xtensa.c (xtensa_copy_incoming_a7): Remove SUBREG on CQImode and CHImode incoming...

xtensa.c (xtensa_copy_incoming_a7): Remove SUBREG on CQImode and CHImode incoming arguments in register a7.

	* config/xtensa/xtensa.c (xtensa_copy_incoming_a7): Remove SUBREG
	on CQImode and CHImode incoming arguments in register a7.
	(function_arg): Wrap BLKmode argument in register a7 in a PARALLEL.
	* config/xtensa/xtensa.h (BLOCK_REG_PADDING): Define.
	* config/xtensa/xtensa.md (movdi, movdf): Only call force_reg or
	xtensa_copy_incoming_a7 before reload.

From-SVN: r76742