forked from OSchip/llvm-project
303 lines
7.0 KiB
C++
303 lines
7.0 KiB
C++
// RUN: %clang_cc1 %s -fno-rtti -triple=i386-pc-win32 -emit-llvm -o %t.ll -fdump-vtable-layouts >%t
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// RUN: FileCheck %s < %t
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// RUN: FileCheck --check-prefix=MANGLING %s < %t.ll
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namespace test1 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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// Add an extra virtual method so it's easier to check for the absence of thunks.
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virtual void h();
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};
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struct X : A, B {
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// CHECK-LABEL: VFTable for 'test1::A' in 'test1::X' (1 entry)
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// CHECK-NEXT: 0 | void test1::X::f()
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// CHECK-LABEL: VFTable for 'test1::B' in 'test1::X' (2 entries)
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// CHECK-NEXT: 0 | void test1::B::g()
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// CHECK-NEXT: 1 | void test1::B::h()
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// CHECK-LABEL: VFTable indices for 'test1::X' (1 entry)
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// CHECK-NEXT: 0 | void test1::X::f()
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// MANGLING-DAG: @"\01??_7X@test1@@6BA@1@@"
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// MANGLING-DAG: @"\01??_7X@test1@@6BB@1@@"
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// Overrides only the left child's method (A::f), needs no thunks.
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virtual void f();
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} x;
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void build_vftable(X *obj) { obj->f(); }
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}
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namespace test2 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct X : A, B {
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// CHECK-LABEL: VFTable for 'test2::A' in 'test2::X' (1 entry)
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// CHECK-NEXT: 0 | void test2::A::f()
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// CHECK-LABEL: VFTable for 'test2::B' in 'test2::X' (2 entries)
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// CHECK-NEXT: 0 | void test2::X::g()
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// CHECK-NEXT: 1 | void test2::B::h()
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// CHECK-LABEL: VFTable indices for 'test2::X' (1 entry).
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// CHECK-NEXT: via vfptr at offset 4
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// CHECK-NEXT: 0 | void test2::X::g()
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// Overrides only the right child's method (B::g), needs this adjustment but
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// not thunks.
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virtual void g();
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};
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void build_vftable(X *obj) { obj->g(); }
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}
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namespace test3 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct X : A, B {
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// CHECK-LABEL: VFTable for 'test3::A' in 'test3::X' (2 entries)
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// CHECK-NEXT: 0 | void test3::A::f()
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// CHECK-NEXT: 1 | void test3::X::i()
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// CHECK-LABEL: VFTable for 'test3::B' in 'test3::X' (2 entries)
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// CHECK-NEXT: 0 | void test3::B::g()
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// CHECK-NEXT: 1 | void test3::B::h()
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// CHECK-LABEL: VFTable indices for 'test3::X' (1 entry).
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// CHECK-NEXT: 1 | void test3::X::i()
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// Only adds a new method.
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virtual void i();
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};
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void build_vftable(X *obj) { obj->i(); }
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}
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namespace test4 {
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struct A {
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virtual void f();
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};
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struct Empty { }; // Doesn't have a vftable!
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// Only the right base has a vftable, so it's laid out before the left one!
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struct X : Empty, A {
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// CHECK-LABEL: VFTable for 'test4::A' in 'test4::X' (1 entry)
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// CHECK-NEXT: 0 | void test4::X::f()
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// CHECK-LABEL: VFTable indices for 'test4::X' (1 entry).
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// CHECK-NEXT: 0 | void test4::X::f()
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// MANGLING-DAG: @"\01??_7X@test4@@6B@"
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virtual void f();
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} x;
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void build_vftable(X *obj) { obj->f(); }
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}
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namespace test5 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct C : A, B {
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virtual void f();
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};
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struct X : C {
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// CHECK-LABEL: VFTable for 'test5::A' in 'test5::C' in 'test5::X' (1 entry).
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// CHECK-NEXT: 0 | void test5::X::f()
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// CHECK-LABEL: VFTable for 'test5::B' in 'test5::C' in 'test5::X' (2 entries).
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// CHECK-NEXT: 0 | void test5::B::g()
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// CHECK-NEXT: 1 | void test5::B::h()
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// CHECK-LABEL: VFTable indices for 'test5::X' (1 entry).
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// CHECK-NEXT: 0 | void test5::X::f()
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// MANGLING-DAG: @"\01??_7X@test5@@6BA@1@@"
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// MANGLING-DAG: @"\01??_7X@test5@@6BB@1@@"
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// Overrides both C::f and A::f.
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virtual void f();
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} x;
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void build_vftable(X *obj) { obj->f(); }
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}
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namespace test6 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct C : A, B {
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virtual void g();
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};
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struct X : C {
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// CHECK-LABEL: VFTable for 'test6::A' in 'test6::C' in 'test6::X' (1 entry).
