| // Multiple inheritance. |
| |
| // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -S -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s |
| |
| // CHECK: %class.C = type { %class.A, %class.B } |
| // CHECK: %class.A = type { i32 (...)** } |
| // CHECK: %class.B = type { i32 (...)** } |
| |
| // VTable for C contains 2 sub-vtables (represented as 2 structs). The first contains the components for B and the second contains the components for C. The RTTI ptr in both arrays still point to the RTTI struct for C. |
| // The component for bar() instead points to a thunk which redirects to C::bar() which overrides B::bar(). |
| // Now that we have a class with 2 parents, the offset to top in the second array is non-zero. |
| // CHECK: @_ZTV1C.local = private unnamed_addr constant { [4 x i32], [3 x i32] } { [4 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }** @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.C*)* dso_local_equivalent @_ZN1C3fooEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.C*)* dso_local_equivalent @_ZN1C3barEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local, i32 0, i32 0, i32 2) to i64)) to i32)], [3 x i32] [i32 -8, i32 trunc (i64 sub (i64 ptrtoint ({ i8*, i8*, i32, i32, i8*, i64, i8*, i64 }** @_ZTI1C.rtti_proxy to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (void (%class.C*)* dso_local_equivalent @_ZThn8_N1C3barEv to i64), i64 ptrtoint (i32* getelementptr inbounds ({ [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local, i32 0, i32 1, i32 2) to i64)) to i32)] }, align 4 |
| |
| // CHECK: @_ZTV1C ={{.*}} unnamed_addr alias { [4 x i32], [3 x i32] }, { [4 x i32], [3 x i32] }* @_ZTV1C.local |
| |
| // CHECK: define{{.*}} void @_Z8C_foobarP1C(%class.C* %c) local_unnamed_addr |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: [[c:%[0-9]+]] = bitcast %class.C* %c to i8** |
| // CHECK-NEXT: [[vtable:%[a-z0-9]+]] = load i8*, i8** [[c]], align 8 |
| |
| // Offset 0 to get first method |
| // CHECK-NEXT: [[ptr1:%[0-9]+]] = call i8* @llvm.load.relative.i32(i8* [[vtable]], i32 0) |
| // CHECK-NEXT: [[method1:%[0-9]+]] = bitcast i8* [[ptr1]] to void (%class.C*)* |
| // CHECK-NEXT: call void [[method1]](%class.C* {{[^,]*}} %c) |
| // CHECK-NEXT: [[vtable:%[a-z0-9]+]] = load i8*, i8** [[c]], align 8 |
| |
| // Offset by 4 to get the next bar() |
| // CHECK-NEXT: [[ptr2:%[0-9]+]] = call i8* @llvm.load.relative.i32(i8* [[vtable]], i32 4) |
| // CHECK-NEXT: [[method2:%[0-9]+]] = bitcast i8* [[ptr2]] to void (%class.C*)* |
| // CHECK-NEXT: call void [[method2]](%class.C* {{[^,]*}} %c) |
| // CHECK-NEXT: ret void |
| // CHECK-NEXT: } |
| |
| class A { |
| public: |
| virtual void foo(); |
| }; |
| |
| class B { |
| virtual void bar(); |
| }; |
| |
| class C : public A, public B { |
| public: |
| void foo() override; |
| void bar() override; |
| }; |
| |
| void C::foo() {} |
| void C::bar() {} |
| |
| void C_foobar(C *c) { |
| c->foo(); |
| c->bar(); |
| } |