forked from OSchip/llvm-project
423 lines
16 KiB
C++
423 lines
16 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 -fno-rtti > %t
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// RUN: FileCheck %s < %t
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// vftables are emitted very late, so do another pass to try to keep the checks
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// in source order.
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// RUN: FileCheck --check-prefix DTORS %s < %t
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// RUN: FileCheck --check-prefix DTORS2 %s < %t
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// RUN: FileCheck --check-prefix DTORS3 %s < %t
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//
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// RUN: %clang_cc1 -emit-llvm %s -o - -mconstructor-aliases -triple=x86_64-pc-win32 -fno-rtti | FileCheck --check-prefix DTORS-X64 %s
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namespace basic {
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class A {
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public:
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A() { }
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~A();
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};
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void no_constructor_destructor_infinite_recursion() {
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A a;
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// CHECK: define linkonce_odr x86_thiscallcc %"class.basic::A"* @"\01??0A@basic@@QAE@XZ"(%"class.basic::A"* returned %this)
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// CHECK: [[THIS_ADDR:%[.0-9A-Z_a-z]+]] = alloca %"class.basic::A"*, align 4
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// CHECK-NEXT: store %"class.basic::A"* %this, %"class.basic::A"** [[THIS_ADDR]], align 4
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// CHECK-NEXT: [[T1:%[.0-9A-Z_a-z]+]] = load %"class.basic::A"** [[THIS_ADDR]]
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// CHECK-NEXT: ret %"class.basic::A"* [[T1]]
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// CHECK-NEXT: }
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}
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A::~A() {
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// Make sure that the destructor doesn't call itself:
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// CHECK: define {{.*}} @"\01??1A@basic@@QAE@XZ"
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// CHECK-NOT: call void @"\01??1A@basic@@QAE@XZ"
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// CHECK: ret
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}
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struct B {
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B();
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};
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// Tests that we can define constructors outside the class (PR12784).
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B::B() {
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// CHECK: define x86_thiscallcc %"struct.basic::B"* @"\01??0B@basic@@QAE@XZ"(%"struct.basic::B"* returned %this)
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// CHECK: ret
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}
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struct C {
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virtual ~C() {
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// DTORS: define linkonce_odr x86_thiscallcc void @"\01??_GC@basic@@UAEPAXI@Z"(%"struct.basic::C"* %this, i32 %should_call_delete)
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// DTORS: store i32 %should_call_delete, i32* %[[SHOULD_DELETE_VAR:[0-9a-z._]+]], align 4
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// DTORS: %[[SHOULD_DELETE_VALUE:[0-9a-z._]+]] = load i32* %[[SHOULD_DELETE_VAR]]
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// DTORS: call x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %[[THIS:[0-9a-z]+]])
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// DTORS-NEXT: %[[CONDITION:[0-9]+]] = icmp eq i32 %[[SHOULD_DELETE_VALUE]], 0
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// DTORS-NEXT: br i1 %[[CONDITION]], label %[[CONTINUE_LABEL:[0-9a-z._]+]], label %[[CALL_DELETE_LABEL:[0-9a-z._]+]]
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//
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// DTORS: [[CALL_DELETE_LABEL]]
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// DTORS-NEXT: %[[THIS_AS_VOID:[0-9a-z]+]] = bitcast %"struct.basic::C"* %[[THIS]] to i8*
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// DTORS-NEXT: call void @"\01??3@YAXPAX@Z"(i8* %[[THIS_AS_VOID]])
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// DTORS-NEXT: br label %[[CONTINUE_LABEL]]
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//
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// DTORS: [[CONTINUE_LABEL]]
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// DTORS-NEXT: ret void
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// Check that we do the mangling correctly on x64.
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// DTORS-X64: @"\01??_GC@basic@@UEAAPEAXI@Z"
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}
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virtual void foo();
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};
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// Emits the vftable in the output.
