Backport from mainline

	Backport from mainline
	2012-07-24  Uros Bizjak  <ubizjak@gmail.com>

	PR target/53961
	* config/i386/i386.c (ix86_legitimate_address_p): Move check for
	negative constant address for TARGET_X32 ...
	(ix86_decompose_address): ... here.  Reject constant addresses
	that don't satisfy x86_64_immediate_operand predicate.

	2012-07-23  Uros Bizjak  <ubizjak@gmail.com>

	PR target/53961
	* config/i386/i386.md (*lea): Add asserts to detect invalid addresses.
	* config/i386/i386.c (ix86_print_operand_address): Ditto.
	(ix86_decompose_address): Allow (zero_extend:DI (subreg:SI (...)))
	addresses.  Prevent zero extensions of CONST_INT operands.

	2012-07-22  Uros Bizjak  <ubizjak@gmail.com>

	PR target/53961
	* config/i386/i386.md (*lea): New insn pattern.
	(*lea_1): Remove.
	(*lea<mode>_2): Ditto.
	(*lea_{3,4,5,6}_zext): Ditto.
	* config/i386/predicates.md (lea_address_operand): Do not reject
	zero-extended address operands.
	* config/i386/constraints.md (j): Remove address constraint.
	* config/i386/i386.c (ix86_decompose_address): Allow SImode subreg
	of an address.
	(ix86_print_operand_address): Handle SImode subreg of an address.
	(ix86_avoid_lea_for_addr): Reject zero-extended addresses for now.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@190089 138bc75d-0d04-0410-961f-82ee72b054a4