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[ObjC][ARC] Delete ObjC runtime calls on global variables annotated
with 'objc_arc_inert' Those calls are no-ops, so they can be safely deleted. rdar://problem/49839633 Differential Revision: https://reviews.llvm.org/D62433 llvm-svn: 363468
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Original file line number | Diff line number | Diff line change |
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; RUN: opt -objc-arc -S < %s | FileCheck %s | ||
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%0 = type opaque | ||
%struct.__NSConstantString_tag = type { i32*, i32, i8*, i64 } | ||
%struct.__block_descriptor = type { i64, i64 } | ||
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@__CFConstantStringClassReference = external global [0 x i32] | ||
@.str = private unnamed_addr constant [4 x i8] c"abc\00", section "__TEXT,__cstring,cstring_literals", align 1 | ||
@.str1 = private unnamed_addr constant [4 x i8] c"def\00", section "__TEXT,__cstring,cstring_literals", align 1 | ||
@_unnamed_cfstring_ = private global %struct.__NSConstantString_tag { i32* getelementptr inbounds ([0 x i32], [0 x i32]* @__CFConstantStringClassReference, i32 0, i32 0), i32 1992, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i64 3 }, section "__DATA,__cfstring", align 8 #0 | ||
@_unnamed_cfstring_wo_attr = private global %struct.__NSConstantString_tag { i32* getelementptr inbounds ([0 x i32], [0 x i32]* @__CFConstantStringClassReference, i32 0, i32 0), i32 1992, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str1, i32 0, i32 0), i64 3 }, section "__DATA,__cfstring", align 8 | ||
@_NSConcreteGlobalBlock = external global i8* | ||
@.str.1 = private unnamed_addr constant [6 x i8] c"v8@?0\00", align 1 | ||
@"__block_descriptor_32_e5_v8@?0l" = linkonce_odr hidden unnamed_addr constant { i64, i64, i8*, i8* } { i64 0, i64 32, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i32 0, i32 0), i8* null }, align 8 | ||
@__block_literal_global = internal constant { i8**, i32, i32, i8*, %struct.__block_descriptor* } { i8** @_NSConcreteGlobalBlock, i32 1342177280, i32 0, i8* bitcast (void (i8*)* @__globalBlock_block_invoke to i8*), %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8* }* @"__block_descriptor_32_e5_v8@?0l" to %struct.__block_descriptor*) }, align 8 #0 | ||
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; CHECK-LABEL: define %0* @stringLiteral() | ||
; CHECK-NOT: call | ||
; CHECK: ret %0* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_ to %0*) | ||
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define %0* @stringLiteral() { | ||
%1 = tail call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_ to i8*)) | ||
%2 = call i8* @llvm.objc.autorelease(i8* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_ to i8*)) | ||
ret %0* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_ to %0*) | ||
} | ||
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; CHECK-LABEL: define %0* @stringLiteral1() | ||
; CHECK-NEXT: call i8* @llvm.objc.retain( | ||
; CHECK-NEXT: call i8* @llvm.objc.autorelease( | ||
; CHECK-NEXT: ret %0* | ||
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define %0* @stringLiteral1() { | ||
%1 = tail call i8* @llvm.objc.retain(i8* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_wo_attr to i8*)) | ||
%2 = call i8* @llvm.objc.autorelease(i8* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_wo_attr to i8*)) | ||
ret %0* bitcast (%struct.__NSConstantString_tag* @_unnamed_cfstring_wo_attr to %0*) | ||
} | ||
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; CHECK-LABEL: define void (...)* @globalBlock() | ||
; CHECK-NOT: call | ||
; CHECK: %[[V1:.*]] = bitcast i8* bitcast ({ i8**, i32, i32, i8*, %struct.__block_descriptor* }* @__block_literal_global to i8*) to void (...)* | ||
; CHECK-NEXT: ret void (...)* %[[V1]] | ||
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define void (...)* @globalBlock() { | ||
%1 = tail call i8* @llvm.objc.retainBlock(i8* bitcast ({ i8**, i32, i32, i8*, %struct.__block_descriptor* }* @__block_literal_global to i8*)) | ||
%2 = tail call i8* @llvm.objc.retainBlock(i8* %1) | ||
%3 = bitcast i8* %2 to void (...)* | ||
tail call void @llvm.objc.release(i8* %1) | ||
%4 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %2) | ||
ret void (...)* %3 | ||
} | ||
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define internal void @__globalBlock_block_invoke(i8* nocapture readnone) { | ||
tail call void @foo() | ||
ret void | ||
} | ||
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declare void @foo() | ||
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declare i8* @llvm.objc.retain(i8*) local_unnamed_addr | ||
declare i8* @llvm.objc.autoreleaseReturnValue(i8*) local_unnamed_addr | ||
declare i8* @llvm.objc.retainBlock(i8*) local_unnamed_addr | ||
declare void @llvm.objc.release(i8*) local_unnamed_addr | ||
declare i8* @llvm.objc.autorelease(i8*) local_unnamed_addr | ||
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attributes #0 = { "objc_arc_inert" } |