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|
; RUN: opt -objc-arc -S < %s | FileCheck %s
target datalayout = "e-p:64:64:64"
declare i8* @objc_retain(i8*)
declare i8* @objc_retainAutoreleasedReturnValue(i8*)
declare void @objc_release(i8*)
declare i8* @objc_autorelease(i8*)
declare i8* @objc_autoreleaseReturnValue(i8*)
declare i8* @objc_retainAutoreleaseReturnValue(i8*)
declare void @objc_autoreleasePoolPop(i8*)
declare void @objc_autoreleasePoolPush()
declare i8* @objc_retainBlock(i8*)
declare i8* @objc_retainedObject(i8*)
declare i8* @objc_unretainedObject(i8*)
declare i8* @objc_unretainedPointer(i8*)
declare void @use_pointer(i8*)
declare void @callee()
declare void @callee_fnptr(void ()*)
declare void @invokee()
declare i8* @returner()
; Test that retain+release elimination is suppressed when the
; retain is an objc_retainAutoreleasedReturnValue, since it's
; better to do the RV optimization.
; CHECK-LABEL: define void @test0(
; CHECK-NEXT: entry:
; CHECK-NEXT: %x = call i8* @returner
; CHECK-NEXT: %0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %x) [[NUW:#[0-9]+]]
; CHECK: t:
; CHECK-NOT: @objc_
; CHECK: return:
; CHECK-NEXT: call void @objc_release(i8* %x)
; CHECK-NEXT: ret void
; CHECK-NEXT: }
define void @test0(i1 %p) nounwind {
entry:
%x = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %x)
br i1 %p, label %t, label %return
t:
call void @use_pointer(i8* %x)
store i8 0, i8* %x
br label %return
return:
call void @objc_release(i8* %x) nounwind
ret void
}
; Delete no-ops.
; CHECK-LABEL: define void @test2(
; CHECK-NOT: @objc_
; CHECK: }
define void @test2() {
call i8* @objc_retainAutoreleasedReturnValue(i8* null)
call i8* @objc_autoreleaseReturnValue(i8* null)
; call i8* @objc_retainAutoreleaseReturnValue(i8* null) ; TODO
ret void
}
; Delete a redundant retainRV,autoreleaseRV when forwaring a call result
; directly to a return value.
; CHECK-LABEL: define i8* @test3(
; CHECK: call i8* @returner()
; CHECK-NEXT: ret i8* %call
define i8* @test3() {
entry:
%call = call i8* @returner()
%0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %call) nounwind
%1 = call i8* @objc_autoreleaseReturnValue(i8* %0) nounwind
ret i8* %1
}
; Delete a redundant retain,autoreleaseRV when forwaring a call result
; directly to a return value.
; CHECK-LABEL: define i8* @test4(
; CHECK: call i8* @returner()
; CHECK-NEXT: ret i8* %call
define i8* @test4() {
entry:
%call = call i8* @returner()
%0 = call i8* @objc_retain(i8* %call) nounwind
%1 = call i8* @objc_autoreleaseReturnValue(i8* %0) nounwind
ret i8* %1
}
; Delete a redundant fused retain+autoreleaseRV when forwaring a call result
; directly to a return value.
; TODO
; HECK: define i8* @test5
; HECK: call i8* @returner()
; HECK-NEXT: ret i8* %call
;define i8* @test5() {
;entry:
; %call = call i8* @returner()
; %0 = call i8* @objc_retainAutoreleaseReturnValue(i8* %call) nounwind
; ret i8* %0
;}
; Don't eliminate objc_retainAutoreleasedReturnValue by merging it into
; an objc_autorelease.
; TODO? Merge objc_retainAutoreleasedReturnValue and objc_autorelease into
; objc_retainAutoreleasedReturnValueAutorelease and merge
; objc_retainAutoreleasedReturnValue and objc_autoreleaseReturnValue
; into objc_retainAutoreleasedReturnValueAutoreleaseReturnValue?
; Those entrypoints don't exist yet though.
; CHECK-LABEL: define i8* @test7(
; CHECK: call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
; CHECK: %t = tail call i8* @objc_autoreleaseReturnValue(i8* %p)
define i8* @test7() {
%p = call i8* @returner()
call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
call void @use_pointer(i8* %p)
ret i8* %t
}
; CHECK-LABEL: define i8* @test7b(
; CHECK: call i8* @objc_retain(i8* %p)
; CHECK: %t = tail call i8* @objc_autoreleaseReturnValue(i8* %p)
define i8* @test7b() {
%p = call i8* @returner()
call void @use_pointer(i8* %p)
call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
ret i8* %p
}
; Don't apply the RV optimization to autorelease if there's no retain.
; CHECK: define i8* @test9(i8* %p)
; CHECK: call i8* @objc_autorelease(i8* %p)
define i8* @test9(i8* %p) {
call i8* @objc_autorelease(i8* %p)
ret i8* %p
}
; Do not apply the RV optimization.
