// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core.IdenticalExpr -w -verify %s
/* Only one expected warning per function allowed at the very end. */
int func(void)
{
return 0;
}
int func2(void)
{
return 0;
}
int funcParam(int a)
{
return 0;
}
/* '!=' operator*/
/* '!=' with float */
int checkNotEqualFloatLiteralCompare1(void) {
return (5.14F != 5.14F); // no warning
}
int checkNotEqualFloatLiteralCompare2(void) {
return (6.14F != 7.14F); // no warning
}
int checkNotEqualFloatDeclCompare1(void) {
float f = 7.1F;
float g = 7.1F;
return (f != g); // no warning
}
int checkNotEqualFloatDeclCompare12(void) {
float f = 7.1F;
return (f != f); // no warning
}
int checkNotEqualFloatDeclCompare3(void) {
float f = 7.1F;
return (f != 7.1F); // no warning
}
int checkNotEqualFloatDeclCompare4(void) {
float f = 7.1F;
return (7.1F != f); // no warning
}
int checkNotEqualFloatDeclCompare5(void) {
float f = 7.1F;
int t = 7;
return (t != f); // no warning
}
int checkNotEqualFloatDeclCompare6(void) {
float f = 7.1F;
int t = 7;
return (f != t); // no warning
}
int checkNotEqualCastFloatDeclCompare11(void) {
float f = 7.1F;
return ((int)f != (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkNotEqualCastFloatDeclCompare12(void) {
float f = 7.1F;
return ((char)f != (int)f); // no warning
}
int checkNotEqualBinaryOpFloatCompare1(void) {
int res;
float f= 3.14F;
res = (f + 3.14F != f + 3.14F); // no warning
return (0);
}
int checkNotEqualBinaryOpFloatCompare2(void) {
float f = 7.1F;
float g = 7.1F;
return (f + 3.14F != g + 3.14F); // no warning
}
int checkNotEqualBinaryOpFloatCompare3(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F != (int)f + 3.14F); // no warning
return (0);
}
int checkNotEqualBinaryOpFloatCompare4(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F != (char)f + 3.14F); // no warning
return (0);
}
int checkNotEqualNestedBinaryOpFloatCompare1(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (3.14F - u)*t) != ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkNotEqualNestedBinaryOpFloatCompare2(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) != ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkNotEqualNestedBinaryOpFloatCompare3(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) != ((int)f + (3.14F - u)*(f + t != f + t))); // no warning
return (0);
}
/* end '!=' with float*/
/* '!=' with int*/
int checkNotEqualIntLiteralCompare1(void) {
return (5 != 5); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkNotEqualIntLiteralCompare2(void) {
return (6 != 7); // no warning
}
int checkNotEqualIntDeclCompare1(void) {
int f = 7;
int g = 7;
return (f != g); // no warning
}
int checkNotEqualIntDeclCompare3(void) {
int f = 7;
return (f != 7); // no warning
}
int checkNotEqualIntDeclCompare4(void) {
int f = 7;
return (7 != f); // no warning
}
int checkNotEqualCastIntDeclCompare11(void) {
int f = 7;
return ((int)f != (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkNotEqualCastIntDeclCompare12(void) {
int f = 7;
return ((char)f != (int)f); // no warning
}
int checkNotEqualBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = (f + 4 != f + 4); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualBinaryOpIntCompare2(void) {
int f = 7;
int g = 7;
return (f + 4 != g + 4); // no warning
}
int checkNotEqualBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = ((int)f + 4 != (int)f + 4); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualBinaryOpIntCompare4(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = ((int)f + 4 != (char)f + 4); // no warning
return (0);
}
int checkNotEqualBinaryOpIntCompare5(void) {
int res;
int t= 1;
int u= 2;
