2016-04-26  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* genmatch.c (write_predicate): Add ATTRIBUTE_UNUSED.
	* fold-const.c (fold_binary_loc): Remove 2 transformations
	superseded by match.pd.
	* match.pd (x+x -> x*2): Generalize to integers.

gcc/testsuite/
	* gcc.dg/fold-plusmult.c: Adjust.
	* gcc.dg/no-strict-overflow-6.c: Adjust.
	* gcc.dg/gomp/loop-1.c: Xfail some tests.

From-SVN: r235444