t-elf, [...]: New files.

t-elf, [...]: New files.

* config/sh/t-elf, config/sh/crt1.asm, config/sh/crti.asm,
config/sh/crtn.asm: New files.
* config/sh/t-sh (EXTRA_MULTILIB_PARTS): Set.
(crt1.o, crti.o, crtn.o): New targets.
* configure.in [sh-*-elf*, sh-*-rtemself*] (tmake_file): Added
sh/t-elf.
* configure: Rebuilt.
* config/sh/sh.h (INIT_SECTION_ASM_OP, FINI_SECTION_ASM_OP,
STARTFILE_SPEC, ENDFILE_SPEC, CRT_CALL_STATIC_FUNCTION): Define.
* config/sh/elf.h (INIT_SECTION_ASM_OP, FINI_SECTION_ASM_OP):
Undefine for config/elfos.h to redefine.
(STARTFILE_SPEC, ENDFILE_SPEC): Redefine after config/elfos.h.

* config/sh/sh-protos.h (nonpic_symbol_mentioned_p,
legitimize_pic_address, output_pic_addr_const): Declare.
* config/sh/sh.h (CONDITIONAL_REGISTER_USAGE): Fix PIC register.
(PREFERGOT_BIT, TARGET_PREFERGOT): Likewise.
(TARGET_SWITCHES): New switch -mprefergot.
(OVERRIDE_OPTIONS): Set flag_no_function_cse unless -mprefergot.
(PIC_OFFSET_TABLE_REGNUM): Define.
(GOT_SYMBOL_TABLE): Likewise.
(LEGITIMIZE_ADDRESS): Use legitimize_pic_address.
(ENCODE_SECTION_INFO): Define.
(FINALIZE_PIC): New macros.
(LEGITIMATE_PIC_OPERAND_P, SYMBOLIC_CONST_P): New macro.
(ASM_OUTPUT_INT, ASM_OUTPUT_SHORT): Use output_pic_addr_const.
* config/sh/sh.c (print_operand_address): Use output_pic_addr_const.
(prepare_move_operands): Call emit_pic_move or
emit_pic_const_move if appropriate.
(output_far_jump): For PIC, use braf and output long offset.
(machine_dependent_reorg):
(sh_expand_prologue): Save and initialize the PIC register.
(sh_expand_epilogue): Restore it.
(initial_elimination_offset): Account for it.
(nonpic_symbol_mentioned_p): New function.
(legitimize_pic_address): Likewise.
(output_pic_addr_const): Likewise.
* config/sh/sh.md (calli_pcrel, call_valuei_pcrel): New insns.
(call, call_value): Use them.
(GOTaddr2picreg, sym_label2reg, symGOT2reg, symGOTOFF2reg,
symPLT_label2reg): New expands.
* invoke.texi (SH Options): Document -mprefergot.

From-SVN: r36111