res = (u + t != u + t); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualNestedBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (3 - u)*t) != ((int)f + (3 - u)*t)); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualNestedBinaryOpIntCompare2(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) != ((int)f + (3 - u)*t)); // no warning
return (0);
}
int checkNotEqualNestedBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) != ((int)f + (3 - u)*(t + 1 != t + 1))); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
/* end '!=' int */
/* '!=' with int pointer */
int checkNotEqualIntPointerLiteralCompare1(void) {
int* p = 0;
return (p != 0); // no warning
}
int checkNotEqualIntPointerLiteralCompare2(void) {
return (6 != 7); // no warning
}
int checkNotEqualIntPointerDeclCompare1(void) {
int k = 3;
int* f = &k;
int* g = &k;
return (f != g); // no warning
}
int checkNotEqualCastIntPointerDeclCompare11(void) {
int k = 7;
int* f = &k;
return ((int*)f != (int*)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkNotEqualCastIntPointerDeclCompare12(void) {
int k = 7;
int* f = &k;
return ((int*)((char*)f) != (int*)f); // no warning
}
int checkNotEqualBinaryOpIntPointerCompare1(void) {
int k = 7;
int res;
int* f= &k;
res = (f + 4 != f + 4); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualBinaryOpIntPointerCompare2(void) {
int k = 7;
int* f = &k;
int* g = &k;
return (f + 4 != g + 4); // no warning
}
int checkNotEqualBinaryOpIntPointerCompare3(void) {
int k = 7;
int res;
int* f= &k;
res = ((int*)f + 4 != (int*)f + 4); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualBinaryOpIntPointerCompare4(void) {
int k = 7;
int res;
int* f= &k;
res = ((int*)f + 4 != (int*)((char*)f) + 4); // no warning
return (0);
}
int checkNotEqualNestedBinaryOpIntPointerCompare1(void) {
int res;
int k = 7;
int t= 1;
int* u= &k+2;
int* f= &k+3;
res = ((f + (3)*t) != (f + (3)*t)); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkNotEqualNestedBinaryOpIntPointerCompare2(void) {
int res;
int k = 7;
int t= 1;
int* u= &k+2;
int* f= &k+3;
res = (((3)*t + f) != (f + (3)*t)); // no warning
return (0);
}
/* end '!=' int* */
/* '!=' with function*/
int checkNotEqualSameFunction() {
unsigned a = 0;
unsigned b = 1;
int res = (a+func() != a+func()); // no warning
return (0);
}
int checkNotEqualDifferentFunction() {
unsigned a = 0;
unsigned b = 1;
int res = (a+func() != a+func2()); // no warning
return (0);
}
int checkNotEqualSameFunctionSameParam() {
unsigned a = 0;
unsigned b = 1;
int res = (a+funcParam(a) != a+funcParam(a)); // no warning
return (0);
}
int checkNotEqualSameFunctionDifferentParam() {
unsigned a = 0;
unsigned b = 1;
int res = (a+funcParam(a) != a+funcParam(b)); // no warning
return (0);
}
/* end '!=' with function*/
/* end '!=' */
/* EQ operator */
int checkEqualIntPointerDeclCompare(void) {
int k = 3;
int* f = &k;
int* g = &k;
return (f == g); // no warning
}
int checkEqualIntPointerDeclCompare0(void) {
int k = 3;
int* f = &k;
return (f+1 == f+1); // expected-warning {{comparison of identical expressions always evaluates to true}}
}
/* EQ with float*/
int checkEqualFloatLiteralCompare1(void) {
return (5.14F == 5.14F); // no warning
}
int checkEqualFloatLiteralCompare2(void) {
return (6.14F == 7.14F); // no warning
}
int checkEqualFloatDeclCompare1(void) {
float f = 7.1F;
float g = 7.1F;
return (f == g); // no warning
}
int checkEqualFloatDeclCompare12(void) {
float f = 7.1F;
return (f == f); // no warning
}
int checkEqualFloatDeclCompare3(void) {
float f = 7.1F;
return (f == 7.1F); // no warning
}
int checkEqualFloatDeclCompare4(void) {
float f = 7.1F;
return (7.1F == f); // no warning
}
int checkEqualFloatDeclCompare5(void) {
float f = 7.1F;
int t = 7;
return (t == f); // no warning
}
int checkEqualFloatDeclCompare6(void) {
float f = 7.1F;
int t = 7;
return (f == t); // no warning
}
int checkEqualCastFloatDeclCompare11(void) {
float f = 7.1F;
