88 lines · plain
1; RUN: opt -S -passes=objc-arc < %s | FileCheck %s2 3target 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"4target triple = "x86_64-apple-darwin11.0.0"5 6%0 = type { i64, i64, ptr, ptr, ptr, ptr }7%1 = type <{ ptr, i32, i32, ptr, ptr, ptr }>8%struct.__block_descriptor = type { i64, i64 }9 10@_NSConcreteStackBlock = external global ptr11@.str = private unnamed_addr constant [6 x i8] c"v8@?0\00"12@"\01L_OBJC_CLASS_NAME_" = internal global [3 x i8] c"\01@\00", section "__TEXT,__objc_classname,cstring_literals", align 113@__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_" }14@"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip"15@llvm.used = appending global [2 x ptr] [ptr @"\01L_OBJC_CLASS_NAME_", ptr @"\01L_OBJC_IMAGE_INFO"], section "llvm.metadata"16 17; Eliminate unnecessary weak pointer copies.18 19; CHECK: define void @foo() {20; CHECK-NEXT: entry:21; CHECK-NEXT: %call = call ptr @bar()22; CHECK-NEXT: call void @use(ptr %call) [[NUW:#[0-9]+]]23; CHECK-NEXT: ret void24; CHECK-NEXT: }25define void @foo() {26entry:27 %w = alloca ptr, align 828 %x = alloca ptr, align 829 %call = call ptr @bar()30 %0 = call ptr @llvm.objc.initWeak(ptr %w, ptr %call) nounwind31 %1 = call ptr @llvm.objc.loadWeak(ptr %w) nounwind32 %2 = call ptr @llvm.objc.initWeak(ptr %x, ptr %1) nounwind33 %3 = call ptr @llvm.objc.loadWeak(ptr %x) nounwind34 call void @use(ptr %3) nounwind35 call void @llvm.objc.destroyWeak(ptr %x) nounwind36 call void @llvm.objc.destroyWeak(ptr %w) nounwind37 ret void38}39 40; Eliminate unnecessary weak pointer copies in a block initialization.41 42; CHECK: define void @qux(ptr %me) #0 {43; CHECK-NEXT: entry:44; CHECK-NEXT: %block = alloca %1, align 845; CHECK-NOT: alloca46; CHECK: }47define void @qux(ptr %me) nounwind {48entry:49 %w = alloca ptr, align 850 %block = alloca %1, align 851 %0 = call ptr @llvm.objc.retain(ptr %me) nounwind52 %1 = call ptr @llvm.objc.initWeak(ptr %w, ptr %0) nounwind53 store ptr @_NSConcreteStackBlock, ptr %block, align 854 %block.flags = getelementptr inbounds %1, ptr %block, i64 0, i32 155 store i32 1107296256, ptr %block.flags, align 856 %block.reserved = getelementptr inbounds %1, ptr %block, i64 0, i32 257 store i32 0, ptr %block.reserved, align 458 %block.invoke = getelementptr inbounds %1, ptr %block, i64 0, i32 359 store ptr @__qux_block_invoke_0, ptr %block.invoke, align 860 %block.descriptor = getelementptr inbounds %1, ptr %block, i64 0, i32 461 store ptr @__block_descriptor_tmp, ptr %block.descriptor, align 862 %block.captured = getelementptr inbounds %1, ptr %block, i64 0, i32 563 %2 = call ptr @llvm.objc.loadWeak(ptr %w) nounwind64 %3 = call ptr @llvm.objc.initWeak(ptr %block.captured, ptr %2) nounwind65 call void @use_block(ptr %block) nounwind66 call void @llvm.objc.destroyWeak(ptr %block.captured) nounwind67 call void @llvm.objc.destroyWeak(ptr %w) nounwind68 call void @llvm.objc.release(ptr %0) nounwind, !clang.imprecise_release !069 ret void70}71 72declare ptr @llvm.objc.retain(ptr)73declare void @use_block(ptr) nounwind74declare void @__qux_block_invoke_0(ptr %.block_descriptor) nounwind75declare void @__copy_helper_block_(ptr, ptr) nounwind76declare void @llvm.objc.copyWeak(ptr, ptr)77declare void @__destroy_helper_block_(ptr) nounwind78declare void @llvm.objc.release(ptr)79declare ptr @bar()80declare ptr @llvm.objc.initWeak(ptr, ptr)81declare ptr @llvm.objc.loadWeak(ptr)82declare void @use(ptr) nounwind83declare void @llvm.objc.destroyWeak(ptr)84 85; CHECK: attributes [[NUW]] = { nounwind }86 87!0 = !{}88