* emit-rtl.c (static_regno_reg_rtx): Define.
        (init_emit_once): Initialize static_regno_reg_rtx.
        (init_emit): Copy static_regno_reg_rtx into regno_reg_rtx instead
        of building new hard reg objects once per function.
        (gen_rtx_REG): Try to share hard regs.
	* regclass.c (init_fake_stack_mems): New function broken out from
	init_regs.
	* rtl.h (init_fake_stack_mems): Declare.
	* toplev.c (lang_independent_init): Call init_regs before
	init_emit_once.  Call init_fake_stack_mems after init_emit_once.

From-SVN: r54588