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51 lines
1.8 KiB
51 lines
1.8 KiB
4 months ago
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; 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* @objc_retain(i8* %call) [[NUW:#[0-9]+]]
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; CHECK: call i8* @objc_retain(i8* %call) [[NUW]]
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; CHECK: call i8* @objc_retain(i8* %cond) [[NUW]]
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; CHECK: call void @objc_release(i8* %call) [[NUW]]
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; CHECK: call void @objc_release(i8* %call) [[NUW]]
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; CHECK: call void @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* @objc_retain(i8* %call) nounwind
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%t1 = call i8* @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* @objc_retain(i8* %cond) nounwind
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call void @objc_release(i8* %call) nounwind
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call void @objc_release(i8* %call) nounwind
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call void @use_pointer(i8* %cond)
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call void @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 @objc_release(i8*)
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declare i8* @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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