// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core.IdenticalExpr -verify %s /* Only one expected warning per function allowed at the very end. */ /* '!=' 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* */ /* 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); } /* 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 */