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void C::foo() {}
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void check_vftable_offset() {
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C c;
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// The vftable pointer should point at the beginning of the vftable.
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// CHECK: [[THIS_PTR:%[0-9]+]] = bitcast %"struct.basic::C"* {{.*}} to [2 x i8*]**
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// CHECK: store [2 x i8*]* @"\01??_7C@basic@@6B@", [2 x i8*]** [[THIS_PTR]]
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}
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void call_complete_dtor(C *obj_ptr) {
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// CHECK: define void @"\01?call_complete_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr)
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obj_ptr->~C();
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// CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4
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// CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i32)***
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// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i32)*** %[[PVTABLE]]
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// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i32)** %[[VTABLE]], i64 0
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// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i32)** %[[PVDTOR]]
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// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i32 0)
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// CHECK-NEXT: ret void
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}
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void call_deleting_dtor(C *obj_ptr) {
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// CHECK: define void @"\01?call_deleting_dtor@basic@@YAXPAUC@1@@Z"(%"struct.basic::C"* %obj_ptr)
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delete obj_ptr;
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// CHECK: %[[OBJ_PTR_VALUE:.*]] = load %"struct.basic::C"** %{{.*}}, align 4
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// CHECK: br i1 {{.*}}, label %[[DELETE_NULL:.*]], label %[[DELETE_NOTNULL:.*]]
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// CHECK: [[DELETE_NOTNULL]]
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// CHECK-NEXT: %[[PVTABLE:.*]] = bitcast %"struct.basic::C"* %[[OBJ_PTR_VALUE]] to void (%"struct.basic::C"*, i32)***
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// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i32)*** %[[PVTABLE]]
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// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i32)** %[[VTABLE]], i64 0
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// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i32)** %[[PVDTOR]]
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// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i32 1)
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// CHECK: ret void
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}
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struct D {
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static int foo();
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D() {
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static int ctor_static = foo();
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// CHECK that the static in the ctor gets mangled correctly:
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// CHECK: @"\01?ctor_static@?1???0D@basic@@QAE@XZ@4HA"
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}
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~D() {
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static int dtor_static = foo();
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// CHECK that the static in the dtor gets mangled correctly:
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// CHECK: @"\01?dtor_static@?1???1D@basic@@QAE@XZ@4HA"
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}
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};
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void use_D() { D c; }
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} // end namespace basic
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namespace dtor_in_second_nvbase {
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struct A {
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virtual void f(); // A needs vftable to be primary.
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};
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struct B {
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virtual ~B();
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};
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struct C : A, B {
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virtual ~C();
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};
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C::~C() {
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// CHECK-LABEL: define x86_thiscallcc void @"\01??1C@dtor_in_second_nvbase@@UAE@XZ"
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// CHECK: (%"struct.dtor_in_second_nvbase::C"* %this)
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// No this adjustment!
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// CHECK-NOT: getelementptr
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// CHECK: load %"struct.dtor_in_second_nvbase::C"** %{{.*}}
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// Now we this-adjust before calling ~B.
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// CHECK: bitcast %"struct.dtor_in_second_nvbase::C"* %{{.*}} to i8*
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// CHECK: getelementptr inbounds i8* %{{.*}}, i64 4
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// CHECK: bitcast i8* %{{.*}} to %"struct.dtor_in_second_nvbase::B"*
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// CHECK: call x86_thiscallcc void @"\01??1B@dtor_in_second_nvbase@@UAE@XZ"
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// CHECK: (%"struct.dtor_in_second_nvbase::B"* %{{.*}})
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// CHECK: ret void
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}
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void foo() {
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C c;
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}
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// DTORS2-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_EC@dtor_in_second_nvbase@@W3AEPAXI@Z"
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// DTORS2: (%"struct.dtor_in_second_nvbase::C"* %this, i32 %should_call_delete)
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// Do an adjustment from B* to C*.
