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

@b = external global i32, align 4
@a = external global i32, align 4
define void @tinkywinky() {
; CHECK-LABEL: @tinkywinky(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[L1:%.*]]
; CHECK:       l1.loopexit:
; CHECK-NEXT:    br label [[L1]]
; CHECK:       l1:
; CHECK-NEXT:    [[F_0:%.*]] = phi i32* [ @b, [[ENTRY:%.*]] ], [ @a, [[L1_LOOPEXIT:%.*]] ]
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond.loopexit:
; CHECK-NEXT:    store i8 undef, i8* null
; CHECK-NEXT:    br label [[FOR_COND]]
; CHECK:       for.cond:
; CHECK-NEXT:    br i1 undef, label [[FOR_END14:%.*]], label [[FOR_COND1_PREHEADER:%.*]]
; CHECK:       for.cond1.preheader:
; CHECK-NEXT:    br label [[FOR_BODY3:%.*]]
; CHECK:       for.cond1:
; CHECK-NEXT:    br label [[L2:%.*]]
; CHECK:       for.body3:
; CHECK-NEXT:    br i1 undef, label [[FOR_COND1:%.*]], label [[L1_LOOPEXIT]]
; CHECK:       l2:
; CHECK-NEXT:    [[G_4:%.*]] = phi i32* [ @b, [[FOR_END14]] ], [ @a, [[FOR_COND1]] ]
; CHECK-NEXT:    [[F_2:%.*]] = phi i32* [ [[F_0]], [[FOR_END14]] ], [ @a, [[FOR_COND1]] ]
; CHECK-NEXT:    br label [[FOR_INC:%.*]]
; CHECK:       for.inc:
; CHECK-NEXT:    br i1 false, label [[FOR_COND_LOOPEXIT:%.*]], label [[FOR_INC]]
; CHECK:       for.end14:
; CHECK-NEXT:    br label [[L2]]
;
entry:
  br label %l1
l1.loopexit:
  %g.223.lcssa = phi i32* [ @b, %for.body3 ]
  br label %l1
l1:
  %g.0 = phi i32* [ undef, %entry ], [ %g.223.lcssa, %l1.loopexit ]
  %f.0 = phi i32* [ @b, %entry ], [ @a, %l1.loopexit ]
  br label %for.cond
for.cond.loopexit:
  br label %for.cond
for.cond:
  %g.1 = phi i32* [ %g.0, %l1 ], [ %g.4, %for.cond.loopexit ]
  %f.1 = phi i32* [ %f.0, %l1 ], [ %f.2, %for.cond.loopexit ]
  br i1 undef, label %for.end14, label %for.cond1.preheader
for.cond1.preheader:
  br label %for.body3
for.cond1:
  br label %l2
for.body3:
  br i1 undef, label %for.cond1, label %l1.loopexit
l2:
  %g.4 = phi i32* [ %g.1, %for.end14 ], [ @a, %for.cond1 ]
  %f.2 = phi i32* [ %f.1, %for.end14 ], [ @a, %for.cond1 ]
  br label %for.inc
for.inc:
  br i1 false, label %for.cond.loopexit, label %for.inc
for.end14:
  br label %l2
}
