mips.h (mips_dwarf_regno): Declare.

mips.h (mips_dwarf_regno): Declare.

gcc/
2007-07-20  Nigel Stephens  <nigel@mips.com>
	    Richard Sandiford  <richard@codesourcery.com>

	* config/mips/mips.h (mips_dwarf_regno): Declare.
	(DBX_REGISTER_NUMBER): Remove redundant brackets.
	(HI_REGNUM, LO_REGNUM): Define in an endian-dependent way.
	(AC1HI_REGNUM, AC1LO_REGNUM, AC2HI_REGNUM, AC2LO_REGNUM)
	(AC3HI_REGNUM, AC3LO_REGNUM, ACC_HI_REG_P): Delete.
	(reg_class): Rename HI_REG to MD0_REG and LO_REG to MD1_REG.
	(REG_CLASS_NAMES): Update accordingly.
	* config/mips/mips.c (mips_dwarf_regno): New array.
	(mips_regno_to_class): Rename HI_REG to MD0_REG and LO_REG to MD1_REG.
	(mips_subword): Remove special handling for accumulator registers.
	(override_options): Initiailize mips_dwarf_regno.  Remove use
	of ACC_HI_REG_P.
	(mips_swap_registers): New function.
	(mips_conditional_register_usage): Swap accumulator registers
	around if TARGET_LITTLE_ENDIAN.
	(mips_cannot_change_mode_class): Remove special treatment of ACC_REGS.
	* config/mips/constraints.md (h, l): Use the endianness to choose
	between MD0_REG and MD1_REG.
	* config/mips/mips.md (*mfhilo_<mode>_macc): Use a fixed-string,
	alternative-dependent template.

Co-Authored-By: Richard Sandiford <richard@codesourcery.com>
From-SVN: r126801