1 ; RUN: opt -objc-arc -S < %s | FileCheck %s 2 ; rdar://11229925 3 4 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-S128" 5 6 %struct.__block_byref_weakLogNTimes = type { i8*, %struct.__block_byref_weakLogNTimes*, i32, i32, i8*, i8*, void (...)* } 7 %struct.__block_descriptor = type { i64, i64 } 8 9 ; Don't optimize away the retainBlock, because the object's address "escapes" 10 ; with the objc_storeWeak call. 11 12 ; CHECK-LABEL: define void @test0( 13 ; CHECK: %tmp7 = call i8* @objc_retainBlock(i8* %tmp6) [[NUW:#[0-9]+]], !clang.arc.copy_on_escape !0 14 ; CHECK: call void @objc_release(i8* %tmp7) [[NUW]], !clang.imprecise_release !0 15 ; CHECK: } 16 define void @test0() nounwind { 17 entry: 18 %weakLogNTimes = alloca %struct.__block_byref_weakLogNTimes, align 8 19 %block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, align 8 20 %byref.isa = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 0 21 store i8* null, i8** %byref.isa, align 8 22 %byref.forwarding = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 1 23 store %struct.__block_byref_weakLogNTimes* %weakLogNTimes, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8 24 %byref.flags = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 2 25 store i32 33554432, i32* %byref.flags, align 8 26 %byref.size = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 3 27 store i32 48, i32* %byref.size, align 4 28 %tmp1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 4 29 store i8* bitcast (void (i8*, i8*)* @__Block_byref_object_copy_ to i8*), i8** %tmp1, align 8 30 %tmp2 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 5 31 store i8* bitcast (void (i8*)* @__Block_byref_object_dispose_ to i8*), i8** %tmp2, align 8 32 %weakLogNTimes1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 6 33 %tmp3 = bitcast void (...)** %weakLogNTimes1 to i8** 34 %tmp4 = call i8* @objc_initWeak(i8** %tmp3, i8* null) nounwind 35 %block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 0 36 store i8* null, i8** %block.isa, align 8 37 %block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 1 38 store i32 1107296256, i32* %block.flags, align 8 39 %block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 2 40 store i32 0, i32* %block.reserved, align 4 41 %block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 3 42 store i8* bitcast (void (i8*, i32)* @__main_block_invoke_0 to i8*), i8** %block.invoke, align 8 43 %block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 4 44 store %struct.__block_descriptor* null, %struct.__block_descriptor** %block.descriptor, align 8 45 %block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 5 46 %tmp5 = bitcast %struct.__block_byref_weakLogNTimes* %weakLogNTimes to i8* 47 store i8* %tmp5, i8** %block.captured, align 8 48 %tmp6 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block to i8* 49 %tmp7 = call i8* @objc_retainBlock(i8* %tmp6) nounwind, !clang.arc.copy_on_escape !0 50 %tmp8 = load %struct.__block_byref_weakLogNTimes*, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8 51 %weakLogNTimes3 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %tmp8, i64 0, i32 6 52 %tmp9 = bitcast void (...)** %weakLogNTimes3 to i8** 53 %tmp10 = call i8* @objc_storeWeak(i8** %tmp9, i8* %tmp7) nounwind 54 %tmp11 = getelementptr inbounds i8, i8* %tmp7, i64 16 55 %tmp12 = bitcast i8* %tmp11 to i8** 56 %tmp13 = load i8*, i8** %tmp12, align 8 57 %tmp14 = bitcast i8* %tmp13 to void (i8*, i32)* 58 call void %tmp14(i8* %tmp7, i32 10) nounwind, !clang.arc.no_objc_arc_exceptions !0 59 call void @objc_release(i8* %tmp7) nounwind, !clang.imprecise_release !0 60 call void @_Block_object_dispose(i8* %tmp5, i32 8) nounwind 61 call void @objc_destroyWeak(i8** %tmp3) nounwind 62 ret void 63 } 64 65 ; Like test0, but it makes a regular call instead of a storeWeak call, 66 ; so the optimization is valid. 