forked from OSchip/llvm-project
216 lines
8.6 KiB
C++
216 lines
8.6 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -cxx-abi microsoft -triple=i386-pc-win32 -fno-rtti > %t 2>&1
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// RUN: FileCheck %s < %t
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// Using a different check prefix as the inline destructors might be placed
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// anywhere in the output.
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// RUN: FileCheck --check-prefix=DTORS %s < %t
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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"* %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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// 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"* %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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// Complete destructor first:
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// DTORS: define {{.*}} x86_thiscallcc void @"\01??1C@basic@@UAE@XZ"(%"struct.basic::C"* %this)
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// Then, the scalar deleting destructor (used in the vtable):
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// FIXME: add a test that verifies that the out-of-line scalar deleting
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// destructor is linkonce_odr too.
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// DTORS: define linkonce_odr x86_thiscallcc void @"\01??_GC@basic@@UAEPAXI@Z"(%"struct.basic::C"* %this, i1 zeroext %should_call_delete)
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// DTORS: %[[FROMBOOL:[0-9a-z]+]] = zext i1 %should_call_delete to i8
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// DTORS-NEXT: store i8 %[[FROMBOOL]], i8* %[[SHOULD_DELETE_VAR:[0-9a-z._]+]], align 1
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// DTORS: %[[SHOULD_DELETE_VALUE:[0-9a-z._]+]] = load i8* %[[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 i8 %[[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]]) [[NUW:#[0-9]+]]
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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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}
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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 i8***
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// CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7C@basic@@6B@", i64 0, i64 0), 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"*, i1)***
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// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]]
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// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0
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// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]]
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// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext false)
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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"*, i1)***
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// CHECK-NEXT: %[[VTABLE:.*]] = load void (%"struct.basic::C"*, i1)*** %[[PVTABLE]]
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// CHECK-NEXT: %[[PVDTOR:.*]] = getelementptr inbounds void (%"struct.basic::C"*, i1)** %[[VTABLE]], i64 0
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// CHECK-NEXT: %[[VDTOR:.*]] = load void (%"struct.basic::C"*, i1)** %[[PVDTOR]]
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// CHECK-NEXT: call x86_thiscallcc void %[[VDTOR]](%"struct.basic::C"* %[[OBJ_PTR_VALUE]], i1 zeroext true)
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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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// DTORS: attributes [[NUW]] = { nounwind{{.*}} }
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} // end namespace basic
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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"* %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"* %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: bitcast %"struct.constructors::C"* %{{.*}} 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: @"\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"* %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: bitcast %"struct.constructors::D"* %{{.*}} 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"* %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: bitcast %"struct.constructors::E"* %{{.*}} 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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} // end namespace constructors
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