; RUN: opt -S -passes=objc-arc < %s | FileCheck %s target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" target triple = "x86_64-apple-darwin11.0.0" %0 = type { i64, i64, ptr, ptr, ptr, ptr } %1 = type <{ ptr, i32, i32, ptr, ptr, ptr }> %struct.__block_descriptor = type { i64, i64 } @_NSConcreteStackBlock = external global ptr @.str = private unnamed_addr constant [6 x i8] c"v8@?0\00" @"\01L_OBJC_CLASS_NAME_" = internal global [3 x i8] c"\01@\00", section "__TEXT,__objc_classname,cstring_literals", align 1 @__block_descriptor_tmp = internal constant %0 { i64 0, i64 40, ptr @__copy_helper_block_, ptr @__destroy_helper_block_, ptr @.str, ptr @"\01L_OBJC_CLASS_NAME_" } @"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip" @llvm.used = appending global [2 x ptr] [ptr @"\01L_OBJC_CLASS_NAME_", ptr @"\01L_OBJC_IMAGE_INFO"], section "llvm.metadata" ; Eliminate unnecessary weak pointer copies. ; CHECK: define void @foo() { ; CHECK-NEXT: entry: ; CHECK-NEXT: %call = call ptr @bar() ; CHECK-NEXT: call void @use(ptr %call) [[NUW:#[0-9]+]] ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @foo() { entry: %w = alloca ptr, align 8 %x = alloca ptr, align 8 %call = call ptr @bar() %0 = call ptr @llvm.objc.initWeak(ptr %w, ptr %call) nounwind %1 = call ptr @llvm.objc.loadWeak(ptr %w) nounwind %2 = call ptr @llvm.objc.initWeak(ptr %x, ptr %1) nounwind %3 = call ptr @llvm.objc.loadWeak(ptr %x) nounwind call void @use(ptr %3) nounwind call void @llvm.objc.destroyWeak(ptr %x) nounwind call void @llvm.objc.destroyWeak(ptr %w) nounwind ret void } ; Eliminate unnecessary weak pointer copies in a block initialization. ; CHECK: define void @qux(ptr %me) #0 { ; CHECK-NEXT: entry: ; CHECK-NEXT: %block = alloca %1, align 8 ; CHECK-NOT: alloca ; CHECK: } define void @qux(ptr %me) nounwind { entry: %w = alloca ptr, align 8 %block = alloca %1, align 8 %0 = call ptr @llvm.objc.retain(ptr %me) nounwind %1 = call ptr @llvm.objc.initWeak(ptr %w, ptr %0) nounwind store ptr @_NSConcreteStackBlock, ptr %block, align 8 %block.flags = getelementptr inbounds %1, ptr %block, i64 0, i32 1 store i32 1107296256, ptr %block.flags, align 8 %block.reserved = getelementptr inbounds %1, ptr %block, i64 0, i32 2 store i32 0, ptr %block.reserved, align 4 %block.invoke = getelementptr inbounds %1, ptr %block, i64 0, i32 3 store ptr @__qux_block_invoke_0, ptr %block.invoke, align 8 %block.descriptor = getelementptr inbounds %1, ptr %block, i64 0, i32 4 store ptr @__block_descriptor_tmp, ptr %block.descriptor, align 8 %block.captured = getelementptr inbounds %1, ptr %block, i64 0, i32 5 %2 = call ptr @llvm.objc.loadWeak(ptr %w) nounwind %3 = call ptr @llvm.objc.initWeak(ptr %block.captured, ptr %2) nounwind call void @use_block(ptr %block) nounwind call void @llvm.objc.destroyWeak(ptr %block.captured) nounwind call void @llvm.objc.destroyWeak(ptr %w) nounwind call void @llvm.objc.release(ptr %0) nounwind, !clang.imprecise_release !0 ret void } declare ptr @llvm.objc.retain(ptr) declare void @use_block(ptr) nounwind declare void @__qux_block_invoke_0(ptr %.block_descriptor) nounwind declare void @__copy_helper_block_(ptr, ptr) nounwind declare void @llvm.objc.copyWeak(ptr, ptr) declare void @__destroy_helper_block_(ptr) nounwind declare void @llvm.objc.release(ptr) declare ptr @bar() declare ptr @llvm.objc.initWeak(ptr, ptr) declare ptr @llvm.objc.loadWeak(ptr) declare void @use(ptr) nounwind declare void @llvm.objc.destroyWeak(ptr) ; CHECK: attributes [[NUW]] = { nounwind } !0 = !{}