61760bb98c
We now properly bind return value of the trivial copy constructor and assignments of the empty objects. Such operations do not perform any loads from the source, however they preserve identity of the assigned object: ``` Empty e; auto& x = (e = Empty()); clang_analyzer_dump(x); // &e, was Unknown ``` Reviewed By: xazax.hun Differential Revision: https://reviews.llvm.org/D155442
35 lines
792 B
C++
35 lines
792 B
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection -analyzer-config c++-inlining=constructors -verify %s
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template<typename T>
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void clang_analyzer_dump(T&);
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struct aggr {
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int x;
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int y;
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};
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struct empty {
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};
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void test_copy_return() {
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aggr s1 = {1, 2};
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aggr const& cr1 = aggr(s1);
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clang_analyzer_dump(cr1); // expected-warning-re {{&lifetime_extended_object{aggr, cr1, S{{[0-9]+}}} }}
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empty s2;
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empty const& cr2 = empty{s2};
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clang_analyzer_dump(cr2); // expected-warning-re {{&lifetime_extended_object{empty, cr2, S{{[0-9]+}}} }}
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}
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void test_assign_return() {
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aggr s1 = {1, 2};
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aggr d1;
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clang_analyzer_dump(d1 = s1); // expected-warning {{&d1 }}
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empty s2;
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empty d2;
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clang_analyzer_dump(d2 = s2); // expected-warning {{&d2 }} was Unknown
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}
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