re PR rtl-optimization/12345 (internal compiler error: verify_flow_info failed)

re PR rtl-optimization/12345 (internal compiler error: verify_flow_info failed)

	PR optimization/12345
	* config/mips/mips-protos.h (mips_restore_gp): Remove.
	(mips_gp_save_slot): Declare.
	* config/mips/mips.c (mips_restore_gp): Remove in favor of...
	(mips_gp_save_slot): ...this new function.
	* config/mips/mips.md (exception_receiver): Use mips_gp_save_slot
	and mips_output_move to generate the output template.
	(call_internal): Force splitting if TARGET_SPLIT_CALLS.  Don't emit
	a gp load after a noreturn call.  Load the gp using a move rather
	than an exception_receiver pattern.
	(call_value_internal, call_value_multiple_internal): Likewise.
	(call_split, call_value_split, call_value_multiple_split): Clobber $28.

From-SVN: r71935