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// DTORS2: getelementptr i8* %{{.*}}, i32 -4
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// DTORS2: bitcast i8* %{{.*}} to %"struct.dtor_in_second_nvbase::C"*
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// DTORS2: call x86_thiscallcc void @"\01??_GC@dtor_in_second_nvbase@@UAEPAXI@Z"
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// DTORS2: ret void
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}
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namespace test2 {
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// Just like dtor_in_second_nvbase, except put that in a vbase of a diamond.
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// C's dtor is in the non-primary base.
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struct A { virtual void f(); };
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struct B { virtual ~B(); };
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struct C : A, B { virtual ~C(); int c; };
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// Diamond hierarchy, with C as the shared vbase.
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struct D : virtual C { int d; };
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struct E : virtual C { int e; };
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struct F : D, E { ~F(); int f; };
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F::~F() {
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// CHECK-LABEL: define x86_thiscallcc void @"\01??1F@test2@@UAE@XZ"(%"struct.test2::F"*)
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// Do an adjustment from C vbase subobject to F as though F was the
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// complete type.
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// CHECK: getelementptr inbounds i8* %{{.*}}, i32 -20
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// CHECK: bitcast i8* %{{.*}} to %"struct.test2::F"*
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// CHECK: store %"struct.test2::F"*
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}
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void foo() {
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F f;
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}
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// DTORS3-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_DF@test2@@UAE@XZ"
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// Do an adjustment from C* to F*.
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// DTORS3: getelementptr i8* %{{.*}}, i32 20
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// DTORS3: bitcast i8* %{{.*}} to %"struct.test2::F"*
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// DTORS3: call x86_thiscallcc void @"\01??1F@test2@@UAE@XZ"
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// DTORS3: ret void
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}
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namespace constructors {
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struct A {
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A() {}
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};
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struct B : A {
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B();
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~B();
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};
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B::B() {
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// CHECK: define x86_thiscallcc %"struct.constructors::B"* @"\01??0B@constructors@@QAE@XZ"(%"struct.constructors::B"* returned %this)
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// CHECK: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}})
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// CHECK: ret
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}
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struct C : virtual A {
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C();
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};
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C::C() {
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// CHECK: define x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* returned %this, i32 %is_most_derived)
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// TODO: make sure this works in the Release build too;
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// CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4
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// CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]]
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// CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
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// CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
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//
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// CHECK: [[INIT_VBASES]]
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// CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::C"* %{{.*}} to i8*
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// CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0
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// CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]**
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// CHECK-NEXT: store [2 x i32]* @"\01??_8C@constructors@@7B@", [2 x i32]** %[[vbptr]]
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// CHECK-NEXT: bitcast %"struct.constructors::C"* %{{.*}} to i8*
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// CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4
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// CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"*
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// CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}})
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// CHECK-NEXT: br label %[[SKIP_VBASES]]
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//
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// CHECK: [[SKIP_VBASES]]
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// Class C does not define or override methods, so shouldn't change the vfptr.
