036603ac59
Summary: When adding an Objective-C retainable type member to a C++ class, also check the LangOpts.ObjCWeak flag and the lifetime qualifier so __weak qualified Objective-C pointer members cause the class to be a non-POD type with non-trivial special members, so the compiler always emits the necessary runtime calls for copying, moving, and destroying the weak member. Otherwise, Objective-C++ classes with weak Objective-C pointer members compiled with -fobjc-weak exhibit undefined behavior if the C++ class is classified as a POD type. Reviewers: rsmith, benlangmuir, doug.gregor, rjmccall Reviewed By: rjmccall Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D31003 llvm-svn: 299008
70 lines
3.4 KiB
Plaintext
70 lines
3.4 KiB
Plaintext
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-weak -fobjc-runtime-has-weak -std=c++11 -o - %s | FileCheck %s
|
|
|
|
struct A { __weak id x; };
|
|
|
|
id test0() {
|
|
A a;
|
|
A b = a;
|
|
A c(static_cast<A&&>(b));
|
|
a = c;
|
|
c = static_cast<A&&>(a);
|
|
return c.x;
|
|
}
|
|
|
|
// Copy Assignment Operator
|
|
// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.A* @_ZN1AaSERKS_(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[OBJECTADDR:%.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK: [[OBJECT:%.*]] = load [[A]]*, [[A]]** [[OBJECTADDR]]
|
|
// CHECK: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[OBJECT]], i32 0, i32 0
|
|
// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_loadWeak(i8** [[T0]])
|
|
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: [[T3:%.*]] = call i8* @objc_storeWeak(i8** [[T2]], i8* [[T1]])
|
|
|
|
// Move Assignment Operator
|
|
// CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %struct.A* @_ZN1AaSEOS_(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[OBJECTADDR:%.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK: [[OBJECT:%.*]] = load [[A]]*, [[A]]** [[OBJECTADDR]]
|
|
// CHECK: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[OBJECT]], i32 0, i32 0
|
|
// CHECK-NEXT: [[T1:%.*]] = call i8* @objc_loadWeak(i8** [[T0]])
|
|
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: [[T3:%.*]] = call i8* @objc_storeWeak(i8** [[T2]], i8* [[T1]])
|
|
|
|
// Default Constructor
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN1AC2Ev(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: store i8* null, i8** [[T0]]
|
|
|
|
// Copy Constructor
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN1AC2ERKS_(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[OBJECTADDR:%.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: [[OBJECT:%.*]] = load [[A]]*, [[A]]** [[OBJECTADDR]]
|
|
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A]], [[A]]* [[OBJECT]], i32 0, i32 0
|
|
// CHECK-NEXT: call void @objc_copyWeak(i8** [[T0]], i8** [[T1]])
|
|
|
|
// Move Constructor
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN1AC2EOS_(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[OBJECTADDR:%.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: [[OBJECT:%.*]] = load [[A]]*, [[A]]** [[OBJECTADDR]]
|
|
// CHECK-NEXT: [[T1:%.*]] = getelementptr inbounds [[A]], [[A]]* [[OBJECT]], i32 0, i32 0
|
|
// CHECK-NEXT: call void @objc_moveWeak(i8** [[T0]], i8** [[T1]])
|
|
|
|
// Destructor
|
|
// CHECK-LABEL: define linkonce_odr void @_ZN1AD2Ev(
|
|
// CHECK: [[THISADDR:%this.*]] = alloca [[A:.*]]*
|
|
// CHECK: [[THIS:%this.*]] = load [[A]]*, [[A]]** [[THISADDR]]
|
|
// CHECK-NEXT: [[T0:%.*]] = getelementptr inbounds [[A]], [[A]]* [[THIS]], i32 0, i32 0
|
|
// CHECK-NEXT: call void @objc_destroyWeak(i8** [[T0]])
|
|
|