gcc/

gcc/
	* config/mips/mips.h (reg_class): Remove HI_AND_GR_REGS,
	LO_AND_GR_REGS, HI_AND_FP_REGS, COP0_AND_GR_REGS, COP2_AND_GR_REGS,
	COP3_AND_GR_REGS, ALL_COP_REGS and ALL_COP_AND_GR_REGS.
	Add GR_AND_MD0_REGS, GR_AND_MD1_REGS, GR_AND_MD_REGS and
	GR_AND_ACC_REGS.
	(REG_CLASS_NAMES): Update accordingly.
	(REG_CLASS_CONTENTS): Likewise.  Use the class name in the comments,
	rather than an unpredictable descriptive string.
	* config/mips/mips.c (mips_register_move_cost): Remove comment.
	(mips_register_move_cost): Check for specific COP*_REGS classes,
	instead of ALL_COP_AND_GR_REGS.
	(mips_ira_cover_classes): New function.
	(mips_secondary_reload_class): Remove MTLO and MTHI workarounds.
	(TARGET_IRA_COVER_CLASSES): Define.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@141117 138bc75d-0d04-0410-961f-82ee72b054a4