forked from OSchip/llvm-project
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -verify %s
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void clang_analyzer_eval(int);
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void clang_analyzer_warnOnDeadSymbol(int);
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namespace test_dead_region_with_live_subregion_in_environment {
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int glob;
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struct A {
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int x;
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void foo() {
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// FIXME: Maybe just let clang_analyzer_eval() work within callees already?
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// The glob variable shouldn't keep our symbol alive because
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// 'x != 0' is concrete 'true'.
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glob = (x != 0);
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}
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};
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void test_A(A a) {
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if (a.x == 0)
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return;
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clang_analyzer_warnOnDeadSymbol(a.x);
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// What we're testing is that a.x is alive until foo() exits.
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a.foo(); // no-warning // (i.e., no 'SYMBOL DEAD' yet)
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// Let's see if constraints on a.x were known within foo().
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clang_analyzer_eval(glob); // expected-warning{{TRUE}}
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// expected-warning@-1{{SYMBOL DEAD}}
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}
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struct B {
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A a;
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int y;
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};
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A &noop(A &a) {
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// This function ensures that the 'b' expression within its argument
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// would be cleaned up before its call, so that only 'b.a' remains
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// in the Environment.
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return a;
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}
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void test_B(B b) {
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if (b.a.x == 0)
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return;
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clang_analyzer_warnOnDeadSymbol(b.a.x);
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// What we're testing is that b.a.x is alive until foo() exits.
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noop(b.a).foo(); // no-warning // (i.e., no 'SYMBOL DEAD' yet)
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// Let's see if constraints on a.x were known within foo().
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clang_analyzer_eval(glob); // expected-warning{{TRUE}}
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// expected-warning@-1{{SYMBOL DEAD}}
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}
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} // namespace test_dead_region_with_live_subregion_in_environment
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