; CHECK: define i8* @test10(i8* %p)
; CHECK: tail call i8* @objc_retain(i8* %p) [[NUW]]
; CHECK: call i8* @objc_autorelease(i8* %p) [[NUW]]
; CHECK-NEXT: ret i8* %p
define i8* @test10(i8* %p) {
%1 = call i8* @objc_retain(i8* %p)
%2 = call i8* @objc_autorelease(i8* %p)
ret i8* %p
}
; Don't do the autoreleaseRV optimization because @use_pointer
; could undo the retain.
; CHECK: define i8* @test11(i8* %p)
; CHECK: tail call i8* @objc_retain(i8* %p)
; CHECK-NEXT: call void @use_pointer(i8* %p)
; CHECK: call i8* @objc_autorelease(i8* %p)
; CHECK-NEXT: ret i8* %p
define i8* @test11(i8* %p) {
%1 = call i8* @objc_retain(i8* %p)
call void @use_pointer(i8* %p)
%2 = call i8* @objc_autorelease(i8* %p)
ret i8* %p
}
; Don't spoil the RV optimization.
; CHECK: define i8* @test12(i8* %p)
; CHECK: tail call i8* @objc_retain(i8* %p)
; CHECK: call void @use_pointer(i8* %p)
; CHECK: tail call i8* @objc_autoreleaseReturnValue(i8* %p)
; CHECK: ret i8* %p
define i8* @test12(i8* %p) {
%1 = call i8* @objc_retain(i8* %p)
call void @use_pointer(i8* %p)
%2 = call i8* @objc_autoreleaseReturnValue(i8* %p)
ret i8* %p
}
; Don't zap the objc_retainAutoreleasedReturnValue.
; CHECK-LABEL: define i8* @test13(
; CHECK: tail call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
; CHECK: call i8* @objc_autorelease(i8* %p)
; CHECK: ret i8* %p
define i8* @test13() {
%p = call i8* @returner()
%1 = call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
call void @callee()
%2 = call i8* @objc_autorelease(i8* %p)
ret i8* %p
}
; Convert objc_retainAutoreleasedReturnValue to objc_retain if its
; argument is not a return value.
; CHECK-LABEL: define void @test14(
; CHECK-NEXT: tail call i8* @objc_retain(i8* %p) [[NUW]]
; CHECK-NEXT: ret void
define void @test14(i8* %p) {
call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
ret void
}
; Don't convert objc_retainAutoreleasedReturnValue to objc_retain if its
; argument is a return value.
; CHECK-LABEL: define void @test15(
; CHECK-NEXT: %y = call i8* @returner()
; CHECK-NEXT: tail call i8* @objc_retainAutoreleasedReturnValue(i8* %y) [[NUW]]
; CHECK-NEXT: ret void
define void @test15() {
%y = call i8* @returner()
call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
ret void
}
; Delete autoreleaseRV+retainRV pairs.
; CHECK: define i8* @test19(i8* %p) {
; CHECK-NEXT: ret i8* %p
define i8* @test19(i8* %p) {
call i8* @objc_autoreleaseReturnValue(i8* %p)
call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
ret i8* %p
}
; Like test19 but with plain autorelease.
; CHECK: define i8* @test20(i8* %p) {
; CHECK-NEXT: call i8* @objc_autorelease(i8* %p)
; CHECK-NEXT: call i8* @objc_retain(i8* %p)
; CHECK-NEXT: ret i8* %p
define i8* @test20(i8* %p) {
call i8* @objc_autorelease(i8* %p)
call i8* @objc_retainAutoreleasedReturnValue(i8* %p)
ret i8* %p
}
; Like test19 but with plain retain.
; CHECK: define i8* @test21(i8* %p) {
; CHECK-NEXT: call i8* @objc_autoreleaseReturnValue(i8* %p)
; CHECK-NEXT: call i8* @objc_retain(i8* %p)
; CHECK-NEXT: ret i8* %p
define i8* @test21(i8* %p) {
call i8* @objc_autoreleaseReturnValue(i8* %p)
call i8* @objc_retain(i8* %p)
ret i8* %p
}
; Like test19 but with plain retain and autorelease.
; CHECK: define i8* @test22(i8* %p) {
; CHECK-NEXT: call i8* @objc_autorelease(i8* %p)
; CHECK-NEXT: call i8* @objc_retain(i8* %p)
; CHECK-NEXT: ret i8* %p
define i8* @test22(i8* %p) {
call i8* @objc_autorelease(i8* %p)
call i8* @objc_retain(i8* %p)
ret i8* %p
}
; Convert autoreleaseRV to autorelease.
; CHECK-LABEL: define void @test23(
; CHECK: call i8* @objc_autorelease(i8* %p) [[NUW]]
define void @test23(i8* %p) {
store i8 0, i8* %p
call i8* @objc_autoreleaseReturnValue(i8* %p)
ret void
}
; Don't convert autoreleaseRV to autorelease if the result is returned,
; even through a bitcast.
; CHECK-LABEL: define {}* @test24(
; CHECK: tail call i8* @objc_autoreleaseReturnValue(i8* %p)
define {}* @test24(i8* %p) {
%t = call i8* @objc_autoreleaseReturnValue(i8* %p)
%s = bitcast i8* %p to {}*
ret {}* %s
}
; CHECK: attributes [[NUW]] = { nounwind }
|
