mirror of
https://github.com/c64scene-ar/llvm-6502.git
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f11a6856cc
Turning retains into retainRV calls disrupts the data flow analysis in ObjCARCOpts. Thus we move it as late as we can by moving it into ObjCARCContract. We leave in the conversion from retainRV -> retain in ObjCARCOpt since it enables the dataflow analysis. rdar://10813093 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180698 91177308-0d34-0410-b5e6-96231b3b80d8
295 lines
8.2 KiB
LLVM
295 lines
8.2 KiB
LLVM
; RUN: opt -objc-arc -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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declare i8* @objc_retain(i8*)
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declare i8* @objc_retainAutoreleasedReturnValue(i8*)
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declare void @objc_release(i8*)
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declare i8* @objc_autorelease(i8*)
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declare i8* @objc_autoreleaseReturnValue(i8*)
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declare i8* @objc_retainAutoreleaseReturnValue(i8*)
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declare void @objc_autoreleasePoolPop(i8*)
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declare void @objc_autoreleasePoolPush()
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declare i8* @objc_retainBlock(i8*)
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declare i8* @objc_retainedObject(i8*)
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declare i8* @objc_unretainedObject(i8*)
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declare i8* @objc_unretainedPointer(i8*)
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declare void @use_pointer(i8*)
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declare void @callee()
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declare void @callee_fnptr(void ()*)
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declare void @invokee()
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declare i8* @returner()
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; Test that retain+release elimination is suppressed when the
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; retain is an objc_retainAutoreleasedReturnValue, since it's
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; better to do the RV optimization.
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; CHECK: define void @test0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %x = call i8* @returner
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; CHECK-NEXT: %0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %x) [[NUW:#[0-9]+]]
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; CHECK: t:
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; CHECK-NOT: @objc_
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; CHECK: return:
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; CHECK-NEXT: call void @objc_release(i8* %x)
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; CHECK-NEXT: ret void
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; CHECK-NEXT: }
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define void @test0(i1 %p) nounwind {
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entry:
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%x = call i8* @returner()
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%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %x)
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br i1 %p, label %t, label %return
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t:
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call void @use_pointer(i8* %x)
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store i8 0, i8* %x
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br label %return
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return:
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call void @objc_release(i8* %x) nounwind
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ret void
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}
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; Delete no-ops.
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; CHECK: define void @test2
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; CHECK-NOT: @objc_
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; CHECK: }
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define void @test2() {
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call i8* @objc_retainAutoreleasedReturnValue(i8* null)
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call i8* @objc_autoreleaseReturnValue(i8* null)
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; call i8* @objc_retainAutoreleaseReturnValue(i8* null) ; TODO
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ret void
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}
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; Delete a redundant retainRV,autoreleaseRV when forwaring a call result
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; directly to a return value.
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; CHECK: define i8* @test3
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; CHECK: call i8* @returner()
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; CHECK-NEXT: ret i8* %call
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define i8* @test3() {
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entry:
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%call = call i8* @returner()
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%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
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%1 = call i8* @objc_autoreleaseReturnValue(i8* %0) nounwind
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ret i8* %1
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}
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; Delete a redundant retain,autoreleaseRV when forwaring a call result
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; directly to a return value.
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; CHECK: define i8* @test4
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; CHECK: call i8* @returner()
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; CHECK-NEXT: ret i8* %call
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define i8* @test4() {
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entry:
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%call = call i8* @returner()
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%0 = call i8* @objc_retain(i8* %call) nounwind
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%1 = call i8* @objc_autoreleaseReturnValue(i8* %0) nounwind
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ret i8* %1
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}
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; Delete a redundant fused retain+autoreleaseRV when forwaring a call result
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; directly to a return value.
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; TODO
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; HECK: define i8* @test5
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; HECK: call i8* @returner()
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; HECK-NEXT: ret i8* %call
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;define i8* @test5() {
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;entry:
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; %call = call i8* @returner()
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; %0 = call i8* @objc_retainAutoreleaseReturnValue(i8* %call) nounwind
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; ret i8* %0
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;}
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; Don't eliminate objc_retainAutoreleasedReturnValue by merging it into
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; an objc_autorelease.
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; TODO? Merge objc_retainAutoreleasedReturnValue and objc_autorelease into
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; objc_retainAutoreleasedReturnValueAutorelease and merge
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; objc_retainAutoreleasedReturnValue and objc_autoreleaseReturnValue
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; into objc_retainAutoreleasedReturnValueAutoreleaseReturnValue?
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; Those entrypoints don't exist yet though.
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; CHECK: define i8* @test7(
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; CHECK: call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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; CHECK: %t = tail call i8* @objc_autoreleaseReturnValue(i8* %p)
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define i8* @test7() {
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%p = call i8* @returner()
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call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
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call void @use_pointer(i8* %p)
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ret i8* %t
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}
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; CHECK: define i8* @test7b(
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; CHECK: call i8* @objc_retain(i8* %p)
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; CHECK: %t = tail call i8* @objc_autoreleaseReturnValue(i8* %p)
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define i8* @test7b() {
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%p = call i8* @returner()
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call void @use_pointer(i8* %p)
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call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
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ret i8* %p
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}
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; Don't apply the RV optimization to autorelease if there's no retain.
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; CHECK: define i8* @test9(i8* %p)
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; CHECK: call i8* @objc_autorelease(i8* %p)
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define i8* @test9(i8* %p) {
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call i8* @objc_autorelease(i8* %p)
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ret i8* %p
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}
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; Do not apply the RV optimization.
