mips-protos.h (mips_split_symbol): Add a mode and an "rtx *" argument.

mips-protos.h (mips_split_symbol): Add a mode and an "rtx *" argument.

gcc/
	* config/mips/mips-protos.h (mips_split_symbol): Add a mode and
	an "rtx *" argument.  Return a bool.
	* config/mips/mips.c (mips_split_symbol): Accept arbitrary source
	values and return true if they can be split.  Take the same kind of
	mode argument as mips_symbol_insns.  Add a "lo_sum_out" parameter
	and store the lo_sum there if nonnull.  Use the symbol type to
	determine whether a $gp or HIGH is needed.
	(mips_legitimize_address): Update call to mips_split_symbol and
	simplify accordingly.
	(mips_legitimize_const_move): Likewise.
	* config/mips/mips.md: In the combine define_split,
	check mips_split_symbol instead of splittable_symbolic_operand.
	Update use of mips_split_symbol in the generator code.
	* config/mips/predicates.md (splittable_symbolic_operand): Delete.

From-SVN: r127298