2013-04-03  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* simplify-rtx.c (simplify_binary_operation_1) <VEC_SELECT>:
	Handle VEC_MERGE.
	(simplify_ternary_operation) <VEC_MERGE>: Use unsigned HOST_WIDE_INT
	for masks. Test for side effects. Handle nested VEC_MERGE. Handle
	equal arguments.

gcc/testsuite/
	* gcc.target/i386/merge-1.c: New testcase.
	* gcc.target/i386/avx2-vpblendd128-1.c: Make it non-trivial.

From-SVN: r197394