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; RUN: opt < %s -extract-blocks -disable-output

define void @test1() {
no_exit.0.i:
        br i1 false, label %yylex.entry, label %yylex.entry

yylex.entry:            ; preds = %no_exit.0.i, %no_exit.0.i
        %tmp.1027 = phi i32 [ 0, %no_exit.0.i ], [ 0, %no_exit.0.i ]            ; <i32> [#uses=0]
        ret void
}

define void @test2() {
no_exit.0.i:
        switch i32 0, label %yylex.entry [
                 i32 0, label %yylex.entry
                 i32 1, label %foo
        ]

yylex.entry:            ; preds = %no_exit.0.i, %no_exit.0.i
        %tmp.1027 = phi i32 [ 0, %no_exit.0.i ], [ 0, %no_exit.0.i ]            ; <i32> [#uses=0]
        ret void

foo:            ; preds = %no_exit.0.i
        ret void
}