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// CHECK-NOT: @"\01??_7C@constructors@@6B@"
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// CHECK: ret
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}
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void create_C() {
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C c;
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// CHECK: define void @"\01?create_C@constructors@@YAXXZ"()
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// CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %c, i32 1)
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// CHECK: ret
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}
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struct D : C {
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D();
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};
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D::D() {
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// CHECK: define x86_thiscallcc %"struct.constructors::D"* @"\01??0D@constructors@@QAE@XZ"(%"struct.constructors::D"* returned %this, i32 %is_most_derived) unnamed_addr
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// CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4
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// CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]]
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// CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
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// CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
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//
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// CHECK: [[INIT_VBASES]]
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// CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::D"* %{{.*}} to i8*
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// CHECK-NEXT: %[[vbptr_off:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0
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// CHECK-NEXT: %[[vbptr:.*]] = bitcast i8* %[[vbptr_off]] to [2 x i32]**
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// CHECK-NEXT: store [2 x i32]* @"\01??_8D@constructors@@7B@", [2 x i32]** %[[vbptr]]
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// CHECK-NEXT: bitcast %"struct.constructors::D"* %{{.*}} to i8*
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// CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4
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// CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"*
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// CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}})
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// CHECK-NEXT: br label %[[SKIP_VBASES]]
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//
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// CHECK: [[SKIP_VBASES]]
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// CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0)
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// CHECK: ret
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}
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struct E : virtual C {
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E();
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};
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E::E() {
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// CHECK: define x86_thiscallcc %"struct.constructors::E"* @"\01??0E@constructors@@QAE@XZ"(%"struct.constructors::E"* returned %this, i32 %is_most_derived) unnamed_addr
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// CHECK: store i32 %is_most_derived, i32* %[[IS_MOST_DERIVED_VAR:.*]], align 4
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// CHECK: %[[IS_MOST_DERIVED_VAL:.*]] = load i32* %[[IS_MOST_DERIVED_VAR]]
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// CHECK: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
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// CHECK: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
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//
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// CHECK: [[INIT_VBASES]]
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// CHECK-NEXT: %[[this_i8:.*]] = bitcast %"struct.constructors::E"* %{{.*}} to i8*
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// CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 0
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// CHECK-NEXT: %[[vbptr_E:.*]] = bitcast i8* %[[offs]] to [3 x i32]**
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// CHECK-NEXT: store [3 x i32]* @"\01??_8E@constructors@@7B01@@", [3 x i32]** %[[vbptr_E]]
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// CHECK-NEXT: %[[offs:.*]] = getelementptr inbounds i8* %[[this_i8]], i64 4
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// CHECK-NEXT: %[[vbptr_C:.*]] = bitcast i8* %[[offs]] to [2 x i32]**
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// CHECK-NEXT: store [2 x i32]* @"\01??_8E@constructors@@7BC@1@@", [2 x i32]** %[[vbptr_C]]
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// CHECK-NEXT: bitcast %"struct.constructors::E"* %{{.*}} to i8*
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// CHECK-NEXT: getelementptr inbounds i8* %{{.*}}, i64 4
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// CHECK-NEXT: bitcast i8* %{{.*}} to %"struct.constructors::A"*
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// CHECK-NEXT: call x86_thiscallcc %"struct.constructors::A"* @"\01??0A@constructors@@QAE@XZ"(%"struct.constructors::A"* %{{.*}})
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// CHECK: call x86_thiscallcc %"struct.constructors::C"* @"\01??0C@constructors@@QAE@XZ"(%"struct.constructors::C"* %{{.*}}, i32 0)
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// CHECK-NEXT: br label %[[SKIP_VBASES]]
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//
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// CHECK: [[SKIP_VBASES]]
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// CHECK: ret
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}
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// PR16735 - even abstract classes should have a constructor emitted.
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struct F {
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F();
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virtual void f() = 0;
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};
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F::F() {}
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// CHECK: define x86_thiscallcc %"struct.constructors::F"* @"\01??0F@constructors@@QAE@XZ"
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} // end namespace constructors
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namespace dtors {
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struct A {
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~A();
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};
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void call_nv_complete(A *a) {
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a->~A();
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// CHECK: define void @"\01?call_nv_complete@dtors@@YAXPAUA@1@@Z"
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// CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ"
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// CHECK: ret
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}
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// CHECK: declare x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ"
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// Now try some virtual bases, where we need the complete dtor.
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struct B : virtual A { ~B(); };
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struct C : virtual A { ~C(); };
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struct D : B, C { ~D(); };
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void call_vbase_complete(D *d) {
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d->~D();
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// CHECK: define void @"\01?call_vbase_complete@dtors@@YAXPAUD@1@@Z"
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// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}})
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// CHECK: ret
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}
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// The complete dtor should call the base dtors for D and the vbase A (once).
