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