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llvm-6502/test/Transforms/ObjCARC/retain-block-alloca.ll

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Don't eliminate objc_retainBlock calls on stack objects if the objc_retainBlock call is potentially responsible for copying the block to the heap to extend its lifetime. rdar://10209613. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:25:23 +00:00
; RUN: opt -S -objc-arc < %s | FileCheck %s
; rdar://10209613
%0 = type opaque
%struct.__block_descriptor = type { i64, i64 }
@_NSConcreteStackBlock = external global i8*
@__block_descriptor_tmp = external hidden constant { i64, i64, i8*, i8*, i8*, i8* }
@"\01L_OBJC_SELECTOR_REFERENCES_" = external hidden global i8*, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip"
Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata tag on objc_retainBlock calls, which indicates that they may be optimized away. rdar://10211286. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142298 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17 22:53:25 +00:00
; CHECK: define void @test(
Use references to attribute groups on the call/invoke instructions. Listing all of the attributes for the callee of a call/invoke instruction is way too much and makes the IR unreadable. Use references to attributes instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175877 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-22 09:09:42 +00:00
; CHECK: %3 = call i8* @objc_retainBlock(i8* %2) [[NUW:#[0-9]+]]
Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata tag on objc_retainBlock calls, which indicates that they may be optimized away. rdar://10211286. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142298 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17 22:53:25 +00:00
; CHECK: @objc_msgSend
; CHECK-NEXT: @objc_release(i8* %3)
Don't eliminate objc_retainBlock calls on stack objects if the objc_retainBlock call is potentially responsible for copying the block to the heap to extend its lifetime. rdar://10209613. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:25:23 +00:00
define void @test(%0* %array) uwtable {
entry:
%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>, align 8
%0 = bitcast %0* %array to i8*
%1 = tail call i8* @objc_retain(i8* %0) nounwind
%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 0
store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8
%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 1
store i32 1107296256, i32* %block.flags, align 8
%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 2
store i32 0, i32* %block.reserved, align 4
%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 3
store i8* bitcast (void (i8*)* @__test_block_invoke_0 to i8*), i8** %block.invoke, align 8
%block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 4
store %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8*, i8*, i8* }* @__block_descriptor_tmp to %struct.__block_descriptor*), %struct.__block_descriptor** %block.descriptor, align 8
%block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 5
store %0* %array, %0** %block.captured, align 8
%2 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block to i8*
%3 = call i8* @objc_retainBlock(i8* %2) nounwind
%tmp2 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, i8*)*)(i8* %0, i8* %tmp2, i8* %3)
call void @objc_release(i8* %3) nounwind
%strongdestroy = load %0** %block.captured, align 8
%4 = bitcast %0* %strongdestroy to i8*
call void @objc_release(i8* %4) nounwind, !clang.imprecise_release !0
ret void
}
Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata tag on objc_retainBlock calls, which indicates that they may be optimized away. rdar://10211286. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142298 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17 22:53:25 +00:00
; Same as test, but the objc_retainBlock has a clang.arc.copy_on_escape
; tag so it's safe to delete.
; CHECK: define void @test_with_COE(
; CHECK-NOT: @objc_retainBlock
; CHECK: @objc_msgSend
; CHECK: @objc_release
; CHECK-NOT: @objc_release
; CHECK: }
define void @test_with_COE(%0* %array) uwtable {
entry:
%block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>, align 8
%0 = bitcast %0* %array to i8*
%1 = tail call i8* @objc_retain(i8* %0) nounwind
%block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 0
store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8
%block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 1
store i32 1107296256, i32* %block.flags, align 8
%block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 2
store i32 0, i32* %block.reserved, align 4
%block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 3
store i8* bitcast (void (i8*)* @__test_block_invoke_0 to i8*), i8** %block.invoke, align 8
%block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 4
store %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8*, i8*, i8* }* @__block_descriptor_tmp to %struct.__block_descriptor*), %struct.__block_descriptor** %block.descriptor, align 8
%block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block, i64 0, i32 5
store %0* %array, %0** %block.captured, align 8
%2 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %block to i8*
%3 = call i8* @objc_retainBlock(i8* %2) nounwind, !clang.arc.copy_on_escape !0
%tmp2 = load i8** @"\01L_OBJC_SELECTOR_REFERENCES_", align 8
call void bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to void (i8*, i8*, i8*)*)(i8* %0, i8* %tmp2, i8* %3)
call void @objc_release(i8* %3) nounwind
%strongdestroy = load %0** %block.captured, align 8
%4 = bitcast %0* %strongdestroy to i8*
call void @objc_release(i8* %4) nounwind, !clang.imprecise_release !0
ret void
}
Don't eliminate objc_retainBlock calls on stack objects if the objc_retainBlock call is potentially responsible for copying the block to the heap to extend its lifetime. rdar://10209613. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:25:23 +00:00
declare i8* @objc_retain(i8*)
declare void @__test_block_invoke_0(i8* nocapture) uwtable
declare i8* @objc_retainBlock(i8*)
declare i8* @objc_msgSend(i8*, i8*, ...) nonlazybind
declare void @objc_release(i8*)
Use references to attribute groups on the call/invoke instructions. Listing all of the attributes for the callee of a call/invoke instruction is way too much and makes the IR unreadable. Use references to attributes instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175877 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-22 09:09:42 +00:00
; CHECK: attributes #0 = { uwtable }
; CHECK: attributes #1 = { nonlazybind }
; CHECK: attributes [[NUW]] = { nounwind }
Don't eliminate objc_retainBlock calls on stack objects if the objc_retainBlock call is potentially responsible for copying the block to the heap to extend its lifetime. rdar://10209613. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140814 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:25:23 +00:00
!0 = metadata !{}
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