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; RUN: opt -S -passes=objc-arc < %s | FileCheck %s
; Handle a retain+release pair entirely contained within a split loop backedge.
; rdar://11256239
; CHECK-LABEL: define void @test0(
; CHECK: call ptr @llvm.objc.retain(ptr %call) [[NUW:#[0-9]+]]
; CHECK: call ptr @llvm.objc.retain(ptr %call) [[NUW]]
; CHECK: call ptr @llvm.objc.retain(ptr %cond) [[NUW]]
; CHECK: call void @llvm.objc.release(ptr %call) [[NUW]]
; CHECK: call void @llvm.objc.release(ptr %call) [[NUW]]
; CHECK: call void @llvm.objc.release(ptr %cond) [[NUW]]
define void @test0() personality ptr @__objc_personality_v0 {
entry:
br label %while.body
while.body: ; preds = %while.cond
%call = invoke ptr @returner()
to label %invoke.cont unwind label %lpad, !clang.arc.no_objc_arc_exceptions !0
invoke.cont: ; preds = %while.body
%t0 = call ptr @llvm.objc.retain(ptr %call) nounwind
%t1 = call ptr @llvm.objc.retain(ptr %call) nounwind
%call.i1 = invoke ptr @returner()
to label %invoke.cont1 unwind label %lpad
invoke.cont1: ; preds = %invoke.cont
%cond = select i1 undef, ptr null, ptr %call
%t2 = call ptr @llvm.objc.retain(ptr %cond) nounwind
call void @llvm.objc.release(ptr %call) nounwind
call void @llvm.objc.release(ptr %call) nounwind
call void @use_pointer(ptr %cond)
call void @llvm.objc.release(ptr %cond) nounwind
br label %while.body
lpad: ; preds = %invoke.cont, %while.body
%t4 = landingpad { ptr, i32 }
catch ptr null
ret void
}
declare ptr @returner()
declare i32 @__objc_personality_v0(...)
declare void @llvm.objc.release(ptr)
declare ptr @llvm.objc.retain(ptr)
declare void @use_pointer(ptr)
!0 = !{}
; CHECK: attributes [[NUW]] = { nounwind }
|
