501 lines
16 KiB
LLVM
501 lines
16 KiB
LLVM
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; RUN: opt -objc-arc -S < %s | FileCheck %s
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declare i8* @llvm.objc.retain(i8*)
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declare i8* @llvm.objc.retainAutoreleasedReturnValue(i8*)
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declare void @llvm.objc.release(i8*)
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declare i8* @llvm.objc.autorelease(i8*)
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declare i8* @llvm.objc.autoreleaseReturnValue(i8*)
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declare void @llvm.objc.autoreleasePoolPop(i8*)
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declare i8* @llvm.objc.autoreleasePoolPush()
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declare i8* @llvm.objc.retainBlock(i8*)
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declare i8* @objc_retainedObject(i8*)
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declare i8* @objc_unretainedObject(i8*)
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declare i8* @objc_unretainedPointer(i8*)
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declare void @use_pointer(i8*)
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declare void @callee()
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declare void @callee_fnptr(void ()*)
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declare void @invokee()
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declare i8* @returner()
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declare i8* @returner1()
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declare i8* @returner2()
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declare void @bar(i32 ()*)
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declare void @use_alloca(i8**)
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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declare i8* @llvm.objc.msgSend(i8*, i8*, ...)
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; In the presence of allocas, unconditionally remove retain/release pairs only
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; if they are known safe in both directions. This prevents matching up an inner
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; retain with the boundary guarding release in the following situation:
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;
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; %A = alloca
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; retain(%x)
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; retain(%x) <--- Inner Retain
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; store %x, %A
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; %y = load %A
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; ... DO STUFF ...
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; release(%y)
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; release(%x) <--- Guarding Release
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;
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; rdar://13750319
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; CHECK: define void @test1a(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1a(i8* %x) {
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entry:
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%A = alloca i8*
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %A, align 8
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%y = load i8*, i8** %A
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test1b(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1b(i8* %x) {
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entry:
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%A = alloca i8*
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%gep = getelementptr i8*, i8** %A, i32 0
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %gep, align 8
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%y = load i8*, i8** %A
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test1c(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1c(i8* %x) {
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entry:
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%A = alloca i8*, i32 3
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%gep = getelementptr i8*, i8** %A, i32 2
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %gep, align 8
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%y = load i8*, i8** %gep
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test1d(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1d(i8* %x) {
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entry:
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br i1 undef, label %use_allocaA, label %use_allocaB
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use_allocaA:
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%allocaA = alloca i8*
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br label %exit
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use_allocaB:
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%allocaB = alloca i8*
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br label %exit
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exit:
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%A = phi i8** [ %allocaA, %use_allocaA ], [ %allocaB, %use_allocaB ]
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%gep = getelementptr i8*, i8** %A, i32 0
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %gep, align 8
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%y = load i8*, i8** %gep
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test1e(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1e(i8* %x) {
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entry:
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br i1 undef, label %use_allocaA, label %use_allocaB
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use_allocaA:
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%allocaA = alloca i8*, i32 4
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br label %exit
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use_allocaB:
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%allocaB = alloca i8*, i32 4
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br label %exit
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exit:
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%A = phi i8** [ %allocaA, %use_allocaA ], [ %allocaB, %use_allocaB ]
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%gep = getelementptr i8*, i8** %A, i32 2
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %gep, align 8
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%y = load i8*, i8** %gep
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test1f(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test1f(i8* %x) {
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entry:
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%allocaOne = alloca i8*
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%allocaTwo = alloca i8*
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%A = select i1 undef, i8** %allocaOne, i8** %allocaTwo
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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store i8* %x, i8** %A, align 8
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%y = load i8*, i8** %A
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; Make sure that if a store is in a different basic block we handle known safe
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; conservatively.
