derek.holloway
7502bf64a4
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109 lines
3.7 KiB
LLVM
109 lines
3.7 KiB
LLVM
; RUN: opt -passes=objc-arc -S < %s | FileCheck %s
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declare void @llvm.objc.release(ptr %x)
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declare ptr @llvm.objc.retain(ptr %x)
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declare ptr @llvm.objc.autorelease(ptr %x)
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declare ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
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declare ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %x)
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declare ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %x)
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declare ptr @tmp(ptr)
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; Never tail call objc_autorelease.
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; CHECK: define ptr @test0(ptr %x) [[NUW:#[0-9]+]] {
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; CHECK: %tmp0 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
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; CHECK: %tmp1 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
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; CHECK: }
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define ptr @test0(ptr %x) nounwind {
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entry:
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%tmp0 = call ptr @llvm.objc.autorelease(ptr %x)
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%tmp1 = tail call ptr @llvm.objc.autorelease(ptr %x)
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ret ptr %x
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}
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; Always tail call autoreleaseReturnValue.
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; CHECK: define ptr @test1(ptr %x) [[NUW]] {
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; CHECK: %tmp0 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x) [[NUW]]
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; CHECK: %tmp1 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x) [[NUW]]
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; CHECK: }
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define ptr @test1(ptr %x) nounwind {
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entry:
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%tmp0 = call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
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%tmp1 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
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ret ptr %x
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}
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; Always tail call objc_retain.
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; CHECK: define ptr @test2(ptr %x) [[NUW]] {
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; CHECK: %tmp0 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]]
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; CHECK: %tmp1 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]]
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; CHECK: }
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define ptr @test2(ptr %x) nounwind {
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entry:
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%tmp0 = call ptr @llvm.objc.retain(ptr %x)
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%tmp1 = tail call ptr @llvm.objc.retain(ptr %x)
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ret ptr %x
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}
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; Always tail call objc_retainAutoreleasedReturnValue unless it's annotated with
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; notail.
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; CHECK: define ptr @test3(ptr %x) [[NUW]] {
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; CHECK: %tmp0 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %y) [[NUW]]
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; CHECK: %tmp1 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z) [[NUW]]
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; CHECK: %tmp2 = notail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z2) [[NUW]]
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; CHECK: }
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define ptr @test3(ptr %x) nounwind {
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entry:
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%y = call ptr @tmp(ptr %x)
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%tmp0 = call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %y)
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%z = call ptr @tmp(ptr %x)
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%tmp1 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z)
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%z2 = call ptr @tmp(ptr %x)
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%tmp2 = notail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %z2)
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ret ptr %x
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}
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; By itself, we should never change whether or not objc_release is tail called.
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; CHECK: define void @test4(ptr %x) [[NUW]] {
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; CHECK: call void @llvm.objc.release(ptr %x) [[NUW]]
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; CHECK: tail call void @llvm.objc.release(ptr %x) [[NUW]]
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; CHECK: }
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define void @test4(ptr %x) nounwind {
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entry:
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call void @llvm.objc.release(ptr %x)
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tail call void @llvm.objc.release(ptr %x)
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ret void
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}
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; If we convert a tail called @llvm.objc.autoreleaseReturnValue to an
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; @llvm.objc.autorelease, ensure that the tail call is removed.
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; CHECK: define ptr @test5(ptr %x) [[NUW]] {
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; CHECK: %tmp0 = call ptr @llvm.objc.autorelease(ptr %x) [[NUW]]
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; CHECK: }
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define ptr @test5(ptr %x) nounwind {
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entry:
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%tmp0 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %x)
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ret ptr %tmp0
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}
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; Always tail call llvm.objc.unsafeClaimAutoreleasedReturnValue.
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; CHECK: define ptr @test6(ptr %x) [[NUW]] {
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; CHECK: %tmp0 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %y) [[NUW]]
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; CHECK: %tmp1 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %z) [[NUW]]
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; CHECK: }
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define ptr @test6(ptr %x) nounwind {
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entry:
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%y = call ptr @tmp(ptr %x)
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%tmp0 = call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %y)
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%z = call ptr @tmp(ptr %x)
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%tmp1 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %z)
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ret ptr %x
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}
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; CHECK: attributes [[NUW]] = { nounwind }
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