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; RUN: llvm-upgrade < %s | llvm-as | opt -mem2reg -disable-output
; PR670

void %printk(int, ...) {
entry:
	%flags = alloca uint		; <uint*> [#uses=2]
	br bool false, label %then.0, label %endif.0

then.0:		; preds = %entry
	br label %endif.0

endif.0:		; preds = %then.0, %entry
	store uint 0, uint* %flags
	br label %loopentry

loopentry:		; preds = %endif.3, %endif.0
	br bool false, label %no_exit, label %loopexit

no_exit:		; preds = %loopentry
	br bool false, label %then.1, label %endif.1

then.1:		; preds = %no_exit
	br bool false, label %shortcirc_done.0, label %shortcirc_next.0

shortcirc_next.0:		; preds = %then.1
	br label %shortcirc_done.0

shortcirc_done.0:		; preds = %shortcirc_next.0, %then.1
	br bool false, label %shortcirc_done.1, label %shortcirc_next.1

shortcirc_next.1:		; preds = %shortcirc_done.0
	br label %shortcirc_done.1

shortcirc_done.1:		; preds = %shortcirc_next.1, %shortcirc_done.0
	br bool false, label %shortcirc_done.2, label %shortcirc_next.2

shortcirc_next.2:		; preds = %shortcirc_done.1
	br label %shortcirc_done.2

shortcirc_done.2:		; preds = %shortcirc_next.2, %shortcirc_done.1
	br bool false, label %then.2, label %endif.2

then.2:		; preds = %shortcirc_done.2
	br label %endif.2

endif.2:		; preds = %then.2, %shortcirc_done.2
	br label %endif.1

endif.1:		; preds = %endif.2, %no_exit
	br bool false, label %then.3, label %endif.3

then.3:		; preds = %endif.1
	br label %endif.3

endif.3:		; preds = %then.3, %endif.1
	br label %loopentry

loopexit:		; preds = %loopentry
	br label %endif.4

then.4:		; No predecessors!
	%tmp.61 = load uint* %flags		; <uint> [#uses=0]
	br label %out

dead_block_after_goto:		; No predecessors!
	br label %endif.4

endif.4:		; preds = %dead_block_after_goto, %loopexit
	br bool false, label %then.5, label %else

then.5:		; preds = %endif.4
	br label %endif.5

else:		; preds = %endif.4
	br label %endif.5

endif.5:		; preds = %else, %then.5
	br label %out

out:		; preds = %endif.5, %then.4
	br label %return

after_ret:		; No predecessors!
	br label %return

return:		; preds = %after_ret, %out
	ret void
}