315 lines
13 KiB
C++
315 lines
13 KiB
C++
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// RUN: %clang_cc1 %s -fno-rtti -cxx-abi microsoft -triple=i386-pc-win32 -emit-llvm -o %t
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// RUN: FileCheck %s < %t
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// RUN: FileCheck --check-prefix=CHECK2 %s < %t
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// For now, just make sure x86_64 doesn't crash.
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// RUN: %clang_cc1 %s -fno-rtti -cxx-abi microsoft -triple=x86_64-pc-win32 -emit-llvm -o %t
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struct VBase {
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virtual ~VBase();
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virtual void foo();
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virtual void bar();
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int field;
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};
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struct B : virtual VBase {
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B();
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virtual ~B();
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virtual void foo();
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virtual void bar();
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};
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B::B() {
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// CHECK-LABEL: define x86_thiscallcc %struct.B* @"\01??0B@@QAE@XZ"
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// CHECK: %[[THIS:.*]] = load %struct.B**
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// CHECK: br i1 %{{.*}}, label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
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// Don't check the INIT_VBASES case as it's covered by the ctor tests.
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// CHECK: %[[SKIP_VBASES]]
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 0
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// ...
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 %{{.*}}
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// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to [3 x i8*]**
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// CHECK: store [3 x i8*]* @"\01??_7B@@6B@", [3 x i8*]** %[[VFPTR]]
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// Initialize vtorDisp:
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 0
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// ...
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// CHECK: %[[VBASE_OFFSET:.*]] = add nsw i32 0, %{{.*}}
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// CHECK: %[[VTORDISP_VAL:.*]] = sub i32 %[[VBASE_OFFSET]], 8
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 %[[VBASE_OFFSET]]
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// CHECK: %[[VTORDISP_i8:.*]] = getelementptr i8* %[[VBASE_i8]], i32 -4
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// CHECK: %[[VTORDISP_PTR:.*]] = bitcast i8* %[[VTORDISP_i8]] to i32*
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// CHECK: store i32 %[[VTORDISP_VAL]], i32* %[[VTORDISP_PTR]]
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// CHECK: ret
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}
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B::~B() {
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// CHECK-LABEL: define x86_thiscallcc void @"\01??1B@@UAE@XZ"
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// Adjust the this parameter:
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// CHECK: %[[THIS_PARAM_i8:.*]] = bitcast %struct.B* {{.*}} to i8*
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// CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[THIS_PARAM_i8]], i32 -8
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// CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.B*
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// CHECK: store %struct.B* %[[THIS]], %struct.B** %[[THIS_ADDR:.*]], align 4
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// CHECK: %[[THIS:.*]] = load %struct.B** %[[THIS_ADDR]]
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// Restore the vfptr that could have been changed by a subclass.
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 0
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// ...
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VFPTR_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 %{{.*}}
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// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VFPTR_i8]] to [3 x i8*]**
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// CHECK: store [3 x i8*]* @"\01??_7B@@6B@", [3 x i8*]** %[[VFPTR]]
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// Initialize vtorDisp:
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 0
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// ...
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// CHECK: %[[VBASE_OFFSET:.*]] = add nsw i32 0, %{{.*}}
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// CHECK: %[[VTORDISP_VAL:.*]] = sub i32 %[[VBASE_OFFSET]], 8
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// CHECK: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i32 %[[VBASE_OFFSET]]
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// CHECK: %[[VTORDISP_i8:.*]] = getelementptr i8* %[[VBASE_i8]], i32 -4
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// CHECK: %[[VTORDISP_PTR:.*]] = bitcast i8* %[[VTORDISP_i8]] to i32*
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// CHECK: store i32 %[[VTORDISP_VAL]], i32* %[[VTORDISP_PTR]]
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foo(); // Avoid the "trivial destructor" optimization.
