; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -loop-vectorize -S | FileCheck %s

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"

; Test case based on reproducer for
; http://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6477

define void @test1(i32 %n) #0 {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    br i1 false, label [[DOTLR_PH_PREHEADER:%.*]], label [[DOT_CRIT_EDGE:%.*]]
; CHECK:       .lr.ph.preheader:
; CHECK-NEXT:    br label [[DOTLR_PH:%.*]]
; CHECK:       .lr.ph:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[DOTLR_PH]] ], [ 0, [[DOTLR_PH_PREHEADER]] ]
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    br i1 true, label [[DOT_CRIT_EDGE_LOOPEXIT:%.*]], label [[DOTLR_PH]], !llvm.loop !0
; CHECK:       ._crit_edge.loopexit:
; CHECK-NEXT:    br label [[DOT_CRIT_EDGE]]
; CHECK:       ._crit_edge:
; CHECK-NEXT:    ret void
;
  br i1 false, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph, %0
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %indvars.iv.next = add i64 %indvars.iv, 1
  br i1 true, label %._crit_edge, label %.lr.ph, !llvm.loop !0

._crit_edge:                                      ; preds = %.lr.ph, %0
  ret void
}

!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.interleave.count", i32 2}