fold-const.c (fold_range_test): Use RANGE_TEST_NON_SHORT_CIRCUIT macro defaulting to original BRANCH_COST heuristic.

        * fold-const.c (fold_range_test): Use RANGE_TEST_NON_SHORT_CIRCUIT
        macro defaulting to original BRANCH_COST heuristic.
        * doc/tm.texi (RANGE_TEST_NON_SHORT_CIRCUIT): Document.

        * config/rs6000/rs6000.h (RANGE_TEST_NON_SHORT_CIRCUIT): Define.

From-SVN: r65942