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// CHECK: ret
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// CHECK2-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_DB@@UAE@XZ"(%struct.B*
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// CHECK2: %[[THIS:.*]] = load %struct.B** {{.*}}
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// CHECK2: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK2: %[[B_i8:.*]] = getelementptr i8* %[[THIS_i8]], i32 8
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// CHECK2: %[[B:.*]] = bitcast i8* %[[B_i8]] to %struct.B*
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// CHECK2: call x86_thiscallcc void @"\01??1B@@UAE@XZ"(%struct.B* %[[B]])
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// CHECK2: %[[THIS_i8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK2: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[THIS_i8]], i64 8
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// CHECK2: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.VBase*
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// CHECK2: call x86_thiscallcc void @"\01??1VBase@@UAE@XZ"(%struct.VBase* %[[VBASE]])
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// CHECK2: ret
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// CHECK2-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_GB@@UAEPAXI@Z"
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// CHECK2: %[[THIS_PARAM_i8:.*]] = bitcast %struct.B* {{.*}} to i8*
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// CHECK2: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[THIS_PARAM_i8:.*]], i32 -8
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// CHECK2: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.B*
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// CHECK2: store %struct.B* %[[THIS]], %struct.B** %[[THIS_ADDR:.*]], align 4
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// CHECK2: %[[THIS:.*]] = load %struct.B** %[[THIS_ADDR]]
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// CHECK2: call x86_thiscallcc void @"\01??_DB@@UAE@XZ"(%struct.B* %[[THIS]])
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// ...
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// CHECK2: ret
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}
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void B::foo() {
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// CHECK-LABEL: define x86_thiscallcc void @"\01?foo@B@@UAEXXZ"(i8*
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//
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// B::foo gets 'this' cast to VBase* in ECX (i.e. this+8) so we
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// need to adjust 'this' before use.
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//
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// CHECK: %[[THIS_ADDR:.*]] = alloca %struct.B*, align 4
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// CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[ECX:.*]], i32 -8
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// CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %struct.B*
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// CHECK: store %struct.B* %[[THIS]], %struct.B** %[[THIS_ADDR]], align 4
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field = 42;
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// CHECK: %[[THIS:.*]] = load %struct.B** %[[THIS_ADDR]]
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// CHECK: %[[THIS8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[THIS8]], i32 0
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// CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i8**
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// CHECK: %[[VBTABLE:.*]] = load i8** %[[VBPTR8]]
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// CHECK: %[[VBENTRY8:.*]] = getelementptr inbounds i8* %[[VBTABLE]], i32 4
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// CHECK: %[[VBENTRY:.*]] = bitcast i8* %[[VBENTRY8]] to i32*
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// CHECK: %[[VBOFFSET32:.*]] = load i32* %[[VBENTRY]]
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// CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]]
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// CHECK: %[[THIS8:.*]] = bitcast %struct.B* %[[THIS]] to i8*
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[THIS8]], i32 %[[VBOFFSET]]
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// CHECK: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.VBase*
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// CHECK: %[[FIELD:.*]] = getelementptr inbounds %struct.VBase* %[[VBASE]], i32 0, i32 1
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// CHECK: store i32 42, i32* %[[FIELD]], align 4
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//
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// CHECK: ret void
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}
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void call_vbase_bar(B *obj) {
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// CHECK-LABEL: define void @"\01?call_vbase_bar@@YAXPAUB@@@Z"(%struct.B* %obj)
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// CHECK: %[[OBJ:.*]] = load %struct.B
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obj->bar();
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// When calling a vbase's virtual method, one needs to adjust 'this'
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// at the caller site.
