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| // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -fobjc-runtime-has-weak -o - -std=c++11 %s | FileCheck %s
// CHECK: %[[TYPE:[a-z0-9]+]] = type opaque
// CHECK: @[[CFSTRING:[a-z0-9_]+]] = private global %struct.__NSConstantString_tag
@class NSString;
// CHECK-LABEL: define void @_Z5test1v
// CHECK: %[[ALLOCA:[A-Z]+]] = alloca %[[TYPE]]*
// CHECK: %[[V0:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
// CHECK: %[[V1:[0-9]+]] = bitcast i8* %[[V0]] to %[[TYPE]]*
// CHECK: store %[[TYPE]]* %[[V1]], %[[TYPE]]** %[[ALLOCA]]
// CHECK: %[[V2:[0-9]+]] = bitcast %[[TYPE]]** %[[ALLOCA]]
// CHECK: call void @llvm.objc.storeStrong(i8** %[[V2]], i8* null)
void test1() {
constexpr NSString *S = @"abc";
}
// CHECK-LABEL: define void @_Z5test2v
// CHECK: %[[CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
// CHECK: %[[REF_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
// CHECK: %[[V0:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
// CHECK-NEXT: %[[V1:[0-9]+]] = bitcast i8* %[[V0]] to %[[TYPE]]*
// CHECK-NEXT: store %[[TYPE]]* %[[V1]], %[[TYPE]]** %[[CONST]]
// CHECK: %[[V2:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
// CHECK-NEXT: %[[V3:[0-9]+]] = bitcast i8* %[[V2]] to %[[TYPE]]*
// CHECK-NEXT: store %[[TYPE]]* %[[V3]], %[[TYPE]]** %[[REF_CONST]]
// CHECK: %[[V4:[0-9]+]] = bitcast %[[TYPE]]** %[[REF_CONST]]
// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V4]], i8* null)
// CHECK: %[[V5:[0-9]+]] = bitcast %[[TYPE]]** %[[CONST]]
// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V5]], i8* null)
void test2() {
constexpr NSString *Const = @"abc";
// In IR RefConst should be initialized with Const initializer instead of
// reading from variable.
NSString* RefConst = Const;
}
// CHECK-LABEL: define void @_Z5test3v
// CHECK: %[[WEAK_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
// CHECK: %[[REF_WEAK_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
// CHECK: %[[V0:[0-9]+]] = bitcast %[[TYPE]]** %[[WEAK_CONST]]
// CHECK-NEXT: %[[V1:[0-9]+]] = call i8* @llvm.objc.initWeak(i8** %[[V0]], i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
// CHECK: store %[[TYPE]]* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]] to %[[TYPE]]*), %[[TYPE]]** %[[REF_WEAK_CONST]]
// CHECK: %[[V2:[0-9]+]] = bitcast %[[TYPE]]** %[[REF_WEAK_CONST]]
// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V2]], i8* null)
// CHECK: %[[V3:[0-9]+]] = bitcast %[[TYPE]]** %[[WEAK_CONST]]
// CHECK-NEXT: call void @llvm.objc.destroyWeak(i8** %[[V3]])
void test3() {
__weak constexpr NSString *WeakConst = @"abc";
NSString* RefWeakConst = WeakConst;
}
|