File: epilogue_arc_analysis_bugs.sil

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// RUN: %target-sil-opt -arc-sequence-opts %s

import Builtin
import Swift

class Klass {
}

// Test to make sure there is no crash in EpilogueArcAnalysis, while querying the state of unreachable block bb1
sil @foo : $@convention(thin) (@owned Klass) -> () {
bb0(%arg : $Klass):
  strong_retain %arg : $Klass
  %0 = enum $Optional<Klass>, #Optional.none!enumelt
  br bb2(%0 : $Optional<Klass>)

bb1: // unreachable
  %1 = enum $Optional<Klass>, #Optional.some!enumelt, undef : $Klass
  br bb2(%1 : $Optional<Klass>)

bb2(%2 : $Optional<Klass>):
  switch_enum %2 : $Optional<Klass>, case #Optional.some!enumelt: bb3, case #Optional.none!enumelt: bb4

bb3:
  br bb5

bb4:
  br bb5

bb5:
 release_value %2 : $Optional<Klass>
 strong_release %arg : $Klass
 strong_release %arg : $Klass
 %res = tuple ()
 return %res : $()
}