forked from OSchip/llvm-project
202 lines
7.9 KiB
C++
202 lines
7.9 KiB
C++
// RUN: %clang_cc1 -fno-rtti -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 | FileCheck %s
|
|
|
|
struct Left {
|
|
virtual void left();
|
|
};
|
|
|
|
struct Right {
|
|
virtual void right();
|
|
};
|
|
|
|
struct ChildNoOverride : Left, Right {
|
|
};
|
|
|
|
struct ChildOverride : Left, Right {
|
|
virtual void left();
|
|
virtual void right();
|
|
};
|
|
|
|
extern "C" void foo(void *);
|
|
|
|
void call_left_no_override(ChildNoOverride *child) {
|
|
// CHECK: define void @"\01?call_left_no_override
|
|
// CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride
|
|
|
|
child->left();
|
|
// Only need to cast 'this' to Left*.
|
|
// CHECK: %[[LEFT:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to %struct.Left*
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.Left* %[[LEFT]] to void (%struct.Left*)***
|
|
// CHECK: %[[VFTABLE:.*]] = load void (%struct.Left*)*** %[[VFPTR]]
|
|
// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Left*)** %[[VFTABLE]], i64 0
|
|
// CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.Left*)** %[[VFUN]]
|
|
// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.Left* %[[LEFT]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void ChildOverride::left() {
|
|
// CHECK: define x86_thiscallcc void @"\01?left@ChildOverride@@UAEXXZ"(%struct.ChildOverride* %[[THIS:.*]])
|
|
//
|
|
// No need to adjust 'this' as the ChildOverride's layout begins with Left.
|
|
// CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4
|
|
// CHECK: store %struct.ChildOverride* %[[THIS]], %struct.ChildOverride** %[[THIS_ADDR]], align 4
|
|
|
|
foo(this);
|
|
// CHECK: %[[THIS:.*]] = load %struct.ChildOverride** %[[THIS_ADDR]]
|
|
// CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8*
|
|
// CHECK: call void @foo(i8* %[[THIS_i8]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void call_left_override(ChildOverride *child) {
|
|
// CHECK: define void @"\01?call_left_override
|
|
// CHECK: %[[CHILD:.*]] = load %struct.ChildOverride
|
|
|
|
child->left();
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to void (%struct.ChildOverride*)***
|
|
// CHECK: %[[VFTABLE:.*]] = load void (%struct.ChildOverride*)*** %[[VFPTR]]
|
|
// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.ChildOverride*)** %[[VFTABLE]], i64 0
|
|
// CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.ChildOverride*)** %[[VFUN]]
|
|
//
|
|
// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.ChildOverride* %[[CHILD]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void call_right_no_override(ChildNoOverride *child) {
|
|
// CHECK: define void @"\01?call_right_no_override
|
|
// CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride
|
|
|
|
child->right();
|
|
// When calling a right base's virtual method, one needs to adjust 'this' at
|
|
// the caller site.
|
|
//
|
|
// CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to i8*
|
|
// CHECK: %[[RIGHT_i8:.*]] = getelementptr inbounds i8* %[[CHILD_i8]], i32 4
|
|
// CHECK: %[[RIGHT:.*]] = bitcast i8* %[[RIGHT_i8]] to %struct.Right*
|
|
//
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.Right* %[[RIGHT]] to void (%struct.Right*)***
|
|
// CHECK: %[[VFTABLE:.*]] = load void (%struct.Right*)*** %[[VFPTR]]
|
|
// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Right*)** %[[VFTABLE]], i64 0
|
|
// CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.Right*)** %[[VFUN]]
|
|
// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.Right* %[[RIGHT]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void ChildOverride::right() {
|
|
// CHECK: define x86_thiscallcc void @"\01?right@ChildOverride@@UAEXXZ"(i8*
|
|
//
|
|
// ChildOverride::right gets 'this' cast to Right* in ECX (i.e. this+4) so we
|
|
// need to adjust 'this' before use.
|
|
//
|
|
// CHECK: %[[THIS_ADDR:.*]] = alloca %struct.ChildOverride*, align 4
|
|
// CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[ECX:.*]], i32 -4
|
|
// CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.ChildOverride*
|
|
// CHECK: store %struct.ChildOverride* %[[THIS]], %struct.ChildOverride** %[[THIS_ADDR]], align 4
|
|
|
|
foo(this);
|
|
// CHECK: %[[THIS:.*]] = load %struct.ChildOverride** %[[THIS_ADDR]]
|
|
// CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8*
|
|
// CHECK: call void @foo(i8* %[[THIS_PARAM]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void call_right_override(ChildOverride *child) {
|
|
// CHECK: define void @"\01?call_right_override
|
|
// CHECK: %[[CHILD:.*]] = load %struct.ChildOverride
|
|
|
|
child->right();
|
|
// When calling a right child's virtual method, one needs to adjust 'this' at
|
|
// the caller site.
