re PR target/92095 (internal error with -O1 -mcpu=niagara2 -fPIE)

re PR target/92095 (internal error with -O1 -mcpu=niagara2 -fPIE)

	PR target/92095
	* config/sparc/sparc-protos.h (output_load_pcrel_sym): Declare.
	* config/sparc/sparc.c (sparc_cannot_force_const_mem): Revert latest
 	change.
	(got_helper_needed): New static variable.
	(output_load_pcrel_sym): New function.
	(get_pc_thunk_name): Remove after inlining...
	(load_got_register): ...here.  Rework the initialization of the GOT
	register and of the GOT helper.
	(save_local_or_in_reg_p): Test the REGNO of the GOT register.
	(sparc_file_end): Test got_helper_needed to decide whether the GOT
	helper must be emitted.  Use output_asm_insn instead of fprintf.
	(sparc_init_pic_reg): In PIC mode, always initialize the PIC register
	if optimization is enabled.
	* config/sparc/sparc.md (load_pcrel_sym<P:mode>): Emit the assembly
	by calling output_load_pcrel_sym.

From-SVN: r277966