derek.holloway
7502bf64a4
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47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
// RUN: %clang_cc1 -std=c++20 -fsyntax-only -ast-dump -verify %s | FileCheck %s
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// Ensure qualifiers are preserved during derived-to-base conversion.
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namespace PR127683 {
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struct Base {
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int Val;
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};
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struct Derived : Base { };
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// Value-initialize base class subobjects with type qualifiers.
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volatile Derived VObj;
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const Derived CObj{}; // expected-note{{variable 'CObj' declared const here}}
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const volatile Derived CVObj{}; // expected-note{{variable 'CVObj' declared const here}}
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__attribute__((address_space(1))) Derived AddrSpaceObj{};
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void test_store() {
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// CHECK: `-ImplicitCastExpr {{.*}} 'volatile PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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VObj.Val = 0;
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// CHECK: `-ImplicitCastExpr {{.*}} 'const PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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CObj.Val = 1; // expected-error {{cannot assign to variable 'CObj' with const-qualified type 'const Derived'}}
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// CHECK: `-ImplicitCastExpr {{.*}} 'const volatile PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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CVObj.Val = 1; // expected-error {{cannot assign to variable 'CVObj' with const-qualified type 'const volatile Derived'}}
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// CHECK: `-ImplicitCastExpr {{.*}} '__attribute__((address_space(1))) PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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AddrSpaceObj.Val = 1;
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}
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void test_load() {
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// CHECK: `-ImplicitCastExpr {{.*}} <col:30> 'volatile PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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[[maybe_unused]] int Val = VObj.Val;
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// CHECK: `-ImplicitCastExpr {{.*}} 'const PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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Val = CObj.Val;
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// CHECK: `-ImplicitCastExpr {{.*}} 'const volatile PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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Val = CVObj.Val;
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// CHECK: `-ImplicitCastExpr {{.*}} '__attribute__((address_space(1))) PR127683::Base' lvalue <UncheckedDerivedToBase (Base)>
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Val = AddrSpaceObj.Val;
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}
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}
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