Add a test for non most dominating leader.
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
@b = external global i32, align 4
@a = external global i32, align 4
define void @tinkywinky() {
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
}