107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
// RUN: %clang_cc1 -fno-rtti %s -emit-llvm -o %t -triple=i386-pc-win32 -fdump-vtable-layouts 2>&1 | FileCheck --check-prefix=VFTABLES %s
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// RUN: FileCheck --check-prefix=GLOBALS %s < %t
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// RUN: FileCheck --check-prefix=CODEGEN %s < %t
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namespace test1 {
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// Some covariant types.
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struct A { int a; };
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struct B { int b; };
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struct C : A, B { int c; };
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struct D : C { int d; };
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struct E : D { int e; };
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// One base class and two overrides, all with covariant return types.
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struct H { virtual B *foo(); };
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struct I : H { virtual C *foo(); };
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struct J : I { virtual D *foo(); J(); };
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struct K : J { virtual E *foo(); K(); };
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J::J() {}
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// VFTABLES-LABEL: VFTable for 'test1::H' in 'test1::I' in 'test1::J' (3 entries).
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// VFTABLES-NEXT: 0 | test1::D *test1::J::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test1::B *'): 4 non-virtual]
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// VFTABLES-NEXT: 1 | test1::D *test1::J::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test1::C *'): 0 non-virtual]
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// VFTABLES-NEXT: 2 | test1::D *test1::J::foo()
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// GLOBALS-LABEL: @"\01??_7J@test1@@6B@" = linkonce_odr unnamed_addr constant [3 x i8*]
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// GLOBALS: @"\01?foo@J@test1@@QAEPAUB@2@XZ"
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// GLOBALS: @"\01?foo@J@test1@@QAEPAUC@2@XZ"
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// GLOBALS: @"\01?foo@J@test1@@UAEPAUD@2@XZ"
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K::K() {}
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// VFTABLES-LABEL: VFTable for 'test1::H' in 'test1::I' in 'test1::J' in 'test1::K' (4 entries).
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// VFTABLES-NEXT: 0 | test1::E *test1::K::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test1::B *'): 4 non-virtual]
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// VFTABLES-NEXT: 1 | test1::E *test1::K::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test1::C *'): 0 non-virtual]
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// VFTABLES-NEXT: 2 | test1::E *test1::K::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test1::D *'): 0 non-virtual]
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// VFTABLES-NEXT: 3 | test1::E *test1::K::foo()
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// Only B to C requires adjustment, but we get 3 thunks in K's vftable, two of
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// which are trivial.
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// GLOBALS-LABEL: @"\01??_7K@test1@@6B@" = linkonce_odr unnamed_addr constant [4 x i8*]
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// GLOBALS: @"\01?foo@K@test1@@QAEPAUB@2@XZ"
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// GLOBALS: @"\01?foo@K@test1@@QAEPAUC@2@XZ"
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// GLOBALS: @"\01?foo@K@test1@@QAEPAUD@2@XZ"
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// GLOBALS: @"\01?foo@K@test1@@UAEPAUE@2@XZ"
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// This thunk has a return adjustment.
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// CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUB@2@XZ"
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// CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ"
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// CODEGEN: icmp {{.*}}, null
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// CODEGEN: getelementptr
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// CODEGEN: ret
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// These two don't.
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// CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUC@2@XZ"
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// CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ"
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// CODEGEN-NEXT: ret
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// CODEGEN-LABEL: define {{.*}} @"\01?foo@K@test1@@QAEPAUD@2@XZ"
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// CODEGEN: call {{.*}} @"\01?foo@K@test1@@UAEPAUE@2@XZ"
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// CODEGEN-NEXT: ret
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}
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namespace test2 {
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// Covariant types. D* is not trivially convertible to C*.
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struct A { int a; };
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struct B { int b; };
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struct C : B { int c; };
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struct D : A, C { int d; };
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struct E : D { int e; };
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// J's foo will require an adjusting thunk, and K will require a trivial thunk.
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struct H { virtual B *foo(); };
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struct I : H { virtual C *foo(); };
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struct J : I { virtual D *foo(); J(); };
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struct K : J { virtual E *foo(); K(); };
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J::J() {}
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// VFTABLES-LABEL: VFTable for 'test2::H' in 'test2::I' in 'test2::J' (2 entries).
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// VFTABLES-NEXT: 0 | test2::D *test2::J::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test2::B *'): 4 non-virtual]
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// VFTABLES-NEXT: 1 | test2::D *test2::J::foo()
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// GLOBALS-LABEL: @"\01??_7J@test2@@6B@" = linkonce_odr unnamed_addr constant [2 x i8*]
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K::K() {}
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// VFTABLES-LABEL: VFTable for 'test2::H' in 'test2::I' in 'test2::J' in 'test2::K' (3 entries).
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// VFTABLES-NEXT: 0 | test2::E *test2::K::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test2::B *'): 4 non-virtual]
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// VFTABLES-NEXT: 1 | test2::E *test2::K::foo()
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// VFTABLES-NEXT: [return adjustment (to type 'struct test2::D *'): 0 non-virtual]
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// VFTABLES-NEXT: 2 | test2::E *test2::K::foo()
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// GLOBALS-LABEL: @"\01??_7K@test2@@6B@" = linkonce_odr unnamed_addr constant [3 x i8*]
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}
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