forked from OSchip/llvm-project
35 lines
1.5 KiB
C++
35 lines
1.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-undefined-compare %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wno-tautological-compare -Wtautological-undefined-compare %s
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// RUN: %clang_cc1 -fsyntax-only -verify -Wtautological-compare %s
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void test1(int &x) {
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if (x == 1) { }
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if (&x == 0) { }
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// expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to false}}
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if (&x != 0) { }
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// expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to true}}
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}
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class test2 {
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test2() : x(y) {}
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void foo() {
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if (this == 0) { }
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// expected-warning@-1{{'this' pointer cannot be null in well-defined C++ code; comparison may be assumed to always evaluate to false}}
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if (this != 0) { }
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// expected-warning@-1{{'this' pointer cannot be null in well-defined C++ code; comparison may be assumed to always evaluate to true}}
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}
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void bar() {
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if (x == 1) { }
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if (&x == 0) { }
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// expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to false}}
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if (&x != 0) { }
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// expected-warning@-1{{reference cannot be bound to dereferenced null pointer in well-defined C++ code; comparison may be assumed to always evaluate to true}}
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}
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int &x;
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int y;
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};
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