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; CHECK: define void @test2a(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test2a(i8* %x) {
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entry:
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%A = alloca i8*
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store i8* %x, i8** %A, align 8
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%y = load i8*, i8** %A
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test2b(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test2b(i8* %x) {
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entry:
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%A = alloca i8*
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%gep1 = getelementptr i8*, i8** %A, i32 0
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store i8* %x, i8** %gep1, align 8
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%gep2 = getelementptr i8*, i8** %A, i32 0
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%y = load i8*, i8** %gep2
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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tail call i8* @llvm.objc.retain(i8* %x)
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tail call i8* @llvm.objc.retain(i8* %x)
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test2c(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test2c(i8* %x) {
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entry:
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%A = alloca i8*, i32 3
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%gep1 = getelementptr i8*, i8** %A, i32 2
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store i8* %x, i8** %gep1, align 8
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%gep2 = getelementptr i8*, i8** %A, i32 2
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%y = load i8*, i8** %gep2
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tail call i8* @llvm.objc.retain(i8* %x)
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br label %bb1
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bb1:
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br label %bb2
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bb2:
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br label %bb3
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bb3:
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tail call i8* @llvm.objc.retain(i8* %x)
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call void @use_alloca(i8** %A)
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call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
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call void @use_pointer(i8* %x)
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call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
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ret void
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}
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; CHECK: define void @test2d(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.retain(i8* %x)
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; CHECK: @llvm.objc.release(i8* %y)
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; CHECK: @llvm.objc.release(i8* %x)
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; CHECK: ret void
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; CHECK: }
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define void @test2d(i8* %x) {
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entry:
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tail call i8* @llvm.objc.retain(i8* %x)
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br label %bb1
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bb1:
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%Abb1 = alloca i8*, i32 3
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%gepbb11 = getelementptr i8*, i8** %Abb1, i32 2
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store i8* %x, i8** %gepbb11, align 8
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%gepbb12 = getelementptr i8*, i8** %Abb1, i32 2
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%ybb1 = load i8*, i8** %gepbb12
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br label %bb3
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bb2:
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%Abb2 = alloca i8*, i32 4
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%gepbb21 = getelementptr i8*, i8** %Abb2, i32 2
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store i8* %x, i8** %gepbb21, align 8
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%gepbb22 = getelementptr i8*, i8** %Abb2, i32 2
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%ybb2 = load i8*, i8** %gepbb22
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|
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br label %bb3
|
||
|
|
|
||
|
|
bb3:
|
||
|
|
%A = phi i8** [ %Abb1, %bb1 ], [ %Abb2, %bb2 ]
|
||
|
|
%y = phi i8* [ %ybb1, %bb1 ], [ %ybb2, %bb2 ]
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %x)
|
||
|
|
call void @use_alloca(i8** %A)
|
||
|
|
call void @llvm.objc.release(i8* %y), !clang.imprecise_release !0
|
||
|
|
call void @use_pointer(i8* %x)
|
||
|
|
call void @llvm.objc.release(i8* %x), !clang.imprecise_release !0
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Make sure in the presence of allocas, if we find a cfghazard we do not perform
|
||
|
|
; code motion even if we are known safe. These two concepts are separate and
|
||
|
|
; should be treated as such.
|
||
|
|
;
|
||
|
|
; rdar://13949644
|
||
|
|
|
||
|
|
; CHECK: define void @test3a() {
|
||
|
|
; CHECK: entry:
|
||
|
|
; CHECK: @llvm.objc.retainAutoreleasedReturnValue
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: arraydestroy.body:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.done:
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.body1:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.done1:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK: ret void
|
||
|
|
; CHECK: }
|
||
|
|
define void @test3a() {
|
||
|
|
entry:
|
||
|
|
%keys = alloca [2 x i8*], align 16
|
||
|
|
%objs = alloca [2 x i8*], align 16
|
||
|
|
|
||
|
|
%call1 = call i8* @returner()
|
||
|
|
%tmp0 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call1)
|
||
|
|
|
||
|
|
%objs.begin = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 0
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call1)
|
||
|
|
store i8* %call1, i8** %objs.begin, align 8
|
||
|
|
%objs.elt = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 1
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call1)
|
||
|
|
store i8* %call1, i8** %objs.elt
|
||
|
|
|
||
|
|
%call2 = call i8* @returner1()
|
||
|
|
%call3 = call i8* @returner2()
|
||
|
|
%keys.begin = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 0
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call2)
|
||
|
|
store i8* %call2, i8** %keys.begin, align 8
|
||
|
|
%keys.elt = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 1
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call3)
|
||
|
|
store i8* %call3, i8** %keys.elt
|
||
|
|
|
||
|
|
%gep = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 2
|
||
|
|
br label %arraydestroy.body
|
||
|
|
|
||
|
|
arraydestroy.body:
|
||
|
|
%arraydestroy.elementPast = phi i8** [ %gep, %entry ], [ %arraydestroy.element, %arraydestroy.body ]
|
||
|
|
%arraydestroy.element = getelementptr inbounds i8*, i8** %arraydestroy.elementPast, i64 -1
|
||
|
|
%destroy_tmp = load i8*, i8** %arraydestroy.element, align 8
|
||
|
|
call void @llvm.objc.release(i8* %destroy_tmp), !clang.imprecise_release !0
|
||
|
|
%objs_ptr = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 0
|
||
|
|
%arraydestroy.cmp = icmp eq i8** %arraydestroy.element, %objs_ptr
|
||
|
|
br i1 %arraydestroy.cmp, label %arraydestroy.done, label %arraydestroy.body
|
||
|
|
|
||
|
|
arraydestroy.done:
|
||
|
|
%gep1 = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 2
|
||
|
|
br label %arraydestroy.body1
|
||
|
|
|
||
|
|
arraydestroy.body1:
|
||
|
|
%arraydestroy.elementPast1 = phi i8** [ %gep1, %arraydestroy.done ], [ %arraydestroy.element1, %arraydestroy.body1 ]
|
||
|
|
%arraydestroy.element1 = getelementptr inbounds i8*, i8** %arraydestroy.elementPast1, i64 -1
|
||
|
|
%destroy_tmp1 = load i8*, i8** %arraydestroy.element1, align 8
|
||
|
|
call void @llvm.objc.release(i8* %destroy_tmp1), !clang.imprecise_release !0
|
||
|
|
%keys_ptr = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 0
|
||
|
|
%arraydestroy.cmp1 = icmp eq i8** %arraydestroy.element1, %keys_ptr
|
||
|
|
br i1 %arraydestroy.cmp1, label %arraydestroy.done1, label %arraydestroy.body1
|
||
|
|
|
||
|
|
arraydestroy.done1:
|
||
|
|
call void @llvm.objc.release(i8* %call1), !clang.imprecise_release !0
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
; Make sure that even though we stop said code motion we still allow for
|
||
|
|
; pointers to be removed if we are known safe in both directions.
