2020-06-27 05:41:37 +02:00
|
|
|
; RUN: opt -S -basic-aa -objc-arc < %s | FileCheck %s
|
2019-04-17 06:52:47 +02:00
|
|
|
|
|
|
|
|
declare i8* @llvm.objc.loadWeak(i8**)
|
|
|
|
|
declare i8* @llvm.objc.loadWeakRetained(i8**)
|
|
|
|
|
declare i8* @llvm.objc.storeWeak(i8**, i8*)
|
|
|
|
|
declare i8* @llvm.objc.initWeak(i8**, i8*)
|
|
|
|
|
declare void @use_pointer(i8*)
|
|
|
|
|
declare void @callee()
|
|
|
|
|
|
|
|
|
|
; Basic redundant @llvm.objc.loadWeak elimination.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test0(i8** %p) {
|
|
|
|
|
; CHECK-NEXT: %y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %y)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test0(i8** %p) {
|
|
|
|
|
%x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; DCE the @llvm.objc.loadWeak.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test1(i8** %p) {
|
|
|
|
|
; CHECK-NEXT: %y = call i8* @llvm.objc.loadWeakRetained(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %y)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test1(i8** %p) {
|
|
|
|
|
%x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeakRetained(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Basic redundant @llvm.objc.loadWeakRetained elimination.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test2(i8** %p) {
|
|
|
|
|
; CHECK-NEXT: %x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: store i8 3, i8* %x
|
|
|
|
|
; CHECK-NEXT: %1 = tail call i8* @llvm.objc.retain(i8* %x)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %x)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test2(i8** %p) {
|
|
|
|
|
%x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
store i8 3, i8* %x
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeakRetained(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Basic redundant @llvm.objc.loadWeakRetained elimination, this time
|
|
|
|
|
; with a readonly call instead of a store.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test3(i8** %p) {
|
|
|
|
|
; CHECK-NEXT: %x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %x) [[RO:#[0-9]+]]
|
|
|
|
|
; CHECK-NEXT: %1 = tail call i8* @llvm.objc.retain(i8* %x)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %x)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test3(i8** %p) {
|
|
|
|
|
%x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %x) readonly
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeakRetained(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; A regular call blocks redundant weak load elimination.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test4(i8** %p) {
|
|
|
|
|
; CHECK-NEXT: %x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %x) [[RO]]
|
|
|
|
|
; CHECK-NEXT: call void @callee()
|
|
|
|
|
; CHECK-NEXT: %y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %y)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test4(i8** %p) {
|
|
|
|
|
%x = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %x) readonly
|
|
|
|
|
call void @callee()
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Store to load forwarding.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test5(i8** %p, i8* %n) {
|
|
|
|
|
; CHECK-NEXT: %1 = call i8* @llvm.objc.storeWeak(i8** %p, i8* %n)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %n)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test5(i8** %p, i8* %n) {
|
|
|
|
|
call i8* @llvm.objc.storeWeak(i8** %p, i8* %n)
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Store to load forwarding with objc_initWeak.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test6(i8** %p, i8* %n) {
|
|
|
|
|
; CHECK-NEXT: %1 = call i8* @llvm.objc.initWeak(i8** %p, i8* %n)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %n)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test6(i8** %p, i8* %n) {
|
|
|
|
|
call i8* @llvm.objc.initWeak(i8** %p, i8* %n)
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; Don't forward if there's a may-alias store in the way.
|
|
|
|
|
|
|
|
|
|
; CHECK: define void @test7(i8** %p, i8* %n, i8** %q, i8* %m) {
|
|
|
|
|
; CHECK-NEXT: call i8* @llvm.objc.initWeak(i8** %p, i8* %n)
|
|
|
|
|
; CHECK-NEXT: call i8* @llvm.objc.storeWeak(i8** %q, i8* %m)
|
|
|
|
|
; CHECK-NEXT: %y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
; CHECK-NEXT: call void @use_pointer(i8* %y)
|
|
|
|
|
; CHECK-NEXT: ret void
|
|
|
|
|
; CHECK-NEXT: }
|
|
|
|
|
define void @test7(i8** %p, i8* %n, i8** %q, i8* %m) {
|
|
|
|
|
call i8* @llvm.objc.initWeak(i8** %p, i8* %n)
|
|
|
|
|
call i8* @llvm.objc.storeWeak(i8** %q, i8* %m)
|
|
|
|
|
%y = call i8* @llvm.objc.loadWeak(i8** %p)
|
|
|
|
|
call void @use_pointer(i8* %y)
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
; CHECK: attributes #0 = { nounwind }
|
|
|
|
|
; CHECK: attributes [[RO]] = { readonly }
|
