re PR middle-end/81502 (In some cases the data is moved to memory unnecessarily [partial regression])

2017-07-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/81502
	* match.pd: Add pattern combining BIT_INSERT_EXPR with
	BIT_FIELD_REF.
	* tree-cfg.c (verify_expr): Verify types of BIT_FIELD_REF
	size/pos operands.
	(verify_gimple_assign_ternary): Likewise for BIT_INSERT_EXPR pos.
	* gimple-fold.c (maybe_canonicalize_mem_ref_addr): Use bitsizetype
	for BIT_FIELD_REF args.
	* fold-const.c (make_bit_field_ref): Likewise.
	* tree-vect-stmts.c (vectorizable_simd_clone_call): Likewise.

	* gcc.target/i386/pr81502.c: New testcase.

From-SVN: r250659