1 // RUN: %clang_cc1 -analyze -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 // Sanity check 8 CHECK(x); // expected-warning{{TRUE}} 9 CHECK(x & 1); // expected-warning{{TRUE}} 10 11 // False positives due to SValBuilder giving up on certain kinds of exprs. 12 CHECK(1 - x); // expected-warning{{UNKNOWN}} 13 CHECK(x & y); // expected-warning{{UNKNOWN}} 14 } 15 16 int testConstantShifts_PR18073(int which) { 17 // FIXME: We should have a checker that actually specifically checks bitwise 18 // shifts against the width of the LHS's /static/ type, rather than just 19 // having BasicValueFactory return "undefined" when dealing with two constant 20 // operands. 21 switch (which) { 22 case 1: 23 return 0ULL << 63; // no-warning 24 case 2: 25 return 0ULL << 64; // expected-warning{{The result of the '<<' expression is undefined}} 26 case 3: 27 return 0ULL << 65; // expected-warning{{The result of the '<<' expression is undefined}} 28 29 default: 30 return 0; 31 } 32 }
