llvm-project/clang/test/CodeGenCXX/union-dtor.cpp

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706 B
C++

// RUN: %clang_cc1 -std=c++11 %s -S -o - -emit-llvm | FileCheck %s
// PR10304: destructors should not call destructors for variant members.
template<bool b = false>
struct Foo {
Foo() { static_assert(b, "Foo::Foo used"); }
~Foo() { static_assert(b, "Foo::~Foo used"); }
};
struct Bar {
Bar();
~Bar();
};
union FooBar {
FooBar() {}
~FooBar() {}
Foo<> foo;
Bar bar;
};
struct Variant {
Variant() {}
~Variant() {}
union {
Foo<> foo;
Bar bar;
};
};
FooBar foobar;
Variant variant;
// The ctor and dtor of Foo<> and Bar should not be mentioned in the resulting
// code.
//
// CHECK-NOT: 3FooILb1EEC1
// CHECK-NOT: 3BarC1
//
// CHECK-NOT: 3FooILb1EED1
// CHECK-NOT: 3BarD1