6b3351792c
For a definition (of most linkage types), dso_local is set for ELF -fno-pic/-fpie
and COFF, but not for Mach-O. This nuance causes unneeded binary format differences.
This patch replaces (function) `define ` with `define{{.*}} `,
(variable/constant/alias) `= ` with `={{.*}} `, or inserts appropriate `{{.*}} `
if there is an explicit linkage.
* Clang will set dso_local for Mach-O, which is currently implied by TargetMachine.cpp. This will make COFF/Mach-O and executable ELF similar.
* Eventually I hope we can make dso_local the textual LLVM IR default (write explicit "dso_preemptable" when applicable) and -fpic ELF will be similar to everything else. This patch helps move toward that goal.
52 lines
2.7 KiB
Plaintext
52 lines
2.7 KiB
Plaintext
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fobjc-arc -fobjc-runtime-has-weak -o - -std=c++11 %s | FileCheck %s
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// CHECK: %[[TYPE:[a-z0-9]+]] = type opaque
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// CHECK: @[[CFSTRING:[a-z0-9_]+]] = private global %struct.__NSConstantString_tag
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@class NSString;
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// CHECK-LABEL: define{{.*}} void @_Z5test1v
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// CHECK: %[[ALLOCA:[A-Z]+]] = alloca %[[TYPE]]*
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// CHECK: %[[V0:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
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// CHECK: %[[V1:[0-9]+]] = bitcast i8* %[[V0]] to %[[TYPE]]*
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// CHECK: store %[[TYPE]]* %[[V1]], %[[TYPE]]** %[[ALLOCA]]
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// CHECK: %[[V2:[0-9]+]] = bitcast %[[TYPE]]** %[[ALLOCA]]
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// CHECK: call void @llvm.objc.storeStrong(i8** %[[V2]], i8* null)
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void test1() {
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constexpr NSString *S = @"abc";
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test2v
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// CHECK: %[[CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
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// CHECK: %[[REF_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
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// CHECK: %[[V0:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
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// CHECK-NEXT: %[[V1:[0-9]+]] = bitcast i8* %[[V0]] to %[[TYPE]]*
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// CHECK-NEXT: store %[[TYPE]]* %[[V1]], %[[TYPE]]** %[[CONST]]
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// CHECK: %[[V2:[0-9]+]] = call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
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// CHECK-NEXT: %[[V3:[0-9]+]] = bitcast i8* %[[V2]] to %[[TYPE]]*
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// CHECK-NEXT: store %[[TYPE]]* %[[V3]], %[[TYPE]]** %[[REF_CONST]]
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// CHECK: %[[V4:[0-9]+]] = bitcast %[[TYPE]]** %[[REF_CONST]]
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// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V4]], i8* null)
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// CHECK: %[[V5:[0-9]+]] = bitcast %[[TYPE]]** %[[CONST]]
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// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V5]], i8* null)
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void test2() {
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constexpr NSString *Const = @"abc";
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// In IR RefConst should be initialized with Const initializer instead of
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// reading from variable.
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NSString* RefConst = Const;
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test3v
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// CHECK: %[[WEAK_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
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// CHECK: %[[REF_WEAK_CONST:[a-zA-Z]+]] = alloca %[[TYPE]]*
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// CHECK: %[[V0:[0-9]+]] = bitcast %[[TYPE]]** %[[WEAK_CONST]]
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// CHECK-NEXT: %[[V1:[0-9]+]] = call i8* @llvm.objc.initWeak(i8** %[[V0]], i8* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]]
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// CHECK: store %[[TYPE]]* bitcast (%struct.__NSConstantString_tag* @[[CFSTRING]] to %[[TYPE]]*), %[[TYPE]]** %[[REF_WEAK_CONST]]
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// CHECK: %[[V2:[0-9]+]] = bitcast %[[TYPE]]** %[[REF_WEAK_CONST]]
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// CHECK-NEXT: call void @llvm.objc.storeStrong(i8** %[[V2]], i8* null)
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// CHECK: %[[V3:[0-9]+]] = bitcast %[[TYPE]]** %[[WEAK_CONST]]
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// CHECK-NEXT: call void @llvm.objc.destroyWeak(i8** %[[V3]])
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void test3() {
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__weak constexpr NSString *WeakConst = @"abc";
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NSString* RefWeakConst = WeakConst;
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}
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