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//
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// CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 0
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// CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i8**
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// CHECK: %[[VBTABLE:.*]] = load i8** %[[VBPTR8]]
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// CHECK: %[[VBENTRY8:.*]] = getelementptr inbounds i8* %[[VBTABLE]], i32 4
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// CHECK: %[[VBENTRY:.*]] = bitcast i8* %[[VBENTRY8]] to i32*
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// CHECK: %[[VBOFFSET32:.*]] = load i32* %[[VBENTRY]]
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// CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]]
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 %[[VBOFFSET]]
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// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VBASE_i8]] to void (i8*)***
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// CHECK: %[[VFTABLE:.*]] = load void (i8*)*** %[[VFPTR]]
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// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (i8*)** %[[VFTABLE]], i64 2
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// CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)** %[[VFUN]]
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//
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// CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 0
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// CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i8**
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// CHECK: %[[VBTABLE:.*]] = load i8** %[[VBPTR8]]
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// CHECK: %[[VBENTRY8:.*]] = getelementptr inbounds i8* %[[VBTABLE]], i32 4
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// CHECK: %[[VBENTRY:.*]] = bitcast i8* %[[VBENTRY8]] to i32*
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// CHECK: %[[VBOFFSET32:.*]] = load i32* %[[VBENTRY]]
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// CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]]
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// CHECK: %[[VBASE:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 %[[VBOFFSET]]
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//
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// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[VBASE]])
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//
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// CHECK: ret void
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}
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void delete_B(B *obj) {
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// CHECK-LABEL: define void @"\01?delete_B@@YAXPAUB@@@Z"(%struct.B* %obj)
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// CHECK: %[[OBJ:.*]] = load %struct.B
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delete obj;
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// CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 0
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// CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i8**
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// CHECK: %[[VBTABLE:.*]] = load i8** %[[VBPTR8]]
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// CHECK: %[[VBENTRY8:.*]] = getelementptr inbounds i8* %[[VBTABLE]], i32 4
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// CHECK: %[[VBENTRY:.*]] = bitcast i8* %[[VBENTRY8]] to i32*
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// CHECK: %[[VBOFFSET32:.*]] = load i32* %[[VBENTRY]]
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// CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]]
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 %[[VBOFFSET]]
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// CHECK: %[[VFPTR:.*]] = bitcast i8* %[[VBASE_i8]] to void (%struct.B*, i32)***
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// CHECK: %[[VFTABLE:.*]] = load void (%struct.B*, i32)*** %[[VFPTR]]
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// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.B*, i32)** %[[VFTABLE]], i64 0
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// CHECK: %[[VFUN_VALUE:.*]] = load void (%struct.B*, i32)** %[[VFUN]]
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//
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// CHECK: %[[OBJ_i8:.*]] = bitcast %struct.B* %[[OBJ]] to i8*
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// CHECK: %[[VBPTR:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 0
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// CHECK: %[[VBPTR8:.*]] = bitcast i8* %[[VBPTR]] to i8**
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// CHECK: %[[VBTABLE:.*]] = load i8** %[[VBPTR8]]
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// CHECK: %[[VBENTRY8:.*]] = getelementptr inbounds i8* %[[VBTABLE]], i32 4
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// CHECK: %[[VBENTRY:.*]] = bitcast i8* %[[VBENTRY8]] to i32*
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// CHECK: %[[VBOFFSET32:.*]] = load i32* %[[VBENTRY]]
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// CHECK: %[[VBOFFSET:.*]] = add nsw i32 0, %[[VBOFFSET32]]
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// CHECK: %[[VBASE_i8:.*]] = getelementptr inbounds i8* %[[OBJ_i8]], i32 %[[VBOFFSET]]
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// CHECK: %[[VBASE:.*]] = bitcast i8* %[[VBASE_i8]] to %struct.B*
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//
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// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](%struct.B* %[[VBASE]], i32 1)
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// CHECK: ret void
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}
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void call_complete_dtor() {
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// CHECK-LABEL: define void @"\01?call_complete_dtor@@YAXXZ"
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B b;
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// CHECK: call x86_thiscallcc %struct.B* @"\01??0B@@QAE@XZ"(%struct.B* %[[B:.*]], i32 1)
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// CHECK-NOT: getelementptr
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// CHECK: call x86_thiscallcc void @"\01??_DB@@UAE@XZ"(%struct.B* %[[B]])
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// CHECK: ret
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}
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struct C : B {
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C();
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// has an implicit vdtor.
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};
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// Used to crash on an assertion.
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C::C() {
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// CHECK-LABEL: define x86_thiscallcc %struct.C* @"\01??0C@@QAE@XZ"
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}
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namespace multiple_vbases {
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struct A {
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virtual void a();
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};
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struct B {
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virtual void b();
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};
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struct C {
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virtual void c();
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};
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struct D : virtual A, virtual B, virtual C {
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virtual void a();
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virtual void b();
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virtual void c();
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D();
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};
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D::D() {
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// CHECK-LABEL: define x86_thiscallcc %"struct.multiple_vbases::D"* @"\01??0D@multiple_vbases@@QAE@XZ"
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// Just make sure we emit 3 vtordisps after initializing vfptrs.
