weak-dce.ll
1.6 KB
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; RUN: opt -S -basicaa -objc-arc < %s | FileCheck %s
; rdar://11434915
; Delete the weak calls and replace them with just the net retain.
; CHECK: define void @test0(i8* %p) {
; CHECK-NEXT: call i8* @llvm.objc.retain(i8* %p)
; CHECK-NEXT: ret void
define void @test0(i8* %p) {
%weakBlock = alloca i8*, align 8
%tmp7 = call i8* @llvm.objc.initWeak(i8** %weakBlock, i8* %p) nounwind
%tmp26 = call i8* @llvm.objc.loadWeakRetained(i8** %weakBlock) nounwind
call void @llvm.objc.destroyWeak(i8** %weakBlock) nounwind
ret void
}
; CHECK: define i8* @test1(i8* %p) {
; CHECK-NEXT: call i8* @llvm.objc.retain(i8* %p)
; CHECK-NEXT: ret i8* %p
define i8* @test1(i8* %p) {
%weakBlock = alloca i8*, align 8
%tmp7 = call i8* @llvm.objc.initWeak(i8** %weakBlock, i8* %p) nounwind
%tmp26 = call i8* @llvm.objc.loadWeakRetained(i8** %weakBlock) nounwind
call void @llvm.objc.destroyWeak(i8** %weakBlock) nounwind
ret i8* %tmp26
}
; CHECK: define i8* @test2(i8* %p, i8* %q) {
; CHECK-NEXT: call i8* @llvm.objc.retain(i8* %q)
; CHECK-NEXT: ret i8* %q
define i8* @test2(i8* %p, i8* %q) {
%weakBlock = alloca i8*, align 8
%tmp7 = call i8* @llvm.objc.initWeak(i8** %weakBlock, i8* %p) nounwind
%tmp19 = call i8* @llvm.objc.storeWeak(i8** %weakBlock, i8* %q) nounwind
%tmp26 = call i8* @llvm.objc.loadWeakRetained(i8** %weakBlock) nounwind
call void @llvm.objc.destroyWeak(i8** %weakBlock) nounwind
ret i8* %tmp26
}
declare i8* @llvm.objc.initWeak(i8**, i8*)
declare void @llvm.objc.destroyWeak(i8**)
declare i8* @llvm.objc.loadWeakRetained(i8**)
declare i8* @llvm.objc.storeWeak(i8** %weakBlock, i8* %q)