return ((int)f == (int)f); // expected-warning {{comparison of identical expressions always evaluates to true}}
}
int checkEqualCastFloatDeclCompare12(void) {
float f = 7.1F;
return ((char)f == (int)f); // no warning
}
int checkEqualBinaryOpFloatCompare1(void) {
int res;
float f= 3.14F;
res = (f + 3.14F == f + 3.14F); // no warning
return (0);
}
int checkEqualBinaryOpFloatCompare2(void) {
float f = 7.1F;
float g = 7.1F;
return (f + 3.14F == g + 3.14F); // no warning
}
int checkEqualBinaryOpFloatCompare3(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F == (int)f + 3.14F); // no warning
return (0);
}
int checkEqualBinaryOpFloatCompare4(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F == (char)f + 3.14F); // no warning
return (0);
}
int checkEqualNestedBinaryOpFloatCompare1(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (3.14F - u)*t) == ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkEqualNestedBinaryOpFloatCompare2(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) == ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkEqualNestedBinaryOpFloatCompare3(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) == ((int)f + (3.14F - u)*(f + t == f + t))); // no warning
return (0);
}
/* Equal with int*/
int checkEqualIntLiteralCompare1(void) {
return (5 == 5); // expected-warning {{comparison of identical expressions always evaluates to true}}
}
int checkEqualIntLiteralCompare2(void) {
return (6 == 7); // no warning
}
int checkEqualIntDeclCompare1(void) {
int f = 7;
int g = 7;
return (f == g); // no warning
}
int checkEqualCastIntDeclCompare11(void) {
int f = 7;
return ((int)f == (int)f); // expected-warning {{comparison of identical expressions always evaluates to true}}
}
int checkEqualCastIntDeclCompare12(void) {
int f = 7;
return ((char)f == (int)f); // no warning
}
int checkEqualIntDeclCompare3(void) {
int f = 7;
return (f == 7); // no warning
}
int checkEqualIntDeclCompare4(void) {
int f = 7;
return (7 == f); // no warning
}
int checkEqualBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = (f + 4 == f + 4); // expected-warning {{comparison of identical expressions always evaluates to true}}
return (0);
}
int checkEqualBinaryOpIntCompare2(void) {
int f = 7;
int g = 7;
return (f + 4 == g + 4); // no warning
}
int checkEqualBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = ((int)f + 4 == (int)f + 4); // expected-warning {{comparison of identical expressions always evaluates to true}}
return (0);
}
int checkEqualBinaryOpIntCompare4(void) {
int res;
int t= 1;
int u= 2;
int f= 4;
res = ((int)f + 4 == (char)f + 4); // no warning
return (0);
}
int checkEqualBinaryOpIntCompare5(void) {
int res;
int t= 1;
int u= 2;
res = (u + t == u + t); // expected-warning {{comparison of identical expressions always evaluates to true}}
return (0);
}
int checkEqualNestedBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (3 - u)*t) == ((int)f + (3 - u)*t)); // expected-warning {{comparison of identical expressions always evaluates to true}}
return (0);
}
int checkEqualNestedBinaryOpIntCompare2(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) == ((int)f + (3 - u)*t)); // no warning
return (0);
}
int checkEqualNestedBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) == ((int)f + (3 - u)*(t + 1 == t + 1))); // expected-warning {{comparison of identical expressions always evaluates to true}}
return (0);
}
/* '==' with function*/
int checkEqualSameFunction() {
unsigned a = 0;
unsigned b = 1;
int res = (a+func() == a+func()); // no warning
return (0);
}
int checkEqualDifferentFunction() {
unsigned a = 0;
unsigned b = 1;
int res = (a+func() == a+func2()); // no warning
return (0);
}
int checkEqualSameFunctionSameParam() {
unsigned a = 0;
unsigned b = 1;
int res = (a+funcParam(a) == a+funcParam(a)); // no warning
