131 lines
5 KiB
LLVM
131 lines
5 KiB
LLVM
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; RUN: opt -passes=objc-arc -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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declare ptr @llvm.objc.retain(ptr)
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declare ptr @llvm.objc.retainAutorelease(ptr)
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declare void @llvm.objc.release(ptr)
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declare ptr @llvm.objc.autorelease(ptr)
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declare void @llvm.objc.clang.arc.use(...)
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declare void @llvm.objc.clang.arc.noop.use(...)
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declare void @test0_helper(ptr, ptr)
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declare void @can_release(ptr)
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; Ensure that we honor clang.arc.use as a use and don't miscompile
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; the reduced test case from <rdar://13195034>.
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;
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; CHECK-LABEL: define void @test0(
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; CHECK: @llvm.objc.retain(ptr %x)
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; CHECK-NEXT: store ptr %y, ptr %temp0
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; CHECK-NEXT: @llvm.objc.retain(ptr %y)
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; CHECK-NEXT: call void @test0_helper
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; CHECK-NEXT: [[VAL1:%.*]] = load ptr, ptr %temp0
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; CHECK-NEXT: @llvm.objc.retain(ptr [[VAL1]])
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; CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr %y)
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; CHECK-NEXT: @llvm.objc.release(ptr %y)
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; CHECK-NEXT: store ptr [[VAL1]], ptr %temp1
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; CHECK-NEXT: call void @test0_helper
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; CHECK-NEXT: [[VAL2:%.*]] = load ptr, ptr %temp1
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; CHECK-NEXT: @llvm.objc.retain(ptr [[VAL2]])
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; CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[VAL1]])
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; CHECK-NEXT: @llvm.objc.release(ptr [[VAL1]])
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; CHECK-NEXT: @llvm.objc.autorelease(ptr %x)
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; CHECK-NEXT: store ptr %x, ptr %out
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; CHECK-NEXT: @llvm.objc.retain(ptr %x)
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; CHECK-NEXT: @llvm.objc.release(ptr [[VAL2]])
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; CHECK-NEXT: @llvm.objc.release(ptr %x)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test0(ptr %out, ptr %x, ptr %y) {
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entry:
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%temp0 = alloca ptr, align 8
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%temp1 = alloca ptr, align 8
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%0 = call ptr @llvm.objc.retain(ptr %x) nounwind
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%1 = call ptr @llvm.objc.retain(ptr %y) nounwind
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store ptr %y, ptr %temp0
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call void @test0_helper(ptr %x, ptr %temp0)
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%val1 = load ptr, ptr %temp0
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%2 = call ptr @llvm.objc.retain(ptr %val1) nounwind
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call void (...) @llvm.objc.clang.arc.use(ptr %y) nounwind
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call void @llvm.objc.release(ptr %y) nounwind
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store ptr %val1, ptr %temp1
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call void @test0_helper(ptr %x, ptr %temp1)
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%val2 = load ptr, ptr %temp1
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%3 = call ptr @llvm.objc.retain(ptr %val2) nounwind
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call void (...) @llvm.objc.clang.arc.use(ptr %val1) nounwind
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call void @llvm.objc.release(ptr %val1) nounwind
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%4 = call ptr @llvm.objc.retain(ptr %x) nounwind
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%5 = call ptr @llvm.objc.autorelease(ptr %x) nounwind
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store ptr %x, ptr %out
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call void @llvm.objc.release(ptr %val2) nounwind
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call void @llvm.objc.release(ptr %x) nounwind
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ret void
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}
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; CHECK-LABEL: define void @test0a(
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; CHECK: @llvm.objc.retain(ptr %x)
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; CHECK-NEXT: store ptr %y, ptr %temp0
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; CHECK-NEXT: @llvm.objc.retain(ptr %y)
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; CHECK-NEXT: call void @test0_helper
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; CHECK-NEXT: [[VAL1:%.*]] = load ptr, ptr %temp0
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; CHECK-NEXT: @llvm.objc.retain(ptr [[VAL1]])
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; CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr %y)
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; CHECK-NEXT: @llvm.objc.release(ptr %y)
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; CHECK-NEXT: store ptr [[VAL1]], ptr %temp1
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; CHECK-NEXT: call void @test0_helper
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; CHECK-NEXT: [[VAL2:%.*]] = load ptr, ptr %temp1
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; CHECK-NEXT: @llvm.objc.retain(ptr [[VAL2]])
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; CHECK-NEXT: call void (...) @llvm.objc.clang.arc.use(ptr [[VAL1]])
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; CHECK-NEXT: @llvm.objc.release(ptr [[VAL1]])
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; CHECK-NEXT: @llvm.objc.autorelease(ptr %x)
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; CHECK-NEXT: @llvm.objc.release(ptr [[VAL2]])
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; CHECK-NEXT: store ptr %x, ptr %out
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test0a(ptr %out, ptr %x, ptr %y) {
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entry:
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%temp0 = alloca ptr, align 8
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%temp1 = alloca ptr, align 8
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%0 = call ptr @llvm.objc.retain(ptr %x) nounwind
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%1 = call ptr @llvm.objc.retain(ptr %y) nounwind
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store ptr %y, ptr %temp0
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call void @test0_helper(ptr %x, ptr %temp0)
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%val1 = load ptr, ptr %temp0
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%2 = call ptr @llvm.objc.retain(ptr %val1) nounwind
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call void (...) @llvm.objc.clang.arc.use(ptr %y) nounwind
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call void @llvm.objc.release(ptr %y) nounwind, !clang.imprecise_release !0
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store ptr %val1, ptr %temp1
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call void @test0_helper(ptr %x, ptr %temp1)
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%val2 = load ptr, ptr %temp1
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%3 = call ptr @llvm.objc.retain(ptr %val2) nounwind
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call void (...) @llvm.objc.clang.arc.use(ptr %val1) nounwind
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call void @llvm.objc.release(ptr %val1) nounwind, !clang.imprecise_release !0
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%4 = call ptr @llvm.objc.retain(ptr %x) nounwind
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%5 = call ptr @llvm.objc.autorelease(ptr %x) nounwind
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store ptr %x, ptr %out
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call void @llvm.objc.release(ptr %val2) nounwind, !clang.imprecise_release !0
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call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0
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ret void
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}
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; ARC optimizer should be able to safely remove the retain/release pair as the
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; call to @llvm.objc.clang.arc.noop.use is a no-op.
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; CHECK-LABEL: define void @test_arc_noop_use(
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; CHECK-NEXT: call void @can_release(ptr %x)
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; CHECK-NEXT: call void (...) @llvm.objc.clang.arc.noop.use(
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; CHECK-NEXT: ret void
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define void @test_arc_noop_use(ptr %out, ptr %x) {
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call ptr @llvm.objc.retain(ptr %x)
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call void @can_release(ptr %x)
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call void (...) @llvm.objc.clang.arc.noop.use(ptr %x)
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call void @llvm.objc.release(ptr %x), !clang.imprecise_release !0
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ret void
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}
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!0 = !{}
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