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Add an optimizer-side test case for ARC bug <rdar://13195034>, fixed
in the frontend with @clang.arc.use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177928 91177308-0d34-0410-b5e6-96231b3b80d8
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; RUN: opt -basicaa -objc-arc -S < %s | FileCheck %s | ||
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target datalayout = "e-p:64:64:64" | ||
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declare i8* @objc_retain(i8*) | ||
declare i8* @objc_retainAutorelease(i8*) | ||
declare void @objc_release(i8*) | ||
declare i8* @objc_autorelease(i8*) | ||
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declare void @clang.arc.use(...) | ||
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declare void @test0_helper(i8*, i8**) | ||
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; Ensure that we honor clang.arc.use as a use and don't miscompile | ||
; the reduced test case from <rdar://13195034>. | ||
; | ||
; FIXME: the fact that we re-order retains w.r.t. @clang.arc.use could | ||
; be problematic if we get run twice, e.g. under LTO. | ||
; | ||
; CHECK: define void @test0( | ||
; CHECK: @objc_retain(i8* %x) | ||
; CHECK-NEXT: store i8* %y, i8** %temp0 | ||
; CHECK-NEXT: @objc_retain(i8* %y) | ||
; CHECK-NEXT: call void @test0_helper | ||
; CHECK-NEXT: [[VAL1:%.*]] = load i8** %temp0 | ||
; CHECK-NEXT: call void (...)* @clang.arc.use(i8* %y) | ||
; CHECK-NEXT: @objc_retain(i8* [[VAL1]]) | ||
; CHECK-NEXT: @objc_release(i8* %y) | ||
; CHECK-NEXT: store i8* [[VAL1]], i8** %temp1 | ||
; CHECK-NEXT: call void @test0_helper | ||
; CHECK-NEXT: [[VAL2:%.*]] = load i8** %temp1 | ||
; CHECK-NEXT: call void (...)* @clang.arc.use(i8* [[VAL1]]) | ||
; CHECK-NEXT: @objc_retain(i8* [[VAL2]]) | ||
; CHECK-NEXT: @objc_release(i8* [[VAL1]]) | ||
; CHECK-NEXT: @objc_autorelease(i8* %x) | ||
; CHECK-NEXT: store i8* %x, i8** %out | ||
; CHECK-NEXT: @objc_release(i8* [[VAL2]]) | ||
; CHECK-NEXT: ret void | ||
define void @test0(i8** %out, i8* %x, i8* %y) { | ||
entry: | ||
%temp0 = alloca i8*, align 8 | ||
%temp1 = alloca i8*, align 8 | ||
%0 = call i8* @objc_retain(i8* %x) nounwind | ||
%1 = call i8* @objc_retain(i8* %y) nounwind | ||
store i8* %y, i8** %temp0 | ||
call void @test0_helper(i8* %x, i8** %temp0) | ||
%val1 = load i8** %temp0 | ||
%2 = call i8* @objc_retain(i8* %val1) nounwind | ||
call void (...)* @clang.arc.use(i8* %y) nounwind | ||
call void @objc_release(i8* %y) nounwind | ||
store i8* %val1, i8** %temp1 | ||
call void @test0_helper(i8* %x, i8** %temp1) | ||
%val2 = load i8** %temp1 | ||
%3 = call i8* @objc_retain(i8* %val2) nounwind | ||
call void (...)* @clang.arc.use(i8* %val1) nounwind | ||
call void @objc_release(i8* %val1) nounwind | ||
%4 = call i8* @objc_retain(i8* %x) nounwind | ||
%5 = call i8* @objc_autorelease(i8* %x) nounwind | ||
store i8* %x, i8** %out | ||
call void @objc_release(i8* %val2) nounwind | ||
call void @objc_release(i8* %x) nounwind | ||
ret void | ||
} |