2012-12-10  Steve Ellcey  <sellcey@mips.com>

	PR target/54061
	rtl.h (IGNORED_DWARF_REGNUM): New.
	* dwarf2out.c (reg_loc_descriptor): Check for IGNORED_DWARF_REGNUM.
	(mem_loc_descriptor): Ditto.
	* config/mips/mips.h (ALL_COP_REG_FIRST): New.
	(ALL_COP_REG_LAST): New.
	(ALL_COP_REG_NUM): Redefine using above macros.
	* config/mips/mips.c (mips_option_override): Set mips_dbx_regno
	coprocessor entries to IGNORED_DWARF_REGNUM.

From-SVN: r194372