|
|
//
|
|
// CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8*
|
|
//
|
|
// CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8* %[[CHILD_i8]], i32 4
|
|
// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to void (i8*)***
|
|
// CHECK: %[[VFTABLE:.*]] = load void (i8*)*** %[[VFPTR]]
|
|
// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (i8*)** %[[VFTABLE]], i64 0
|
|
// CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)** %[[VFUN]]
|
|
//
|
|
// CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildOverride* %[[CHILD]] to i8*
|
|
// CHECK: %[[RIGHT:.*]] = getelementptr inbounds i8* %[[CHILD_i8]], i32 4
|
|
//
|
|
// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[RIGHT]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
struct GrandchildOverride : ChildOverride {
|
|
virtual void right();
|
|
};
|
|
|
|
void GrandchildOverride::right() {
|
|
// CHECK: define x86_thiscallcc void @"\01?right@GrandchildOverride@@UAEXXZ"(i8*
|
|
//
|
|
// CHECK: %[[THIS_ADDR:.*]] = alloca %struct.GrandchildOverride*, align 4
|
|
// CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[ECX:.*]], i32 -4
|
|
// CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.GrandchildOverride*
|
|
// CHECK: store %struct.GrandchildOverride* %[[THIS]], %struct.GrandchildOverride** %[[THIS_ADDR]], align 4
|
|
|
|
foo(this);
|
|
// CHECK: %[[THIS:.*]] = load %struct.GrandchildOverride** %[[THIS_ADDR]]
|
|
// CHECK: %[[THIS_PARAM:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8*
|
|
// CHECK: call void @foo(i8* %[[THIS_PARAM]])
|
|
// CHECK: ret
|
|
}
|
|
|
|
void call_grandchild_right(GrandchildOverride *obj) {
|
|
// Just make sure we don't crash.
|
|
obj->right();
|
|
}
|
|
|
|
void emit_ctors() {
|
|
Left l;
|
|
// CHECK: define {{.*}} @"\01??0Left@@QAE@XZ"
|
|
// CHECK-NOT: getelementptr
|
|
// CHECK: store [1 x i8*]* @"\01??_7Left@@6B@"
|
|
// CHECK: ret
|
|
|
|
Right r;
|
|
// CHECK: define {{.*}} @"\01??0Right@@QAE@XZ"
|
|
// CHECK-NOT: getelementptr
|
|
// CHECK: store [1 x i8*]* @"\01??_7Right@@6B@"
|
|
// CHECK: ret
|
|
|
|
ChildOverride co;
|
|
// CHECK: define {{.*}} @"\01??0ChildOverride@@QAE@XZ"
|
|
// CHECK: %[[THIS:.*]] = load %struct.ChildOverride**
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to [1 x i8*]**
|
|
// CHECK: store [1 x i8*]* @"\01??_7ChildOverride@@6BLeft@@@", [1 x i8*]** %[[VFPTR]]
|
|
// CHECK: %[[THIS_i8:.*]] = bitcast %struct.ChildOverride* %[[THIS]] to i8*
|
|
// CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 4
|
|
// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to [1 x i8*]**
|
|
// CHECK: store [1 x i8*]* @"\01??_7ChildOverride@@6BRight@@@", [1 x i8*]** %[[VFPTR]]
|
|
// CHECK: ret
|
|
|
|
GrandchildOverride gc;
|
|
// CHECK: define {{.*}} @"\01??0GrandchildOverride@@QAE@XZ"
|
|
// CHECK: %[[THIS:.*]] = load %struct.GrandchildOverride**
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to [1 x i8*]**
|
|
// CHECK: store [1 x i8*]* @"\01??_7GrandchildOverride@@6BLeft@@@", [1 x i8*]** %[[VFPTR]]
|
|
// CHECK: %[[THIS_i8:.*]] = bitcast %struct.GrandchildOverride* %[[THIS]] to i8*
|
|
// CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 4
|
|
// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to [1 x i8*]**
|
|
// CHECK: store [1 x i8*]* @"\01??_7GrandchildOverride@@6BRight@@@", [1 x i8*]** %[[VFPTR]]
|
|
// CHECK: ret
|
|
}
|
|
|
|
struct LeftWithNonVirtualDtor {
|
|
virtual void left();
|
|
~LeftWithNonVirtualDtor();
|
|
};
|
|
|
|
struct AsymmetricChild : LeftWithNonVirtualDtor, Right {
|
|
virtual ~AsymmetricChild();
|
|
};
|
|
|
|
void call_asymmetric_child_complete_dtor() {
|
|
// CHECK-LABEL: define void @"\01?call_asymmetric_child_complete_dtor@@YAXXZ"
|
|
AsymmetricChild obj;
|
|
// CHECK: call x86_thiscallcc %struct.AsymmetricChild* @"\01??0AsymmetricChild@@QAE@XZ"(%struct.AsymmetricChild* %[[OBJ:.*]])
|
|
// CHECK-NOT: getelementptr
|
|
// CHECK: call x86_thiscallcc void @"\01??1AsymmetricChild@@UAE@XZ"(%struct.AsymmetricChild* %[[OBJ]])
|
|
// CHECK: ret
|
|
}
|