1 ; RUN: opt -S -basicaa -objc-arc < %s | FileCheck %s
3 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"
4 target triple = "x86_64-apple-darwin11.0.0"
6 %0 = type { i64, i64, i8*, i8*, i8*, i8* }
7 %1 = type <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>
8 %struct.__block_descriptor = type { i64, i64 }
10 @_NSConcreteStackBlock = external global i8*
11 @.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 1
13 @__block_descriptor_tmp = internal constant %0 { i64 0, i64 40, i8* bitcast (void (i8*, i8*)* @__copy_helper_block_ to i8*), i8* bitcast (void (i8*)* @__destroy_helper_block_ to i8*), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @"\01L_OBJC_CLASS_NAME_", i32 0, i32 0) }
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 i8*] [i8* getelementptr inbounds ([3 x i8], [3 x i8]* @"\01L_OBJC_CLASS_NAME_", i32 0, i32 0), i8* bitcast ([2 x i32]* @"\01L_OBJC_IMAGE_INFO" to i8*)], section "llvm.metadata"
17 ; Eliminate unnecessary weak pointer copies.
19 ; CHECK: define void @foo() {
21 ; CHECK-NEXT: %call = call i8* @bar()
22 ; CHECK-NEXT: call void @use(i8* %call) [[NUW:#[0-9]+]]
23 ; CHECK-NEXT: ret void
27 %w = alloca i8*, align 8
28 %x = alloca i8*, align 8
29 %call = call i8* @bar()
30 %0 = call i8* @llvm.objc.initWeak(i8** %w, i8* %call) nounwind
31 %1 = call i8* @llvm.objc.loadWeak(i8** %w) nounwind
32 %2 = call i8* @llvm.objc.initWeak(i8** %x, i8* %1) nounwind
33 %3 = call i8* @llvm.objc.loadWeak(i8** %x) nounwind
34 call void @use(i8* %3) nounwind
35 call void @llvm.objc.destroyWeak(i8** %x) nounwind
36 call void @llvm.objc.destroyWeak(i8** %w) nounwind
40 ; Eliminate unnecessary weak pointer copies in a block initialization.
42 ; CHECK: define void @qux(i8* %me) #0 {
44 ; CHECK-NEXT: %block = alloca %1, align 8
47 define void @qux(i8* %me) nounwind {
49 %w = alloca i8*, align 8
50 %block = alloca %1, align 8
51 %0 = call i8* @llvm.objc.retain(i8* %me) nounwind
52 %1 = call i8* @llvm.objc.initWeak(i8** %w, i8* %0) nounwind
53 %block.isa = getelementptr inbounds %1, %1* %block, i64 0, i32 0
54 store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8
55 %block.flags = getelementptr inbounds %1, %1* %block, i64 0, i32 1
56 store i32 1107296256, i32* %block.flags, align 8
57 %block.reserved = getelementptr inbounds %1, %1* %block, i64 0, i32 2
58 store i32 0, i32* %block.reserved, align 4
59 %block.invoke = getelementptr inbounds %1, %1* %block, i64 0, i32 3
60 store i8* bitcast (void (i8*)* @__qux_block_invoke_0 to i8*), i8** %block.invoke, align 8
61 %block.descriptor = getelementptr inbounds %1, %1* %block, i64 0, i32 4
62 store %struct.__block_descriptor* bitcast (%0* @__block_descriptor_tmp to %struct.__block_descriptor*), %struct.__block_descriptor** %block.descriptor, align 8
63 %block.captured = getelementptr inbounds %1, %1* %block, i64 0, i32 5
64 %2 = call i8* @llvm.objc.loadWeak(i8** %w) nounwind
65 %3 = call i8* @llvm.objc.initWeak(i8** %block.captured, i8* %2) nounwind
66 %4 = bitcast %1* %block to void ()*
67 call void @use_block(void ()* %4) nounwind
68 call void @llvm.objc.destroyWeak(i8** %block.captured) nounwind
69 call void @llvm.objc.destroyWeak(i8** %w) nounwind
70 call void @llvm.objc.release(i8* %0) nounwind, !clang.imprecise_release !0
74 declare i8* @llvm.objc.retain(i8*)
75 declare void @use_block(void ()*) nounwind
76 declare void @__qux_block_invoke_0(i8* %.block_descriptor) nounwind
77 declare void @__copy_helper_block_(i8*, i8*) nounwind
78 declare void @llvm.objc.copyWeak(i8**, i8**)
79 declare void @__destroy_helper_block_(i8*) nounwind
80 declare void @llvm.objc.release(i8*)
82 declare i8* @llvm.objc.initWeak(i8**, i8*)
83 declare i8* @llvm.objc.loadWeak(i8**)
84 declare void @use(i8*) nounwind
85 declare void @llvm.objc.destroyWeak(i8**)
87 ; CHECK: attributes [[NUW]] = { nounwind }