return (0);
}
int checkEqualSameFunctionDifferentParam() {
unsigned a = 0;
unsigned b = 1;
int res = (a+funcParam(a) == a+funcParam(b)); // no warning
return (0);
}
/* end '==' with function*/
/* end EQ int */
/* end EQ */
/* LT */
/* LT with float */
int checkLessThanFloatLiteralCompare1(void) {
return (5.14F < 5.14F); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkLessThanFloatLiteralCompare2(void) {
return (6.14F < 7.14F); // no warning
}
int checkLessThanFloatDeclCompare1(void) {
float f = 7.1F;
float g = 7.1F;
return (f < g); // no warning
}
int checkLessThanFloatDeclCompare12(void) {
float f = 7.1F;
return (f < f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkLessThanFloatDeclCompare3(void) {
float f = 7.1F;
return (f < 7.1F); // no warning
}
int checkLessThanFloatDeclCompare4(void) {
float f = 7.1F;
return (7.1F < f); // no warning
}
int checkLessThanFloatDeclCompare5(void) {
float f = 7.1F;
int t = 7;
return (t < f); // no warning
}
int checkLessThanFloatDeclCompare6(void) {
float f = 7.1F;
int t = 7;
return (f < t); // no warning
}
int checkLessThanCastFloatDeclCompare11(void) {
float f = 7.1F;
return ((int)f < (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkLessThanCastFloatDeclCompare12(void) {
float f = 7.1F;
return ((char)f < (int)f); // no warning
}
int checkLessThanBinaryOpFloatCompare1(void) {
int res;
float f= 3.14F;
res = (f + 3.14F < f + 3.14F); // no warning
return (0);
}
int checkLessThanBinaryOpFloatCompare2(void) {
float f = 7.1F;
float g = 7.1F;
return (f + 3.14F < g + 3.14F); // no warning
}
int checkLessThanBinaryOpFloatCompare3(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F < (int)f + 3.14F); // no warning
return (0);
}
int checkLessThanBinaryOpFloatCompare4(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F < (char)f + 3.14F); // no warning
return (0);
}
int checkLessThanNestedBinaryOpFloatCompare1(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (3.14F - u)*t) < ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkLessThanNestedBinaryOpFloatCompare2(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) < ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkLessThanNestedBinaryOpFloatCompare3(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) < ((int)f + (3.14F - u)*(f + t < f + t))); // no warning
return (0);
}
/* end LT with float */
/* LT with int */
int checkLessThanIntLiteralCompare1(void) {
return (5 < 5); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkLessThanIntLiteralCompare2(void) {
return (6 < 7); // no warning
}
int checkLessThanIntDeclCompare1(void) {
int f = 7;
int g = 7;
return (f < g); // no warning
}
int checkLessThanIntDeclCompare3(void) {
int f = 7;
return (f < 7); // no warning
}
int checkLessThanIntDeclCompare4(void) {
int f = 7;
return (7 < f); // no warning
}
int checkLessThanIntDeclCompare5(void) {
int f = 7;
int t = 7;
return (t < f); // no warning
}
int checkLessThanIntDeclCompare6(void) {
int f = 7;
int t = 7;
return (f < t); // no warning
}
int checkLessThanCastIntDeclCompare11(void) {
int f = 7;
return ((int)f < (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkLessThanCastIntDeclCompare12(void) {
int f = 7;
return ((char)f < (int)f); // no warning
}
int checkLessThanBinaryOpIntCompare1(void) {
int res;
int f= 3;
res = (f + 3 < f + 3); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkLessThanBinaryOpIntCompare2(void) {
int f = 7;
int g = 7;
return (f + 3 < g + 3); // no warning
}
int checkLessThanBinaryOpIntCompare3(void) {
int res;
int f= 3;
res = ((int)f + 3 < (int)f + 3); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkLessThanBinaryOpIntCompare4(void) {
int res;
int f= 3;
res = ((int)f + 3 < (char)f + 3); // no warning
return (0);
}
int checkLessThanNestedBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (3 - u)*t) < ((int)f + (3 - u)*t)); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkLessThanNestedBinaryOpIntCompare2(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) < ((int)f + (3 - u)*t)); // no warning
return (0);
}
int checkLessThanNestedBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) < ((int)f + (3 - u)*(t + u < t + u))); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
/* end LT with int */
/* end LT */
/* GT */
/* GT with float */
int checkGreaterThanFloatLiteralCompare1(void) {
return (5.14F > 5.14F); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkGreaterThanFloatLiteralCompare2(void) {
return (6.14F > 7.14F); // no warning
}
int checkGreaterThanFloatDeclCompare1(void) {
float f = 7.1F;
float g = 7.1F;
return (f > g); // no warning
}
int checkGreaterThanFloatDeclCompare12(void) {
float f = 7.1F;
return (f > f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkGreaterThanFloatDeclCompare3(void) {
float f = 7.1F;
return (f > 7.1F); // no warning
}
int checkGreaterThanFloatDeclCompare4(void) {
float f = 7.1F;
return (7.1F > f); // no warning
}
int checkGreaterThanFloatDeclCompare5(void) {
float f = 7.1F;
int t = 7;
return (t > f); // no warning
}
int checkGreaterThanFloatDeclCompare6(void) {
float f = 7.1F;
int t = 7;
return (f > t); // no warning
}
int checkGreaterThanCastFloatDeclCompare11(void) {
float f = 7.1F;
return ((int)f > (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkGreaterThanCastFloatDeclCompare12(void) {
float f = 7.1F;
return ((char)f > (int)f); // no warning
}
int checkGreaterThanBinaryOpFloatCompare1(void) {
int res;
float f= 3.14F;
res = (f + 3.14F > f + 3.14F); // no warning
return (0);
}
int checkGreaterThanBinaryOpFloatCompare2(void) {
float f = 7.1F;
float g = 7.1F;
return (f + 3.14F > g + 3.14F); // no warning
}
int checkGreaterThanBinaryOpFloatCompare3(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F > (int)f + 3.14F); // no warning
return (0);
}
int checkGreaterThanBinaryOpFloatCompare4(void) {
int res;
float f= 3.14F;
res = ((int)f + 3.14F > (char)f + 3.14F); // no warning
return (0);
}
int checkGreaterThanNestedBinaryOpFloatCompare1(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (3.14F - u)*t) > ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkGreaterThanNestedBinaryOpFloatCompare2(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) > ((int)f + (3.14F - u)*t)); // no warning
return (0);
}
int checkGreaterThanNestedBinaryOpFloatCompare3(void) {
int res;
int t= 1;
int u= 2;
float f= 3.14F;
res = (((int)f + (u - 3.14F)*t) > ((int)f + (3.14F - u)*(f + t > f + t))); // no warning
return (0);
}
/* end GT with float */
/* GT with int */
int checkGreaterThanIntLiteralCompare1(void) {
return (5 > 5); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkGreaterThanIntLiteralCompare2(void) {
return (6 > 7); // no warning
}
int checkGreaterThanIntDeclCompare1(void) {
int f = 7;
int g = 7;
return (f > g); // no warning
}
int checkGreaterThanIntDeclCompare3(void) {
int f = 7;
return (f > 7); // no warning
}
int checkGreaterThanIntDeclCompare4(void) {
int f = 7;
return (7 > f); // no warning
}
int checkGreaterThanCastIntDeclCompare11(void) {
int f = 7;
return ((int)f > (int)f); // expected-warning {{comparison of identical expressions always evaluates to false}}
}
int checkGreaterThanCastIntDeclCompare12(void) {
int f = 7;
return ((char)f > (int)f); // no warning
}
int checkGreaterThanBinaryOpIntCompare1(void) {
int res;
int f= 3;
res = (f + 3 > f + 3); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkGreaterThanBinaryOpIntCompare2(void) {
int f = 7;
int g = 7;
return (f + 3 > g + 3); // no warning
}
int checkGreaterThanBinaryOpIntCompare3(void) {
int res;
int f= 3;
