forked from OSchip/llvm-project
93 lines
3.1 KiB
C++
93 lines
3.1 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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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.A* @"\01??0A@@QAE@XZ"(%class.A* %this)
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// CHECK: [[THIS_ADDR:%[.0-9A-Z_a-z]+]] = alloca %class.A*, align 4
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// CHECK-NEXT: store %class.A* %this, %class.A** [[THIS_ADDR]], align 4
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// CHECK-NEXT: [[T1:%[.0-9A-Z_a-z]+]] = load %class.A** [[THIS_ADDR]]
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// CHECK-NEXT: ret %class.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@@QAE@XZ"
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// CHECK-NOT: call void @"\01??1A@@QAE@XZ"
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// CHECK: ret
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}
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struct B {
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virtual ~B() {
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// Complete destructor first:
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// DTORS: define {{.*}} x86_thiscallcc void @"\01??1B@@UAE@XZ"(%struct.B* %this)
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// Then, the scalar deleting destructor (used in the vtable):
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// DTORS: define {{.*}} x86_thiscallcc void @"\01??_GB@@UAEPAXI@Z"(%struct.B* %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??1B@@UAE@XZ"(%struct.B* %[[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.B* %[[THIS]] to i8*
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// DTORS-NEXT: call void @"\01??3@YAXPAX@Z"(i8* %[[THIS_AS_VOID]]) nounwind
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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 B::foo() {}
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void check_vftable_offset() {
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B b;
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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.B* {{.*}} to i8***
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// CHECK: store i8** getelementptr inbounds ([2 x i8*]* @"\01??_7B@@6B@", i64 0, i64 0), i8*** [[THIS_PTR]]
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}
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// FIXME: Enable the following block and add expectations when calls
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// to virtual complete dtor are supported.
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#if 0
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void call_complete_dtor(B *obj_ptr) {
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obj_ptr->~B();
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}
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#endif
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void call_deleting_dtor(B *obj_ptr) {
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// FIXME: Add CHECKs when calls to virtual deleting dtor are generated properly.
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delete obj_ptr;
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}
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struct C {
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static int foo();
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C() {
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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???0C@@QAE@XZ@4HA"
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}
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~C() {
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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???1C@@QAE@XZ@4HA"
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}
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};
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void use_C() { C c; }
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