Commit 68f39de0 authored by Francis Visoiu Mistrih's avatar Francis Visoiu Mistrih
Browse files

[NFC][ObjC][ARC] Add tests for OptimizeRetainRVCall 

Add tests for bitcasts + zero GEPs, and pre-commit tests for lifetime
markers.
parent 0016c1f4

llvm/test/Transforms/ObjCARC/post-inlining.ll

+68 −0
Original line number Diff line number Diff line
@@ -46,3 +46,71 @@ entry: 
  call void @use_pointer(i8* %p)

  ret void

}



; Check that we can delete the autoreleaseRV+retainAutoreleasedRV pair even in

; presence of instructions added by the inliner as part of the return sequence.



; 1) Noop instructions: bitcasts and zero-indices GEPs.



; CHECK-LABEL: define i8* @testNoop(

; CHECK: entry:

; CHECK-NEXT: %noop0 = bitcast i8* %call.i to i64*

; CHECK-NEXT: %noop1 = getelementptr i8, i8* %call.i, i32 0

; CHECK-NEXT: ret i8* %call.i

; CHECK-NEXT: }

define i8* @testNoop(i8* %call.i) {

entry:

  %0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind

  %noop0 = bitcast i8* %call.i to i64*

  %noop1 = getelementptr i8, i8* %call.i, i32 0

  %1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind

  ret i8* %call.i

}



; 2) Lifetime markers.



declare void @llvm.lifetime.start.p0i8(i64, i8*)

declare void @llvm.lifetime.end.p0i8(i64, i8*)



; CHECK-LABEL: define i8* @testLifetime(

; CHECK: entry:

; CHECK-NEXT: %obj = alloca i8

; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 8, i8* %obj)

; CHECK-NEXT: %0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i)

; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 8, i8* %obj)

; CHECK-NEXT: %1 = tail call i8* @llvm.objc.retain(i8* %call.i)

; CHECK-NEXT: ret i8* %call.i

; CHECK-NEXT: }

define i8* @testLifetime(i8* %call.i) {

entry:

  %obj = alloca i8

  call void @llvm.lifetime.start.p0i8(i64 8, i8* %obj)

  %0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind

  call void @llvm.lifetime.end.p0i8(i64 8, i8* %obj)

  %1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind

  ret i8* %call.i

}



; 3) Dynamic alloca markers.



declare i8* @llvm.stacksave()

declare void @llvm.stackrestore(i8*)



; CHECK-LABEL: define i8* @testStack(

; CHECK: entry:

; CHECK-NEXT: %save = tail call i8* @llvm.stacksave()

; CHECK-NEXT: %obj = alloca i8, i8 %arg

; CHECK-NEXT: %0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i)

; CHECK-NEXT: call void @llvm.stackrestore(i8* %save)

; CHECK-NEXT: %1 = tail call i8* @llvm.objc.retain(i8* %call.i)

; CHECK-NEXT: ret i8* %call.i

; CHECK-NEXT: }

define i8* @testStack(i8* %call.i, i8 %arg) {

entry:

  %save = tail call i8* @llvm.stacksave()

  %obj = alloca i8, i8 %arg

  %0 = tail call i8* @llvm.objc.autoreleaseReturnValue(i8* %call.i) nounwind

  call void @llvm.stackrestore(i8* %save)

  %1 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call.i) nounwind

  ret i8* %call.i

}