be4f571107
We're moving ARC optimisation and ARC emission in clang away from runtime methods and towards intrinsics. This is the part which actually uses the intrinsics in the ARC optimizer when both analyzing the existing calls and emitting new ones. Differential Revision: https://reviews.llvm.org/D55348 Reviewers: ahatanak llvm-svn: 349534
51 lines
1.8 KiB
LLVM
51 lines
1.8 KiB
LLVM
; RUN: opt -S -objc-arc < %s | FileCheck %s
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; Handle a retain+release pair entirely contained within a split loop backedge.
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; rdar://11256239
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; CHECK-LABEL: define void @test0(
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; CHECK: call i8* @llvm.objc.retain(i8* %call) [[NUW:#[0-9]+]]
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; CHECK: call i8* @llvm.objc.retain(i8* %call) [[NUW]]
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; CHECK: call i8* @llvm.objc.retain(i8* %cond) [[NUW]]
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; CHECK: call void @llvm.objc.release(i8* %call) [[NUW]]
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; CHECK: call void @llvm.objc.release(i8* %call) [[NUW]]
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; CHECK: call void @llvm.objc.release(i8* %cond) [[NUW]]
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define void @test0() personality i8* bitcast (i32 (...)* @__objc_personality_v0 to i8*) {
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entry:
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br label %while.body
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while.body: ; preds = %while.cond
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%call = invoke i8* @returner()
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to label %invoke.cont unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
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invoke.cont: ; preds = %while.body
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%t0 = call i8* @llvm.objc.retain(i8* %call) nounwind
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%t1 = call i8* @llvm.objc.retain(i8* %call) nounwind
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%call.i1 = invoke i8* @returner()
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to label %invoke.cont1 unwind label %lpad
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invoke.cont1: ; preds = %invoke.cont
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%cond = select i1 undef, i8* null, i8* %call
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%t2 = call i8* @llvm.objc.retain(i8* %cond) nounwind
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call void @llvm.objc.release(i8* %call) nounwind
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call void @llvm.objc.release(i8* %call) nounwind
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call void @use_pointer(i8* %cond)
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call void @llvm.objc.release(i8* %cond) nounwind
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br label %while.body
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lpad: ; preds = %invoke.cont, %while.body
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%t4 = landingpad { i8*, i32 }
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catch i8* null
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ret void
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}
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declare i8* @returner()
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declare i32 @__objc_personality_v0(...)
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declare void @llvm.objc.release(i8*)
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declare i8* @llvm.objc.retain(i8*)
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declare void @use_pointer(i8*)
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!0 = !{}
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; CHECK: attributes [[NUW]] = { nounwind }
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