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27e0666725
handle the case where the retain is in a different basic block. rdar://10210274. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
60 lines
1.7 KiB
LLVM
60 lines
1.7 KiB
LLVM
; RUN: opt -S -objc-arc < %s | FileCheck %s
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; rdar://10210274
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%0 = type opaque
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declare i8* @objc_retain(i8*)
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declare void @objc_release(i8*)
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declare i8* @objc_autoreleaseReturnValue(i8*)
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; Don't delete the autorelease.
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; CHECK: define %0* @test0(
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; CHECK: @objc_retain
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; CHECK: .lr.ph:
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; CHECK-NOT: @objc_r
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; CHECK: @objc_autoreleaseReturnValue
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; CHECK-NOT: @objc_
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; CHECK: }
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define %0* @test0(%0* %buffer) nounwind {
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%1 = bitcast %0* %buffer to i8*
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%2 = tail call i8* @objc_retain(i8* %1) nounwind
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br i1 undef, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %.lr.ph, %0
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br i1 false, label %.lr.ph, label %._crit_edge
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._crit_edge: ; preds = %.lr.ph, %0
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%3 = tail call i8* @objc_retain(i8* %1) nounwind
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tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
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%4 = tail call i8* @objc_autoreleaseReturnValue(i8* %1) nounwind
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ret %0* %buffer
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}
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; Do delete the autorelease, even with the retain in a different block.
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; CHECK: define %0* @test1(
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; CHECK-NOT: @objc
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; CHECK: }
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define %0* @test1() nounwind {
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%buffer = call %0* @foo()
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%1 = bitcast %0* %buffer to i8*
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%2 = tail call i8* @objc_retain(i8* %1) nounwind
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br i1 undef, label %.lr.ph, label %._crit_edge
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.lr.ph: ; preds = %.lr.ph, %0
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br i1 false, label %.lr.ph, label %._crit_edge
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._crit_edge: ; preds = %.lr.ph, %0
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%3 = tail call i8* @objc_retain(i8* %1) nounwind
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tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
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%4 = tail call i8* @objc_autoreleaseReturnValue(i8* %1) nounwind
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ret %0* %buffer
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}
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declare %0* @foo()
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!0 = metadata !{}
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