|
||
|
|
;
|
||
|
|
; rdar://13949644
|
||
|
|
|
||
|
|
; CHECK: define void @test3b() {
|
||
|
|
; CHECK: entry:
|
||
|
|
; CHECK: @llvm.objc.retainAutoreleasedReturnValue
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: @llvm.objc.retain
|
||
|
|
; CHECK: arraydestroy.body:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.done:
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.body1:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK-NOT: @llvm.objc.release
|
||
|
|
; CHECK: arraydestroy.done1:
|
||
|
|
; CHECK: @llvm.objc.release
|
||
|
|
; CHECK: ret void
|
||
|
|
; CHECK: }
|
||
|
|
define void @test3b() {
|
||
|
|
entry:
|
||
|
|
%keys = alloca [2 x i8*], align 16
|
||
|
|
%objs = alloca [2 x i8*], align 16
|
||
|
|
|
||
|
|
%call1 = call i8* @returner()
|
||
|
|
%tmp0 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call1)
|
||
|
|
%tmp1 = tail call i8* @llvm.objc.retain(i8* %call1)
|
||
|
|
|
||
|
|
%objs.begin = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 0
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call1)
|
||
|
|
store i8* %call1, i8** %objs.begin, align 8
|
||
|
|
%objs.elt = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 1
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call1)
|
||
|
|
store i8* %call1, i8** %objs.elt
|
||
|
|
|
||
|
|
%call2 = call i8* @returner1()
|
||
|
|
%call3 = call i8* @returner2()
|
||
|
|
%keys.begin = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 0
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call2)
|
||
|
|
store i8* %call2, i8** %keys.begin, align 8
|
||
|
|
%keys.elt = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 1
|
||
|
|
tail call i8* @llvm.objc.retain(i8* %call3)
|
||
|
|
store i8* %call3, i8** %keys.elt
|
||
|
|
|
||
|
|
%gep = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 2
|
||
|
|
br label %arraydestroy.body
|
||
|
|
|
||
|
|
arraydestroy.body:
|
||
|
|
%arraydestroy.elementPast = phi i8** [ %gep, %entry ], [ %arraydestroy.element, %arraydestroy.body ]
|
||
|
|
%arraydestroy.element = getelementptr inbounds i8*, i8** %arraydestroy.elementPast, i64 -1
|
||
|
|
%destroy_tmp = load i8*, i8** %arraydestroy.element, align 8
|
||
|
|
call void @llvm.objc.release(i8* %destroy_tmp), !clang.imprecise_release !0
|
||
|
|
%objs_ptr = getelementptr inbounds [2 x i8*], [2 x i8*]* %objs, i64 0, i64 0
|
||
|
|
%arraydestroy.cmp = icmp eq i8** %arraydestroy.element, %objs_ptr
|
||
|
|
br i1 %arraydestroy.cmp, label %arraydestroy.done, label %arraydestroy.body
|
||
|
|
|
||
|
|
arraydestroy.done:
|
||
|
|
%gep1 = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 2
|
||
|
|
br label %arraydestroy.body1
|
||
|
|
|
||
|
|
arraydestroy.body1:
|
||
|
|
%arraydestroy.elementPast1 = phi i8** [ %gep1, %arraydestroy.done ], [ %arraydestroy.element1, %arraydestroy.body1 ]
|
||
|
|
%arraydestroy.element1 = getelementptr inbounds i8*, i8** %arraydestroy.elementPast1, i64 -1
|
||
|
|
%destroy_tmp1 = load i8*, i8** %arraydestroy.element1, align 8
|
||
|
|
call void @llvm.objc.release(i8* %destroy_tmp1), !clang.imprecise_release !0
|
||
|
|
%keys_ptr = getelementptr inbounds [2 x i8*], [2 x i8*]* %keys, i64 0, i64 0
|
||
|
|
%arraydestroy.cmp1 = icmp eq i8** %arraydestroy.element1, %keys_ptr
|
||
|
|
br i1 %arraydestroy.cmp1, label %arraydestroy.done1, label %arraydestroy.body1
|
||
|
|
|
||
|
|
arraydestroy.done1:
|
||
|
|
call void @llvm.objc.release(i8* %call1), !clang.imprecise_release !0
|
||
|
|
call void @llvm.objc.release(i8* %call1), !clang.imprecise_release !0
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
!0 = !{}
|
||
|
|
|
||
|
|
declare i32 @__gxx_personality_v0(...)
|