forked from OSchip/llvm-project
174 lines
2.9 KiB
C++
174 lines
2.9 KiB
C++
// RUN: %clang_cc1 -triple x86_64-unknown-unknown %s -fsyntax-only -verify -Wno-inaccessible-base
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// expected-no-diagnostics
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#define SA(n, p) int a##n[(p) ? 1 : -1]
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namespace Test0 {
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struct A { int a; };
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SA(0, sizeof(A) == 4);
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struct B { };
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SA(1, sizeof(B) == 1);
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struct C : A, B { };
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SA(2, sizeof(C) == 4);
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struct D { };
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struct E : D { };
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struct F : E { };
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struct G : E, F { };
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SA(3, sizeof(G) == 2);
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struct Empty { Empty(); };
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struct I : Empty {
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Empty e;
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};
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SA(4, sizeof(I) == 2);
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struct J : Empty {
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Empty e[2];
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};
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SA(5, sizeof(J) == 3);
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template<int N> struct Derived : Empty, Derived<N - 1> {
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};
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template<> struct Derived<0> : Empty { };
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struct S1 : virtual Derived<10> {
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Empty e;
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};
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SA(6, sizeof(S1) == 24);
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struct S2 : virtual Derived<10> {
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Empty e[2];
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};
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SA(7, sizeof(S2) == 24);
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struct S3 {
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Empty e;
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};
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struct S4 : Empty, S3 {
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};
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SA(8, sizeof(S4) == 2);
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struct S5 : S3, Empty {};
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SA(9, sizeof(S5) == 2);
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struct S6 : S5 { };
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SA(10, sizeof(S6) == 2);
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struct S7 : Empty {
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void *v;
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};
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SA(11, sizeof(S7) == 8);
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struct S8 : Empty, A {
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};
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SA(12, sizeof(S8) == 4);
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}
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namespace Test1 {
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// Test that we don't try to place both A subobjects at offset 0.
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struct A { };
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class B { virtual void f(); };
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class C : A, virtual B { };
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struct D : virtual C { };
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struct E : virtual A { };
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class F : D, E { };
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SA(0, sizeof(F) == 24);
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}
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namespace Test2 {
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// Test that B::a isn't laid out at offset 0.
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struct Empty { };
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struct A : Empty { };
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struct B : Empty {
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A a;
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};
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SA(0, sizeof(B) == 2);
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}
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namespace Test3 {
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// Test that B::a isn't laid out at offset 0.
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struct Empty { };
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struct A { Empty e; };
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struct B : Empty { A a; };
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SA(0, sizeof(B) == 2);
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}
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namespace Test4 {
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// Test that C::Empty isn't laid out at offset 0.
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struct Empty { };
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struct A : Empty { };
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struct B { A a; };
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struct C : B, Empty { };
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SA(0, sizeof(C) == 2);
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}
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namespace Test5 {
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// Test that B::Empty isn't laid out at offset 0.
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struct Empty { };
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struct Field : virtual Empty { };
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struct A {
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Field f;
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};
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struct B : A, Empty { };
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SA(0, sizeof(B) == 16);
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}
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namespace Test6 {
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// Test that B::A isn't laid out at offset 0.
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struct Empty { };
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struct Field : virtual Empty { };
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struct A {
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Field f;
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};
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struct B : Empty, A { };
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SA(0, sizeof(B) == 16);
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}
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namespace Test7 {
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// Make sure we reserve enough space for both bases; PR11745.
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struct Empty { };
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struct Base1 : Empty { };
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struct Base2 : Empty { };
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struct Test : Base1, Base2 {
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char c;
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};
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SA(0, sizeof(Test) == 2);
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}
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namespace Test8 {
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// Test that type sugar doesn't make us incorrectly determine the size of an
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// array of empty classes.
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struct Empty1 {};
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struct Empty2 {};
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struct Empties : Empty1, Empty2 {};
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typedef Empty1 Sugar[4];
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struct A : Empty2, Empties {
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// This must go at offset 2, because if it were at offset 0,
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// V[0][1] would overlap Empties::Empty1.
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Sugar V[1];
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};
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SA(0, sizeof(A) == 6);
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}
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