58 lines
1.8 KiB
LLVM
58 lines
1.8 KiB
LLVM
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; RUN: opt -S -passes=objc-arc < %s | FileCheck %s
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; rdar://10210274
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%0 = type opaque
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declare ptr @llvm.objc.retain(ptr)
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declare void @llvm.objc.release(ptr)
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declare ptr @llvm.objc.autoreleaseReturnValue(ptr)
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; Don't delete the autorelease.
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; CHECK-LABEL: define ptr @test0(
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; CHECK: @llvm.objc.retain
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; CHECK: .lr.ph:
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; CHECK-NOT: @llvm.objc.r
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; CHECK: @llvm.objc.autoreleaseReturnValue
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; CHECK-NOT: @llvm.objc.
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; CHECK: }
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define ptr @test0(ptr %buffer) nounwind {
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%1 = tail call ptr @llvm.objc.retain(ptr %buffer) 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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%2 = tail call ptr @llvm.objc.retain(ptr %buffer) nounwind
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tail call void @llvm.objc.release(ptr %buffer) nounwind, !clang.imprecise_release !0
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%3 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %buffer) nounwind
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ret ptr %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-LABEL: define ptr @test1(
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; CHECK-NOT: @objc
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; CHECK: }
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define ptr @test1() nounwind {
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%buffer = call ptr @foo()
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%1 = tail call ptr @llvm.objc.retain(ptr %buffer) 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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%2 = tail call ptr @llvm.objc.retain(ptr %buffer) nounwind
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tail call void @llvm.objc.release(ptr %buffer) nounwind, !clang.imprecise_release !0
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%3 = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr %buffer) nounwind
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ret ptr %buffer
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}
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declare ptr @foo()
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!0 = !{}
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