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20fd978e4b
(but not of) a block pointer do not cause the block pointer to escape. This fixes rdar://10803830. llvm-svn: 150424
52 lines
2.6 KiB
LLVM
52 lines
2.6 KiB
LLVM
; RUN: opt -objc-arc -S < %s | FileCheck %s
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; rdar://10803830
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; The optimizer should be able to prove that the block does not
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; "escape", so the retainBlock+release pair can be eliminated.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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%struct.__block_descriptor = type { i64, i64 }
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@_NSConcreteStackBlock = external global i8*
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@__block_descriptor_tmp = external global { i64, i64, i8*, i8* }
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; CHECK: define void @test() {
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; CHECK-NOT: @objc
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; CHECK: declare i8* @objc_retainBlock(i8*)
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; CHECK: declare void @objc_release(i8*)
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define void @test() {
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entry:
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%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>, align 8
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%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 0
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store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8
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%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 1
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store i32 1073741824, i32* %block.flags, align 8
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%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 2
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store i32 0, i32* %block.reserved, align 4
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%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 3
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store i8* bitcast (i32 (i8*)* @__test_block_invoke_0 to i8*), i8** %block.invoke, align 8
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%block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 4
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store %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8* }* @__block_descriptor_tmp to %struct.__block_descriptor*), %struct.__block_descriptor** %block.descriptor, align 8
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%block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 5
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store i32 4, i32* %block.captured, align 8
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%tmp = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block to i8*
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%tmp1 = call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0
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%tmp2 = getelementptr inbounds i8* %tmp1, i64 16
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%tmp3 = bitcast i8* %tmp2 to i8**
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%tmp4 = load i8** %tmp3, align 8
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%tmp5 = bitcast i8* %tmp4 to i32 (i8*)*
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%call = call i32 %tmp5(i8* %tmp1)
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call void @objc_release(i8* %tmp1) nounwind, !clang.imprecise_release !0
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ret void
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}
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declare i32 @__test_block_invoke_0(i8* nocapture %.block_descriptor) nounwind readonly
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declare i8* @objc_retainBlock(i8*)
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declare void @objc_release(i8*)
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!0 = metadata !{}
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