| // Member pointer to virtual function. |
| |
| // RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O3 -S -o - -emit-llvm | FileCheck %s |
| |
| // CHECK: define{{.*}} void @_Z4funcP1AMS_FvvE(%class.A* %a, [2 x i64] %fn.coerce) local_unnamed_addr |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: [[fn_ptr:%.+]] = extractvalue [2 x i64] %fn.coerce, 0 |
| // CHECK-NEXT: [[adjust:%.+]] = extractvalue [2 x i64] %fn.coerce, 1 |
| // CHECK-NEXT: [[this:%.+]] = bitcast %class.A* %a to i8* |
| // CHECK-NEXT: [[this_adj:%.+]] = getelementptr inbounds i8, i8* [[this]], i64 [[adjust]] |
| // CHECK-NEXT: [[virtbit:%.+]] = and i64 [[fn_ptr]], 1 |
| // CHECK-NEXT: [[isvirt:%.+]] = icmp eq i64 [[virtbit]], 0 |
| // CHECK-NEXT: br i1 [[isvirt]], label %[[nonvirt:.+]], label %[[virt:.+]] |
| // CHECK: [[virt]]: |
| |
| // The loading of the virtual function here should be replaced with a llvm.load.relative() call. |
| // CHECK-NEXT: [[this:%.+]] = bitcast i8* [[this_adj]] to i8** |
| // CHECK-NEXT: [[vtable:%.+]] = load i8*, i8** [[this]], align 8 |
| // CHECK-NEXT: [[offset:%.+]] = add i64 [[fn_ptr]], -1 |
| // CHECK-NEXT: [[ptr:%.+]] = tail call i8* @llvm.load.relative.i64(i8* [[vtable]], i64 [[offset]]) |
| // CHECK-NEXT: [[method:%.+]] = bitcast i8* [[ptr]] to void (%class.A*)* |
| // CHECK-NEXT: br label %[[memptr_end:.+]] |
| // CHECK: [[nonvirt]]: |
| // CHECK-NEXT: [[method2:%.+]] = inttoptr i64 [[fn_ptr]] to void (%class.A*)* |
| // CHECK-NEXT: br label %[[memptr_end]] |
| // CHECK: [[memptr_end]]: |
| // CHECK-NEXT: [[method3:%.+]] = phi void (%class.A*)* [ [[method]], %[[virt]] ], [ [[method2]], %[[nonvirt]] ] |
| // CHECK-NEXT: [[a:%.+]] = bitcast i8* [[this_adj]] to %class.A* |
| // CHECK-NEXT: tail call void [[method3]](%class.A* {{[^,]*}} [[a]]) |
| // CHECK-NEXT: ret void |
| // CHECK-NEXT: } |
| |
| class A { |
| public: |
| virtual void foo(); |
| }; |
| |
| class B : public A { |
| public: |
| void foo() override; |
| }; |
| |
| typedef void (A::*A_foo)(); |
| |
| void func(A *a, A_foo fn) { |
| (a->*fn)(); |
| } |