H8 cc0 conversion

gcc/
	* config/h8300/addsub.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	(add<mod>3_incdec): Remove pattern
	(adds/subs splitter): Only run before reload.
	* config/h8300/bitfield.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output
	of the splitters.
	(cstoreqi4, cstorehi4, cstoresi4): Comment out
	(*bstzhireg, *cmpstz, *bstz, *bistz, *cmpcondset): Likewise
	(*condbset, *cmpcondbclr, *condbclr): Likewise.
	(*cmpcondbsetreg, *condbsetreg, *cmpcondbclrreg): Likewise.
	(*condbclrreg): Likewise.
	* config/h8300/combiner.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.  Add appropriate CC register clobbers to
	existing splitters.
	(*addsi3_and_r_1): Disable for now.
	(*addsi3_and_not_r_1, bit-test branches): Likewise.
	* config/h8300/divmod.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/extensions.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/genmova.sh: Drop "cc" attribute from patterns.
	* config/h8300/mova.md: Drop "cc" attribute from patterns.
	* config/h8300/h8300-modes.def: Add CCZN and CCZNV modes.
	* config/h8300/h8300-protos.h (output_plussi): Update prototype.
	(compute_plussi_length): Likewise.
	(h8300_select_cc_mode): Add prototype.
	(compute_a_shift_cc): Remove prototype
	(cmpute_logical_op_cc): Likewise.
	* config/h8300/h8300.c (names_big): Add "cc" register.
	(names_extended, names_upper_extended): Likewise.
	(h8300_emit_stack_adjustment): Be more selective about setting
	RTX_FRAME_RELATED_P.
	(h8300_print_operand): Handle CCZN mode
	(h8300_select_cc_mode): New function.
	(notice_update_cc): if-0 out.  Only kept for reference purposes.
	(h8300_expand_store): Likewise.
	(h8300_binary_length): Handle new insn forms.
	(output_plussi): Add argument for NEED_FLAGS and handle that case.
	(compute_plussi_length): Likewise.
	(compute_logical_op_cc): Return integer.
	(TARGET_FLAGS_REGNUM): Define.
	* config/h8300/h8300.h (FIRST_PSEUDO_REGISTER): Bump for cc register.
	(FIXED_REGISTERS, CALL_USED_REGISTERS): Handle cc register.
	(REG_ALLOC_ORDER, REGISTER_NAMES): Likewise.
	(SELECT_CC_MODE): Define.
	* config/h8300/h8300.md: Add CC_REG.
	Do not include peepholes.md for now.
	* config/h8300/jumpcall.md (cbranchqi4): Consolidate into
	cbranch<mode>4.
	(cbranchhi4, cbranchsi4): Likewise.
	(cbranch<mode>4): New expander.
	(branch): New define_insn_and_split for use before reload.
	(branch_1, branch_1_false): New patterns to match splitter output.
	Remove code to manage cc_status.flags.
	* config/h8300/logical.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.  Move various peepholes into this file.
	* config/h8300/movepush.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/multiply.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/other.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/peepholes.md: Remove peepholes that were moved
	elsewhere.
	* config/h8300/predicates.md (simple_memory_operand): New.
	* config/h8300/proepi.md: Drop "cc" attribute setting.
	* config/h8300/shiftrotate.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.
	* config/h8300/testcompare.md: Turn existing patterns into
	define_insn_and_split style patterns where the splitter
	adds a clobber of the condition code register.  Drop "cc"
	attribute.  Add _clobber_flags patterns to match output of
	the splitters.  Disable various patterns for now.
	Move some peepholes that were previously in peepholes.md here.