res = ((int)f + 3 > (int)f + 3); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkGreaterThanBinaryOpIntCompare4(void) {
int res;
int f= 3;
res = ((int)f + 3 > (char)f + 3); // no warning
return (0);
}
int checkGreaterThanNestedBinaryOpIntCompare1(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (3 - u)*t) > ((int)f + (3 - u)*t)); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
int checkGreaterThanNestedBinaryOpIntCompare2(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) > ((int)f + (3 - u)*t)); // no warning
return (0);
}
int checkGreaterThanNestedBinaryOpIntCompare3(void) {
int res;
int t= 1;
int u= 2;
int f= 3;
res = (((int)f + (u - 3)*t) > ((int)f + (3 - u)*(t + u > t + u))); // expected-warning {{comparison of identical expressions always evaluates to false}}
return (0);
}
/* end GT with int */
/* end GT */
/* Checking use of identical expressions in conditional operator*/
unsigned test_unsigned(unsigned a) {
unsigned b = 1;
a = a > 5 ? b : b; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
return a;
}
void test_signed() {
int a = 0;
a = a > 5 ? a : a; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_bool(bool a) {
a = a > 0 ? a : a; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_float() {
float a = 0;
float b = 0;
a = a > 5 ? a : a; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
const char *test_string() {
float a = 0;
return a > 5 ? "abc" : "abc"; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_unsigned_expr() {
unsigned a = 0;
unsigned b = 0;
a = a > 5 ? a+b : a+b; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_signed_expr() {
int a = 0;
int b = 1;
a = a > 5 ? a+b : a+b; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_bool_expr(bool a) {
bool b = 0;
a = a > 0 ? a&&b : a&&b; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_unsigned_expr_negative() {
unsigned a = 0;
unsigned b = 0;
a = a > 5 ? a+b : b+a; // no warning
}
void test_signed_expr_negative() {
int a = 0;
int b = 1;
a = a > 5 ? b+a : a+b; // no warning
}
void test_bool_expr_negative(bool a) {
bool b = 0;
a = a > 0 ? a&&b : b&&a; // no warning
}
void test_float_expr_positive() {
float a = 0;
float b = 0;
a = a > 5 ? a+b : a+b; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_expr_positive_func() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a+func() : a+func(); // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_expr_negative_func() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a+func() : a+func2(); // no warning
}
void test_expr_positive_funcParam() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a+funcParam(b) : a+funcParam(b); // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_expr_negative_funcParam() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a+funcParam(a) : a+funcParam(b); // no warning
}
void test_expr_positive_inc() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a++ : a++; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_expr_negative_inc() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a++ : b++; // no warning
}
void test_expr_positive_assign() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a=1 : a=1; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_expr_negative_assign() {
unsigned a = 0;
unsigned b = 1;
a = a > 5 ? a=1 : a=2; // no warning
}
void test_signed_nested_expr() {
int a = 0;
int b = 1;
int c = 3;
a = a > 5 ? a+b+(c+a)*(a + b*(c+a)) : a+b+(c+a)*(a + b*(c+a)); // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_signed_nested_expr_negative() {
int a = 0;
int b = 1;
int c = 3;
a = a > 5 ? a+b+(c+a)*(a + b*(c+a)) : a+b+(c+a)*(a + b*(a+c)); // no warning
}
void test_signed_nested_cond_expr_negative() {
int a = 0;
int b = 1;
int c = 3;
a = a > 5 ? (b > 5 ? 1 : 4) : (b > 5 ? 2 : 4); // no warning
}
void test_signed_nested_cond_expr() {
int a = 0;
