forked from OSchip/llvm-project
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -triple x86_64-apple-darwin13 -Wno-shift-count-overflow -verify %s
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void clang_analyzer_eval(int);
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#define CHECK(expr) if (!(expr)) return; clang_analyzer_eval(expr)
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void testPersistentConstraints(int x, int y) {
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// Basic check
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CHECK(x); // expected-warning{{TRUE}}
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CHECK(x & 1); // expected-warning{{TRUE}}
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CHECK(1 - x); // expected-warning{{TRUE}}
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CHECK(x & y); // expected-warning{{TRUE}}
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}
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int testConstantShifts_PR18073(int which) {
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// FIXME: We should have a checker that actually specifically checks bitwise
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// shifts against the width of the LHS's /static/ type, rather than just
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// having BasicValueFactory return "undefined" when dealing with two constant
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// operands.
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switch (which) {
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case 1:
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return 0ULL << 63; // no-warning
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case 2:
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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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case 3:
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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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default:
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return 0;
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}
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}
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int testOverflowShift(int a) {
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if (a == 323) {
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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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}
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return 0;
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}
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int testNegativeShift(int a) {
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if (a == -5) {
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return 1 << a; // expected-warning{{The result of the left shift is undefined because the right operand is negative}}
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}
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return 0;
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}
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int testNegativeLeftShift(int a) {
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if (a == -3) {
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return a << 1; // expected-warning{{The result of the left shift is undefined because the left operand is negative}}
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}
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return 0;
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}
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int testUnrepresentableLeftShift(int a) {
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if (a == 8)
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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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return 0;
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}
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