[PATCH 4.4] fix PR17843 - warn about superfluous default label for switch(boolean_type)

[Bernhard Fischer]

:ADDPATCH middle-end:

(not yet up again, i guess.)

Hi,

The attached patchlet would warn about a superfluous default_label in a
switch_statement that uses a boolean as condition.

Would something like this be appropriate, provided testing passes, or
should it be more generic somehow?

gcc/ChangeLog
2008-01-04  Bernhard Fischer  <>

	* c-common.c (record_surplus_node): New function.
	(c_do_switch_warnings): Warn for surplus default label in switch
	stmt.
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