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