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// CHECK: define linkonce_odr x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"
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// CHECK-NOT: call
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// CHECK: call x86_thiscallcc void @"\01??1D@dtors@@QAE@XZ"
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// CHECK-NOT: call
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// CHECK: call x86_thiscallcc void @"\01??1A@dtors@@QAE@XZ"
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// CHECK-NOT: call
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// CHECK: ret
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void destroy_d_complete() {
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D d;
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// CHECK: define void @"\01?destroy_d_complete@dtors@@YAXXZ"
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// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}})
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// CHECK: ret
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}
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|
|
|
// FIXME: Clang manually inlines the deletion, so we don't get a call to the
|
|
// deleting dtor (_G). The only way to call deleting dtors currently is through
|
|
// a vftable.
|
|
void call_nv_deleting_dtor(D *d) {
|
|
delete d;
|
|
// CHECK: define void @"\01?call_nv_deleting_dtor@dtors@@YAXPAUD@1@@Z"
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// CHECK: call x86_thiscallcc void @"\01??_DD@dtors@@QAE@XZ"(%"struct.dtors::D"* %{{[^,]+}})
|
|
// CHECK: call void @"\01??3@YAXPAX@Z"
|
|
// CHECK: ret
|
|
}
|
|
|
|
}
|
|
|
|
namespace test1 {
|
|
struct A { };
|
|
struct B : virtual A {
|
|
B(int *a);
|
|
B(const char *a, ...);
|
|
__cdecl B(short *a);
|
|
};
|
|
B::B(int *a) {}
|
|
B::B(const char *a, ...) {}
|
|
B::B(short *a) {}
|
|
// CHECK: define x86_thiscallcc %"struct.test1::B"* @"\01??0B@test1@@QAE@PAH@Z"
|
|
// CHECK: (%"struct.test1::B"* returned %this, i32* %a, i32 %is_most_derived)
|
|
// CHECK: define %"struct.test1::B"* @"\01??0B@test1@@QAA@PBDZZ"
|
|
// CHECK: (%"struct.test1::B"* returned %this, i32 %is_most_derived, i8* %a, ...)
|
|
|
|
// FIXME: This should be x86_thiscallcc. MSVC ignores explicit CCs on structors.
|
|
// CHECK: define %"struct.test1::B"* @"\01??0B@test1@@QAA@PAF@Z"
|
|
// CHECK: (%"struct.test1::B"* returned %this, i16* %a, i32 %is_most_derived)
|
|
|
|
void construct_b() {
|
|
int a;
|
|
B b1(&a);
|
|
B b2("%d %d", 1, 2);
|
|
}
|
|
// CHECK-LABEL: define void @"\01?construct_b@test1@@YAXXZ"()
|
|
// CHECK: call x86_thiscallcc %"struct.test1::B"* @"\01??0B@test1@@QAE@PAH@Z"
|
|
// CHECK: (%"struct.test1::B"* {{.*}}, i32* {{.*}}, i32 1)
|
|
// CHECK: call %"struct.test1::B"* (%"struct.test1::B"*, i32, i8*, ...)* @"\01??0B@test1@@QAA@PBDZZ"
|
|
// CHECK: (%"struct.test1::B"* {{.*}}, i32 1, i8* {{.*}}, i32 1, i32 2)
|
|
}
|
|
|
|
// Dtor thunks for classes in anonymous namespaces should be internal, not
|
|
// linkonce_odr.
|
|
namespace {
|
|
struct A {
|
|
virtual ~A() { }
|
|
};
|
|
}
|
|
void *getA() {
|
|
return (void*)new A();
|
|
}
|
|
// CHECK: define internal x86_thiscallcc void @"\01??_GA@?A@@UAEPAXI@Z"
|
|
// CHECK: (%"struct.(anonymous namespace)::A"* %this, i32 %should_call_delete)
|
|
// CHECK: define internal x86_thiscallcc void @"\01??1A@?A@@UAE@XZ"
|
|
// CHECK: (%"struct.(anonymous namespace)::A"* %this)
|