154 if(((z==x)<(y==z))!=(a<y)){} // no warning155 156 if(((z==x)<(-1==z))!=(a<y)){} // no warning157 if(((z==x)<(z==-1))!=(a<y)){} // no warning158 if(((z==x)<-1)!=(a<y)){} // expected-warning {{comparison of constant -1 with boolean expression is always false}}159 if(((z==x)< 2)!=(a<y)){} // expected-warning {{comparison of constant 2 with boolean expression is always true}}160 if(((z==x)<(z>2))!=(a<y)){} // no warning161 162}163