* output.h (enum section_category): Export from varasm.c
	(categorize_decl_for_section): Likewise.
	* varasm.c (enum section_category): Kill.
	(categorize_decl_for_section): Make global.
	* i386-protos.h (x86_output_aligned_bss, x86_elf_aligned_common):
	Declare.
	* i386.c (ix86_section_threshold): New static variable.
	(ix86_in_large_data_p, ix86_encode_section_info,
	x86_64_elf_unique_section,
	x86_64_elf_select_section): New functions.
	(TARGET_ENCODE_SECTION_INFO): Define
	(override_options): Enable medium model for PIC.
	(ix86_expand_prologue): Expand gen_set_got_rex64.
	(legitimate_constant_p): Handle new UNSPECs.
	(legitimate_pic_address_disp_p): Likewise.
	(legitimize_pic_address): Lower MEDIUM model addressing.
	* i386.h (PIC_OFFSET_TABLE_REGNUM): Set for medium model PIC.
	(enum cmodel): Add MEDIUM_PIC.
	(SYMBOL_REF_FAR_ADDR_P): New macro.
	(SYMBOL_FLAG_FAR_ADDR): New flag.
	* i386.md (movdi): Support medium model.
	(set_got_rex64): New pattern.
	* i386.opt (mlarge-data-threshold): New flag.
	* predicates.md (zext_operand/sext_operand): Deal with medium model.
	* x86-64.h (ASM_OUTPUT_ALIGNED_BSS): Use x86_output_aligned_bss.
	(ASM_OUTPUT_ALIGNED_COMMON, TARGET_ASM_SELECT_SECTION,
	TARGET_ASM_UNIQUE_SECTION): New.

	* invoke.texi (-mlarge_data_threshold): Document

From-SVN: r102606