int b = 1;
int c = 3;
a = a > 5 ? (b > 5 ? 1 : 4) : (b > 5 ? 4 : 4); // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_identical_branches1(bool b) {
int i = 0;
if (b) { // expected-warning {{true and false branches are identical}}
++i;
} else {
++i;
}
}
void test_identical_branches2(bool b) {
int i = 0;
if (b) { // expected-warning {{true and false branches are identical}}
++i;
} else
++i;
}
void test_identical_branches3(bool b) {
int i = 0;
if (b) { // no warning
++i;
} else {
i++;
}
}
void test_identical_branches4(bool b) {
int i = 0;
if (b) { // expected-warning {{true and false branches are identical}}
} else {
}
}
void test_identical_branches_break(bool b) {
while (true) {
if (b) // expected-warning {{true and false branches are identical}}
break;
else
break;
}
}
void test_identical_branches_continue(bool b) {
while (true) {
if (b) // expected-warning {{true and false branches are identical}}
continue;
else
continue;
}
}
void test_identical_branches_func(bool b) {
if (b) // expected-warning {{true and false branches are identical}}
func();
else
func();
}
void test_identical_branches_func_arguments(bool b) {
if (b) // no-warning
funcParam(1);
else
funcParam(2);
}
void test_identical_branches_cast1(bool b) {
long v = -7;
if (b) // no-warning
v = (signed int) v;
else
v = (unsigned int) v;
}
void test_identical_branches_cast2(bool b) {
long v = -7;
if (b) // expected-warning {{true and false branches are identical}}
v = (signed int) v;
else
v = (signed int) v;
}
int test_identical_branches_return_int(bool b) {
int i = 0;
if (b) { // expected-warning {{true and false branches are identical}}
i++;
return i;
} else {
i++;
return i;
}
}
int test_identical_branches_return_func(bool b) {
if (b) { // expected-warning {{true and false branches are identical}}
return func();
} else {
return func();
}
}
void test_identical_branches_for(bool b) {
int i;
int j;
if (b) { // expected-warning {{true and false branches are identical}}
for (i = 0, j = 0; i < 10; i++)
j += 4;
} else {
for (i = 0, j = 0; i < 10; i++)
j += 4;
}
}
void test_identical_branches_while(bool b) {
int i = 10;
if (b) { // expected-warning {{true and false branches are identical}}
while (func())
i--;
} else {
while (func())
i--;
}
}
void test_identical_branches_while_2(bool b) {
int i = 10;
if (b) { // no-warning
while (func())
i--;
} else {
while (func())
i++;
}
}
void test_identical_branches_do_while(bool b) {
int i = 10;
if (b) { // expected-warning {{true and false branches are identical}}
do {
i--;
} while (func());
} else {
do {
i--;
} while (func());
}
}
void test_identical_branches_if(bool b, int i) {
if (b) { // expected-warning {{true and false branches are identical}}
if (i < 5)
i += 10;
} else {
if (i < 5)
i += 10;
}
}
void test_identical_bitwise1() {
int a = 5 | 5; // expected-warning {{identical expressions on both sides of bitwise operator}}
}
void test_identical_bitwise2() {
int a = 5;
int b = a | a; // expected-warning {{identical expressions on both sides of bitwise operator}}
}
void test_identical_bitwise3() {
int a = 5;
int b = (a | a); // expected-warning {{identical expressions on both sides of bitwise operator}}
}
void test_identical_bitwise4() {
int a = 4;
int b = a | 4; // no-warning
}
void test_identical_bitwise5() {
int a = 4;
int b = 4;
int c = a | b; // no-warning
}
void test_identical_bitwise6() {
int a = 5;
int b = a | 4 | a; // expected-warning {{identical expressions on both sides of bitwise operator}}
}
void test_identical_bitwise7() {
int a = 5;
int b = func() | func(); // no-warning
}
void test_identical_logical1(int a) {
if (a == 4 && a == 4) // expected-warning {{identical expressions on both sides of logical operator}}
;
}
void test_identical_logical2(int a) {
