5a722e92af
This expands very slightly what -Wtautological-compare considers to be tautological to include implicit accesses to C++ fields and ObjC ivars. I don't want to turn this into a full expression-identity check, but these additions seem pretty well-contained, and maintain the theme of checking for "x == x". <rdar://problem/14431127> llvm-svn: 190118
24 lines
603 B
C++
24 lines
603 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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int foo(int x) {
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return x == x; // expected-warning {{self-comparison always evaluates to true}}
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}
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struct X {
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bool operator==(const X &x);
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};
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struct A {
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int x;
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X x2;
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int a[3];
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int b[3];
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bool f() { return x == x; } // expected-warning {{self-comparison always evaluates to true}}
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bool g() { return x2 == x2; } // no-warning
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bool h() { return a == b; } // expected-warning {{array comparison always evaluates to false}}
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bool i() {
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int c[3];
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return a == c; // expected-warning {{array comparison always evaluates to false}}
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}
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};
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