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// CHECK-NEXT: 0 | void test6::A::f()
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// CHECK-LABEL: VFTable for 'test6::B' in 'test6::C' in 'test6::X' (2 entries).
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// CHECK-NEXT: 0 | void test6::X::g()
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// CHECK-NEXT: 1 | void test6::B::h()
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// CHECK-LABEL: VFTable indices for 'test6::X' (1 entry).
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// CHECK-NEXT: via vfptr at offset 4
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// CHECK-NEXT: 0 | void test6::X::g()
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// Overrides both C::g and B::g.
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virtual void g();
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};
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void build_vftable(X *obj) { obj->g(); }
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}
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namespace test7 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct C : A, B {
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// Only adds a new method.
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virtual void i();
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};
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struct X : C {
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// CHECK-LABEL: VFTable for 'test7::A' in 'test7::C' in 'test7::X' (2 entries).
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// CHECK-NEXT: 0 | void test7::A::f()
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// CHECK-NEXT: 1 | void test7::C::i()
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// CHECK-LABEL: VFTable for 'test7::B' in 'test7::C' in 'test7::X' (2 entries).
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// CHECK-NEXT: 0 | void test7::X::g()
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// CHECK-NEXT: 1 | void test7::B::h()
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// CHECK-LABEL: VFTable indices for 'test7::X' (1 entry).
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// CHECK-NEXT: via vfptr at offset 4
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// CHECK-NEXT: 0 | void test7::X::g()
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// Overrides grandparent's B::g.
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virtual void g();
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};
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void build_vftable(X *obj) { obj->g(); }
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}
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namespace test8 {
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struct A {
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virtual void f();
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};
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struct B : A {
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virtual void g();
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};
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// There are two 'A' subobjects in this class.
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struct X : A, B {
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// CHECK-LABEL: VFTable for 'test8::A' in 'test8::X' (2 entries).
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// CHECK-NEXT: 0 | void test8::A::f()
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// CHECK-NEXT: 1 | void test8::X::h()
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// CHECK-LABEL: VFTable for 'test8::A' in 'test8::B' in 'test8::X' (2 entries).
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// CHECK-NEXT: 0 | void test8::A::f()
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// CHECK-NEXT: 1 | void test8::B::g()
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// CHECK-LABEL: VFTable indices for 'test8::X' (1 entry).
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// CHECK-NEXT: 1 | void test8::X::h()
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// MANGLING-DAG: @"\01??_7X@test8@@6BA@1@@"
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// MANGLING-DAG: @"\01??_7X@test8@@6BB@1@@"
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virtual void h();
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} x;
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void build_vftable(X *obj) { obj->h(); }
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}
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namespace test9 {
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struct A {
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virtual void f();
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};
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struct B {
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virtual void g();
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virtual void h();
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};
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struct C : A, B {
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// Overrides only the left child's method (A::f).
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virtual void f();
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};
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struct D : A, B {
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// Overrides only the right child's method (B::g).
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virtual void g();
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};
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// 2-level structure with repeating subobject types, but no thunks needed.
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struct X : C, D {
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// CHECK-LABEL: VFTable for 'test9::A' in 'test9::C' in 'test9::X' (2 entries)
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// CHECK-NEXT: 0 | void test9::C::f()
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// CHECK-NEXT: 1 | void test9::X::z()
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// CHECK-LABEL: VFTable for 'test9::B' in 'test9::C' in 'test9::X' (2 entries)
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// CHECK-NEXT: 0 | void test9::B::g()
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// CHECK-NEXT: 1 | void test9::B::h()
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// CHECK-LABEL: VFTable for 'test9::A' in 'test9::D' in 'test9::X' (1 entry)
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// CHECK-NEXT: 0 | void test9::A::f()
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// CHECK-LABEL: VFTable for 'test9::B' in 'test9::D' in 'test9::X' (2 entries)
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// CHECK-NEXT: 0 | void test9::D::g()
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// CHECK-NEXT: 1 | void test9::B::h()
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// CHECK-LABEL: VFTable indices for 'test9::X' (1 entry).
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// CHECK-NEXT: 1 | void test9::X::z()
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// MANGLING-DAG: @"\01??_7X@test9@@6BA@1@C@1@@"
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// MANGLING-DAG: @"\01??_7X@test9@@6BA@1@D@1@@"
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// MANGLING-DAG: @"\01??_7X@test9@@6BB@1@C@1@@"
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// MANGLING-DAG: @"\01??_7X@test9@@6BB@1@D@1@@"
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virtual void z();
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} x;
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void build_vftable(test9::X *obj) { obj->z(); }
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}
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