1 // RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify %s 2 3 void clang_analyzer_eval(int); 4 #define CHECK(expr) if (!(expr)) return; clang_analyzer_eval(expr) 5 6 void testPersistentConstraints(int x, int y) { 7 // Basic check 8 CHECK(x); // expected-warning{{TRUE}} 9 CHECK(x & 1); // expected-warning{{TRUE}} 10 11 CHECK(1 - x); // expected-warning{{TRUE}} 12 CHECK(x & y); // expected-warning{{TRUE}} 13 } 14 15 int testConstantShifts_PR18073(int which) { 16 // FIXME: We should have a checker that actually specifically checks bitwise 17 // shifts against the width of the LHS's /static/ type, rather than just 18 // having BasicValueFactory return "undefined" when dealing with two constant 19 // operands. 20 switch (which) { 21 case 1: 22 return 0ULL << 63; // no-warning 23 case 2: 24 return 0ULL << 64; // expected-warning{{The result of the left shift is undefined due to shifting by '64', which is greater or equal to the width of type 'unsigned long long'}} 25 case 3: 26 return 0ULL << 65; // expected-warning{{The result of the left shift is undefined due to shifting by '65', which is greater or equal to the width of type 'unsigned long long'}} 27 28 default: 29 return 0; 30 } 31 } 32 33 int testOverflowShift(int a) { 34 if (a == 323) { 35 return 1 << a; // expected-warning{{The result of the left shift is undefined due to shifting by '323', which is greater or equal to the width of type 'int'}} 36 } 37 return 0; 38 } 39 40 int testNegativeShift(int a) { 41 if (a == -5) { 42 return 1 << a; // expected-warning{{The result of the left shift is undefined because the right operand is negative}} 43 } 44 return 0; 45 } 46 47 int testNegativeLeftShift(int a) { 48 if (a == -3) { 49 return a << 1; // expected-warning{{The result of the left shift is undefined because the left operand is negative}} 50 } 51 return 0; 52 } 53 54 int testUnrepresentableLeftShift(int a) { 55 if (a == 8) 56 return a << 30; // expected-warning{{The result of the left shift is undefined due to shifting '8' by '30', which is unrepresentable in the unsigned version of the return type 'int'}} 57 return 0; 58 } 59