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