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5a559e64a9
This commit adds the flag -fno-c++-static-destructors and the attributes [[clang::no_destroy]] and [[clang::always_destroy]]. no_destroy specifies that a specific static or thread duration variable shouldn't have it's destructor registered, and is the default in -fno-c++-static-destructors mode. always_destroy is the opposite, and is the default in -fc++-static-destructors mode. A variable whose destructor is disabled (either because of -fno-c++-static-destructors or [[clang::no_destroy]]) doesn't count as a use of the destructor, so we don't do any access checking or mark it referenced. We also don't emit -Wexit-time-destructors for these variables. rdar://21734598 Differential revision: https://reviews.llvm.org/D50994 llvm-svn: 340306
51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -Wexit-time-destructors %s -verify
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namespace test1 {
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struct A { ~A(); };
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A a; // expected-warning {{declaration requires an exit-time destructor}}
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A b[10]; // expected-warning {{declaration requires an exit-time destructor}}
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A c[10][10]; // expected-warning {{declaration requires an exit-time destructor}}
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A &d = a;
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A &e = b[5];
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A &f = c[5][7];
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}
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namespace test2 {
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void f() {
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struct A { ~A() { } };
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static A a; // expected-warning {{declaration requires an exit-time destructor}}
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static A b[10]; // expected-warning {{declaration requires an exit-time destructor}}
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static A c[10][10]; // expected-warning {{declaration requires an exit-time destructor}}
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static A &d = a;
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static A &e = b[5];
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static A &f = c[5][7];
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}
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}
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namespace test3 {
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struct A { ~A() = default; };
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A a;
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struct B { ~B(); };
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struct C : B { ~C() = default; };
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C c; // expected-warning {{exit-time destructor}}
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class D {
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friend struct E;
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~D() = default;
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};
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struct E : D {
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D d;
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~E() = default;
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};
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E e;
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}
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namespace test4 {
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struct A { ~A(); };
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[[clang::no_destroy]] A a; // no warning
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}
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