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// CHECK: store [1 x i8*]* @"\01??_7D@multiple_vbases@@6BA@1@@", [1 x i8*]** %{{.*}}
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// CHECK: store [1 x i8*]* @"\01??_7D@multiple_vbases@@6BB@1@@", [1 x i8*]** %{{.*}}
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// CHECK: store [1 x i8*]* @"\01??_7D@multiple_vbases@@6BC@1@@", [1 x i8*]** %{{.*}}
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// ...
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// CHECK: store i32 %{{.*}}, i32* %{{.*}}
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// CHECK: store i32 %{{.*}}, i32* %{{.*}}
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// CHECK: store i32 %{{.*}}, i32* %{{.*}}
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// CHECK: ret
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}
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}
|
||
|
|
|
||
|
|
namespace diamond {
|
||
|
|
struct A {
|
||
|
|
A();
|
||
|
|
virtual ~A();
|
||
|
|
};
|
||
|
|
|
||
|
|
struct B : virtual A {
|
||
|
|
B();
|
||
|
|
~B();
|
||
|
|
};
|
||
|
|
|
||
|
|
struct C : virtual A {
|
||
|
|
C();
|
||
|
|
~C();
|
||
|
|
int c1, c2, c3;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Z {
|
||
|
|
int z;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct D : virtual Z, B, C {
|
||
|
|
D();
|
||
|
|
~D();
|
||
|
|
} d;
|
||
|
|
|
||
|
|
D::~D() {
|
||
|
|
// CHECK-LABEL: define x86_thiscallcc void @"\01??1D@diamond@@UAE@XZ"(%"struct.diamond::D"*)
|
||
|
|
// CHECK: %[[ARG_i8:.*]] = bitcast %"struct.diamond::D"* %{{.*}} to i8*
|
||
|
|
// CHECK: %[[THIS_i8:.*]] = getelementptr inbounds i8* %[[ARG_i8]], i32 -24
|
||
|
|
// CHECK: %[[THIS:.*]] = bitcast i8* %[[THIS_i8]] to %"struct.diamond::D"*
|
||
|
|
// CHECK: store %"struct.diamond::D"* %[[THIS]], %"struct.diamond::D"** %[[THIS_VAL:.*]], align 4
|
||
|
|
// CHECK: %[[THIS:.*]] = load %"struct.diamond::D"** %[[THIS_VAL]]
|
||
|
|
// CHECK: %[[D_i8:.*]] = bitcast %"struct.diamond::D"* %[[THIS]] to i8*
|
||
|
|
// CHECK: %[[C_i8:.*]] = getelementptr inbounds i8* %[[D_i8]], i64 4
|
||
|
|
// CHECK: %[[C:.*]] = bitcast i8* %[[C_i8]] to %"struct.diamond::C"*
|
||
|
|
// CHECK: %[[C_i8:.*]] = bitcast %"struct.diamond::C"* %[[C]] to i8*
|
||
|
|
// CHECK: %[[ARG_i8:.*]] = getelementptr i8* %{{.*}}, i32 16
|
||
|
|
// FIXME: We might consider changing the dtor this parameter type to i8*.
|
||
|
|
// CHECK: %[[ARG:.*]] = bitcast i8* %[[ARG_i8]] to %"struct.diamond::C"*
|
||
|
|
// CHECK: call x86_thiscallcc void @"\01??1C@diamond@@UAE@XZ"(%"struct.diamond::C"* %[[ARG]])
|
||
|
|
|
||
|
|
// CHECK: %[[B:.*]] = bitcast %"struct.diamond::D"* %[[THIS]] to %"struct.diamond::B"*
|
||
|
|
// CHECK: %[[B_i8:.*]] = bitcast %"struct.diamond::B"* %[[B]] to i8*
|
||
|
|
// CHECK: %[[ARG_i8:.*]] = getelementptr i8* %[[B_i8]], i32 4
|
||
|
|
// CHECK: %[[ARG:.*]] = bitcast i8* %[[ARG_i8]] to %"struct.diamond::B"*
|
||
|
|
// CHECK: call x86_thiscallcc void @"\01??1B@diamond@@UAE@XZ"(%"struct.diamond::B"* %[[ARG]])
|
||
|
|
// CHECK: ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|