re PR target/49781 ([x32] Unnecessary lea in x32 mode)

	PR target/49781
	* config/i386/i386.c (ix86_decompose_address): Allow zero-extended
	SImode addresses.
	(ix86_print_operand_address): Handle zero-extended addresses.
	(memory_address_length): Add length of addr32 prefix for
	zero-extended addresses.
	(ix86_secondary_reload): Handle moves to/from double-word general
	registers from/to zero-extended addresses.
	* config/i386/predicates.md (lea_address_operand): Reject
	zero-extended operands.

From-SVN: r177566