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4e6a540024
The relative vtable ABI will use a struct rather than an array as the type of a vtable. LLVM only allows 32-bit integers as struct indices, so we need to use 32-bit integers to get addresses of address points. In order to keep the code simple, we might as well do that unconditionally. It's probably a reasonable implementation limit to support no more than 2 billion virtual functions per class. This change causes quite a bit of churn in the test suite, so I'm making it separately. Differential Revision: http://reviews.llvm.org/D18113 llvm-svn: 263469
201 lines
4.1 KiB
C++
201 lines
4.1 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - | FileCheck %s
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// See Test9 for test description.
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// CHECK: @_ZTTN5Test91BE = linkonce_odr unnamed_addr constant
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namespace Test1 {
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// Check that we don't initialize the vtable pointer in A::~A(), since the destructor body is trivial.
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struct A {
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virtual void f();
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~A();
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};
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// CHECK-LABEL: define void @_ZN5Test11AD2Ev
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// CHECK-NOT: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test11AE, i64 0, i64 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test2 {
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// Check that we do initialize the vtable pointer in A::~A() since the destructor body isn't trivial.
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struct A {
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virtual void f();
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~A();
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};
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// CHECK-LABEL: define void @_ZN5Test21AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test21AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A() {
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f();
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}
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}
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namespace Test3 {
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// Check that we don't initialize the vtable pointer in A::~A(), since the destructor body is trivial
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// and Field's destructor body is also trivial.
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struct Field {
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~Field() { }
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};
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test31AD2Ev
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// CHECK-NOT: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test31AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A() {
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}
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}
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namespace Test4 {
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// Check that we do initialize the vtable pointer in A::~A(), since Field's destructor body
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// isn't trivial.
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void f();
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struct Field {
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~Field() { f(); }
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};
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test41AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test41AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test5 {
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// Check that we do initialize the vtable pointer in A::~A(), since Field's destructor isn't
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// available in this translation unit.
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struct Field {
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~Field();
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};
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test51AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test51AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test6 {
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// Check that we do initialize the vtable pointer in A::~A(), since Field has a member
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// variable with a non-trivial destructor body.
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struct NonTrivialDestructorBody {
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~NonTrivialDestructorBody();
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};
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struct Field {
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NonTrivialDestructorBody nonTrivialDestructorBody;
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};
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test61AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test61AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test7 {
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// Check that we do initialize the vtable pointer in A::~A(), since Field has a base
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// class with a non-trivial destructor body.
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struct NonTrivialDestructorBody {
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~NonTrivialDestructorBody();
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};
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struct Field : NonTrivialDestructorBody { };
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test71AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test71AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test8 {
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// Check that we do initialize the vtable pointer in A::~A(), since Field has a virtual base
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// class with a non-trivial destructor body.
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struct NonTrivialDestructorBody {
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~NonTrivialDestructorBody();
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};
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struct Field : virtual NonTrivialDestructorBody { };
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struct A {
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virtual void f();
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~A();
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Field field;
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};
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// CHECK-LABEL: define void @_ZN5Test81AD2Ev
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// CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([3 x i8*], [3 x i8*]* @_ZTVN5Test81AE, i32 0, i32 2) to i32 (...)**), i32 (...)***
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A::~A()
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{
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}
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}
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namespace Test9 {
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// Check that we emit a VTT for B, even though we don't initialize the vtable pointer in the destructor.
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struct A { virtual ~A () { } };
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struct B : virtual A {};
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struct C : virtual B {
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virtual ~C();
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};
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C::~C() {}
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}
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