67 68 ; CHECK-LABEL: define void @test1( 69 ; CHECK-NOT: @objc_retainBlock 70 ; CHECK: } 71 define void @test1() nounwind { 72 entry: 73 %weakLogNTimes = alloca %struct.__block_byref_weakLogNTimes, align 8 74 %block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, align 8 75 %byref.isa = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 0 76 store i8* null, i8** %byref.isa, align 8 77 %byref.forwarding = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 1 78 store %struct.__block_byref_weakLogNTimes* %weakLogNTimes, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8 79 %byref.flags = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 2 80 store i32 33554432, i32* %byref.flags, align 8 81 %byref.size = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 3 82 store i32 48, i32* %byref.size, align 4 83 %tmp1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 4 84 store i8* bitcast (void (i8*, i8*)* @__Block_byref_object_copy_ to i8*), i8** %tmp1, align 8 85 %tmp2 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 5 86 store i8* bitcast (void (i8*)* @__Block_byref_object_dispose_ to i8*), i8** %tmp2, align 8 87 %weakLogNTimes1 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %weakLogNTimes, i64 0, i32 6 88 %tmp3 = bitcast void (...)** %weakLogNTimes1 to i8** 89 %tmp4 = call i8* @objc_initWeak(i8** %tmp3, i8* null) nounwind 90 %block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 0 91 store i8* null, i8** %block.isa, align 8 92 %block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 1 93 store i32 1107296256, i32* %block.flags, align 8 94 %block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 2 95 store i32 0, i32* %block.reserved, align 4 96 %block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 3 97 store i8* bitcast (void (i8*, i32)* @__main_block_invoke_0 to i8*), i8** %block.invoke, align 8 98 %block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 4 99 store %struct.__block_descriptor* null, %struct.__block_descriptor** %block.descriptor, align 8 100 %block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block, i64 0, i32 5 101 %tmp5 = bitcast %struct.__block_byref_weakLogNTimes* %weakLogNTimes to i8* 102 store i8* %tmp5, i8** %block.captured, align 8 103 %tmp6 = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i8* }>* %block to i8* 104 %tmp7 = call i8* @objc_retainBlock(i8* %tmp6) nounwind, !clang.arc.copy_on_escape !0 105 %tmp8 = load %struct.__block_byref_weakLogNTimes*, %struct.__block_byref_weakLogNTimes** %byref.forwarding, align 8 106 %weakLogNTimes3 = getelementptr inbounds %struct.__block_byref_weakLogNTimes, %struct.__block_byref_weakLogNTimes* %tmp8, i64 0, i32 6 107 %tmp9 = bitcast void (...)** %weakLogNTimes3 to i8** 108 %tmp10 = call i8* @not_really_objc_storeWeak(i8** %tmp9, i8* %tmp7) nounwind 109 %tmp11 = getelementptr inbounds i8, i8* %tmp7, i64 16 110 %tmp12 = bitcast i8* %tmp11 to i8** 111 %tmp13 = load i8*, i8** %tmp12, align 8 112 %tmp14 = bitcast i8* %tmp13 to void (i8*, i32)* 113 call void %tmp14(i8* %tmp7, i32 10) nounwind, !clang.arc.no_objc_arc_exceptions !0 114 call void @objc_release(i8* %tmp7) nounwind, !clang.imprecise_release !0 115 call void @_Block_object_dispose(i8* %tmp5, i32 8) nounwind 116 call void @objc_destroyWeak(i8** %tmp3) nounwind 117 ret void 118 } 119 120 declare void @__Block_byref_object_copy_(i8*, i8*) nounwind 121 declare void @__Block_byref_object_dispose_(i8*) nounwind 122 declare void @objc_destroyWeak(i8**) 123 declare i8* @objc_initWeak(i8**, i8*) 124 declare void @__main_block_invoke_0(i8* nocapture, i32) nounwind ssp 125 declare void @_Block_object_dispose(i8*, i32) 126 declare i8* @objc_retainBlock(i8*) 127 declare i8* @objc_storeWeak(i8**, i8*) 128 declare i8* @not_really_objc_storeWeak(i8**, i8*) 129 declare void @objc_release(i8*) 130 131 !0 = !{} 132 133 ; CHECK: attributes [[NUW]] = { nounwind } 134 ; CHECK: attributes #1 = { nounwind ssp } 135