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; CHECK: define i8* @test10(i8* %p)
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; CHECK: tail call i8* @objc_retain(i8* %p) [[NUW]]
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; CHECK: call i8* @objc_autorelease(i8* %p) [[NUW]]
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; CHECK-NEXT: ret i8* %p
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define i8* @test10(i8* %p) {
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%1 = call i8* @objc_retain(i8* %p)
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%2 = call i8* @objc_autorelease(i8* %p)
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ret i8* %p
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}
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; Don't do the autoreleaseRV optimization because @use_pointer
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; could undo the retain.
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; CHECK: define i8* @test11(i8* %p)
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; CHECK: tail call i8* @objc_retain(i8* %p)
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; CHECK-NEXT: call void @use_pointer(i8* %p)
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; CHECK: call i8* @objc_autorelease(i8* %p)
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; CHECK-NEXT: ret i8* %p
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define i8* @test11(i8* %p) {
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%1 = call i8* @objc_retain(i8* %p)
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call void @use_pointer(i8* %p)
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%2 = call i8* @objc_autorelease(i8* %p)
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ret i8* %p
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}
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; Don't spoil the RV optimization.
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; CHECK: define i8* @test12(i8* %p)
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; CHECK: tail call i8* @objc_retain(i8* %p)
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; CHECK: call void @use_pointer(i8* %p)
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; CHECK: tail call i8* @objc_autoreleaseReturnValue(i8* %p)
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; CHECK: ret i8* %p
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define i8* @test12(i8* %p) {
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%1 = call i8* @objc_retain(i8* %p)
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call void @use_pointer(i8* %p)
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%2 = call i8* @objc_autoreleaseReturnValue(i8* %p)
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ret i8* %p
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}
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; Don't zap the objc_retainAutoreleasedReturnValue.
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; CHECK: define i8* @test13(
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; CHECK: tail call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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; CHECK: call i8* @objc_autorelease(i8* %p)
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; CHECK: ret i8* %p
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define i8* @test13() {
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%p = call i8* @returner()
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%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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call void @callee()
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%2 = call i8* @objc_autorelease(i8* %p)
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ret i8* %p
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}
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; Convert objc_retainAutoreleasedReturnValue to objc_retain if its
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; argument is not a return value.
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; CHECK: define void @test14(
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; CHECK-NEXT: tail call i8* @objc_retain(i8* %p) [[NUW]]
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; CHECK-NEXT: ret void
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define void @test14(i8* %p) {
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call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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ret void
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}
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; Don't convert objc_retainAutoreleasedReturnValue to objc_retain if its
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; argument is a return value.
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; CHECK: define void @test15(
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; CHECK-NEXT: %y = call i8* @returner()
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; CHECK-NEXT: tail call i8* @objc_retainAutoreleasedReturnValue(i8* %y) [[NUW]]
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; CHECK-NEXT: ret void
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define void @test15() {
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%y = call i8* @returner()
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call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
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ret void
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}
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; Delete autoreleaseRV+retainRV pairs.
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; CHECK: define i8* @test19(i8* %p) {
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; CHECK-NEXT: ret i8* %p
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define i8* @test19(i8* %p) {
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call i8* @objc_autoreleaseReturnValue(i8* %p)
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call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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ret i8* %p
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}
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; Like test19 but with plain autorelease.
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; CHECK: define i8* @test20(i8* %p) {
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; CHECK-NEXT: call i8* @objc_autorelease(i8* %p)
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; CHECK-NEXT: call i8* @objc_retain(i8* %p)
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; CHECK-NEXT: ret i8* %p
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define i8* @test20(i8* %p) {
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call i8* @objc_autorelease(i8* %p)
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call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
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ret i8* %p
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}
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; Like test19 but with plain retain.
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; CHECK: define i8* @test21(i8* %p) {
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; CHECK-NEXT: call i8* @objc_autoreleaseReturnValue(i8* %p)
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; CHECK-NEXT: call i8* @objc_retain(i8* %p)
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; CHECK-NEXT: ret i8* %p
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define i8* @test21(i8* %p) {
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call i8* @objc_autoreleaseReturnValue(i8* %p)
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call i8* @objc_retain(i8* %p)
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ret i8* %p
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}
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; Like test19 but with plain retain and autorelease.
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; CHECK: define i8* @test22(i8* %p) {
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; CHECK-NEXT: call i8* @objc_autorelease(i8* %p)
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; CHECK-NEXT: call i8* @objc_retain(i8* %p)
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; CHECK-NEXT: ret i8* %p
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define i8* @test22(i8* %p) {
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call i8* @objc_autorelease(i8* %p)
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call i8* @objc_retain(i8* %p)
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ret i8* %p
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}
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; Convert autoreleaseRV to autorelease.
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; CHECK: define void @test23(
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; CHECK: call i8* @objc_autorelease(i8* %p) [[NUW]]
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define void @test23(i8* %p) {
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store i8 0, i8* %p
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call i8* @objc_autoreleaseReturnValue(i8* %p)
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ret void
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}
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; Don't convert autoreleaseRV to autorelease if the result is returned,
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; even through a bitcast.
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; CHECK: define {}* @test24(
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; CHECK: tail call i8* @objc_autoreleaseReturnValue(i8* %p)
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define {}* @test24(i8* %p) {
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%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
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%s = bitcast i8* %p to {}*
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ret {}* %s
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}
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; CHECK: attributes [[NUW]] = { nounwind }
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