gimplify.c (gimplify_compound_literal_expr): Take gimple_test_f argument...

	* gimplify.c (gimplify_compound_literal_expr): Take gimple_test_f
	argument, don't emit assign statement if value is directly usable.
	(gimplify_expr): Adjust.

testsuite/
	* gcc.dg/tree-ssa/vector-4.c: New test.

From-SVN: r188665