re PR c/16302 (gcc fails to warn about some common logic errors)

re PR c/16302 (gcc fails to warn about some common logic errors)

2009-05-15  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR 16302
	* fold-const.c (make_range,build_range_check,merge_ranges): Move
	declaration to...
	(merge_ranges): Returns bool.
	* tree.h (make_range): .. to here.
	(build_range_check): Likewise.
	(merge_ranges): Likewise. Renamed from merge_ranges.
	* c-typeck.c (parser_build_binary_op): Update calls to
	warn_logical_operator.
	* c-common.c (warn_logical_operator): Add new warning.
	* c-common.h (warn_logical_operator): Update declaration.
cp/
	* call.c (build_new_op): Update calls to warn_logical_operator.

testsuite/
	* gcc.dg/pr16302.c: New.
	* g++.dg/warn/pr16302.C: New.

From-SVN: r147596