1 ; RUN: opt -objc-arc -S < %s | FileCheck %s 2 3 ; rdar://10803830 4 ; The optimizer should be able to prove that the block does not 5 ; "escape", so the retainBlock+release pair can be eliminated. 6 7 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" 8 9 %struct.__block_descriptor = type { i64, i64 } 10 11 @_NSConcreteStackBlock = external global i8* 12 @__block_descriptor_tmp = external global { i64, i64, i8*, i8* } 13 14 ; CHECK: define void @test() { 15 ; CHECK-NOT: @objc 16 ; CHECK: declare i8* @objc_retainBlock(i8*) 17 ; CHECK: declare void @objc_release(i8*) 18 19 define void @test() { 20 entry: 21 %block = alloca <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>, align 8 22 %block.isa = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 0 23 store i8* bitcast (i8** @_NSConcreteStackBlock to i8*), i8** %block.isa, align 8 24 %block.flags = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 1 25 store i32 1073741824, i32* %block.flags, align 8 26 %block.reserved = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 2 27 store i32 0, i32* %block.reserved, align 4 28 %block.invoke = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 3 29 store i8* bitcast (i32 (i8*)* @__test_block_invoke_0 to i8*), i8** %block.invoke, align 8 30 %block.descriptor = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 4 31 store %struct.__block_descriptor* bitcast ({ i64, i64, i8*, i8* }* @__block_descriptor_tmp to %struct.__block_descriptor*), %struct.__block_descriptor** %block.descriptor, align 8 32 %block.captured = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block, i64 0, i32 5 33 store i32 4, i32* %block.captured, align 8 34 %tmp = bitcast <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %block to i8* 35 %tmp1 = call i8* @objc_retainBlock(i8* %tmp) nounwind, !clang.arc.copy_on_escape !0 36 %tmp2 = getelementptr inbounds i8* %tmp1, i64 16 37 %tmp3 = bitcast i8* %tmp2 to i8** 38 %tmp4 = load i8** %tmp3, align 8 39 %tmp5 = bitcast i8* %tmp4 to i32 (i8*)* 40 %call = call i32 %tmp5(i8* %tmp1) 41 call void @objc_release(i8* %tmp1) nounwind, !clang.imprecise_release !0 42 ret void 43 } 44 45 declare i32 @__test_block_invoke_0(i8* nocapture %.block_descriptor) nounwind readonly 46 47 declare i8* @objc_retainBlock(i8*) 48 49 declare void @objc_release(i8*) 50 51 !0 = metadata !{} 52