if (a == 4 || a == 5 || a == 4) // expected-warning {{identical expressions on both sides of logical operator}}
;
}
void test_identical_logical3(int a) {
if (a == 4 || a == 5 || a == 6) // no-warning
;
}
void test_identical_logical4(int a) {
if (a == func() || a == func()) // no-warning
;
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wlogical-op-parentheses"
void test_identical_logical5(int x, int y) {
if (x == 4 && y == 5 || x == 4 && y == 6) // no-warning
;
}
void test_identical_logical6(int x, int y) {
if (x == 4 && y == 5 || x == 4 && y == 5) // expected-warning {{identical expressions on both sides of logical operator}}
;
}
void test_identical_logical7(int x, int y) {
// FIXME: We should warn here
if (x == 4 && y == 5 || x == 4)
;
}
void test_identical_logical8(int x, int y) {
// FIXME: We should warn here
if (x == 4 || y == 5 && x == 4)
;
}
void test_identical_logical9(int x, int y) {
// FIXME: We should warn here
if (x == 4 || x == 4 && y == 5)
;
}
#pragma clang diagnostic pop
void test_warn_chained_if_stmts_1(int x) {
if (x == 1)
;
else if (x == 1) // expected-warning {{expression is identical to previous condition}}
;
}
void test_warn_chained_if_stmts_2(int x) {
if (x == 1)
;
else if (x == 1) // expected-warning {{expression is identical to previous condition}}
;
else if (x == 1) // expected-warning {{expression is identical to previous condition}}
;
}
void test_warn_chained_if_stmts_3(int x) {
if (x == 1)
;
else if (x == 2)
;
else if (x == 1) // expected-warning {{expression is identical to previous condition}}
;
}
void test_warn_chained_if_stmts_4(int x) {
if (x == 1)
;
else if (func())
;
else if (x == 1) // expected-warning {{expression is identical to previous condition}}
;
}
void test_warn_chained_if_stmts_5(int x) {
if (x & 1)
;
else if (x & 1) // expected-warning {{expression is identical to previous condition}}
;
}
void test_warn_chained_if_stmts_6(int x) {
if (x == 1)
;
else if (x == 2)
;
else if (x == 2) // expected-warning {{expression is identical to previous condition}}
;
else if (x == 3)
;
}
void test_warn_chained_if_stmts_7(int x) {
if (x == 1)
;
else if (x == 2)
;
else if (x == 3)
;
else if (x == 2) // expected-warning {{expression is identical to previous condition}}
;
else if (x == 5)
;
}
void test_warn_chained_if_stmts_8(int x) {
if (x == 1)
;
else if (x == 2)
;
else if (x == 3)
;
else if (x == 2) // expected-warning {{expression is identical to previous condition}}
;
else if (x == 5)
;
else if (x == 3) // expected-warning {{expression is identical to previous condition}}
;
else if (x == 7)
;
}
void test_nowarn_chained_if_stmts_1(int x) {
if (func())
;
else if (func()) // no-warning
;
}
void test_nowarn_chained_if_stmts_2(int x) {
if (func())
;
else if (x == 1)
;
else if (func()) // no-warning
;
}
void test_nowarn_chained_if_stmts_3(int x) {
if (x++)
;
else if (x++) // no-warning
;
}
void test_warn_wchar() {
const wchar_t * a = 0 ? L"Warning" : L"Warning"; // expected-warning {{identical expressions on both sides of ':' in conditional expression}}
}
void test_nowarn_wchar() {
const wchar_t * a = 0 ? L"No" : L"Warning";
}
void test_nowarn_long() {
int a = 0, b = 0;
long c;
if (0) {
b -= a;
c = 0;
} else { // no-warning
b -= a;
c = 0LL;
}
}
// Identical inner conditions
void test_warn_inner_if_1(int x) {
if (x == 1) {
if (x == 1) // expected-warning {{conditions of the inner and outer statements are identical}}
;
}
// FIXME: Should warn here. The warning is currently not emitted because there
// is code between the conditions.
if (x == 1) {
int y = x;
if (x == 1)
;
}
}
void test_nowarn_inner_if_1(int x) {
// Don't warn when condition has side effects.
if (x++ == 1) {
if (x++ == 1)
;
}
// Don't warn when x is changed before inner condition.
if (x < 10) {
x++;
if (x < 10)
;
}
}
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