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; RUN: opt -regions -analyze < %s | FileCheck %s
; RUN: opt < %s -passes='print<regions>' 2>&1 | FileCheck %s
; We should not crash if there are some bbs that are not reachable.
define void @f() {
entry:
br label %for.pre
notintree: ; No predecessors!
br label %ret
for.pre: ; preds = %entry
br label %for
for: ; preds = %for.inc, %for.pre
%indvar = phi i64 [ 0, %for.pre ], [ %indvar.next, %for.inc ]
%exitcond = icmp ne i64 %indvar, 200
br i1 %exitcond, label %for.inc, label %ret
for.inc: ; preds = %for
%indvar.next = add i64 %indvar, 1
br label %for
ret: ; preds = %for, %notintree
ret void
}
; CHECK: [0] entry => <Function Return>
; CHECK: [1] for => ret
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