113 lines
3.4 KiB
LLVM
113 lines
3.4 KiB
LLVM
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; RUN: opt -S -objc-arc < %s | FileCheck %s
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declare void @use_pointer(i8*)
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declare i8* @returner()
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declare i8* @llvm.objc.retain(i8*)
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declare i8* @llvm.objc.autoreleaseReturnValue(i8*)
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declare i8* @llvm.objc.retainAutoreleasedReturnValue(i8*)
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; Clean up residue left behind after inlining.
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; CHECK-LABEL: define void @test0(
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; CHECK: entry:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test0(i8* %call.i) {
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entry:
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%0 = tail call i8* @llvm.objc.retain(i8* %call.i) nounwind
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%1 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %0) nounwind
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ret void
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}
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; Same as test0, but with slightly different use arrangements.
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; CHECK-LABEL: define void @test1(
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; CHECK: entry:
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test1(i8* %call.i) {
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entry:
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%0 = tail call i8* @llvm.objc.retain(i8* %call.i) nounwind
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%1 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind
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ret void
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}
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; Delete a retainRV+autoreleaseRV even if the pointer is used.
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; CHECK-LABEL: define void @test24(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @use_pointer(i8* %p)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test24(i8* %p) {
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entry:
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call i8* @llvm.objc.autoreleaseReturnValue(i8* %p) nounwind
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call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %p) nounwind
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call void @use_pointer(i8* %p)
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ret void
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}
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; Check that we can delete the autoreleaseRV+retainAutoreleasedRV pair even in
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; presence of instructions added by the inliner as part of the return sequence.
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; 1) Noop instructions: bitcasts and zero-indices GEPs.
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; CHECK-LABEL: define i8* @testNoop(
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; CHECK: entry:
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; CHECK-NEXT: %noop0 = bitcast i8* %call.i to i64*
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; CHECK-NEXT: %noop1 = getelementptr i8, i8* %call.i, i32 0
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; CHECK-NEXT: ret i8* %call.i
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; CHECK-NEXT: }
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define i8* @testNoop(i8* %call.i) {
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entry:
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%0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind
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%noop0 = bitcast i8* %call.i to i64*
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%noop1 = getelementptr i8, i8* %call.i, i32 0
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%1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind
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ret i8* %call.i
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}
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; 2) Lifetime markers.
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declare void @llvm.lifetime.start.p0i8(i64, i8*)
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declare void @llvm.lifetime.end.p0i8(i64, i8*)
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; CHECK-LABEL: define i8* @testLifetime(
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; CHECK: entry:
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; CHECK-NEXT: %obj = alloca i8
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; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* %obj)
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* %obj)
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; CHECK-NEXT: ret i8* %call.i
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; CHECK-NEXT: }
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define i8* @testLifetime(i8* %call.i) {
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entry:
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%obj = alloca i8
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call void @llvm.lifetime.start.p0i8(i64 8, i8* %obj)
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%0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind
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call void @llvm.lifetime.end.p0i8(i64 8, i8* %obj)
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%1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind
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ret i8* %call.i
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}
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; 3) Dynamic alloca markers.
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declare i8* @llvm.stacksave()
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declare void @llvm.stackrestore(i8*)
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; CHECK-LABEL: define i8* @testStack(
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; CHECK: entry:
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; CHECK-NEXT: %save = tail call i8* @llvm.stacksave()
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; CHECK-NEXT: %obj = alloca i8, i8 %arg
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; CHECK-NEXT: call void @llvm.stackrestore(i8* %save)
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; CHECK-NEXT: ret i8* %call.i
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; CHECK-NEXT: }
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define i8* @testStack(i8* %call.i, i8 %arg) {
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entry:
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%save = tail call i8* @llvm.stacksave()
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%obj = alloca i8, i8 %arg
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%0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind
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call void @llvm.stackrestore(i8* %save)
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%1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind
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ret i8* %call.i
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}
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