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gcc/gcc ChangeLog


CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	aldyh@gcc.gnu.org	2002-11-04 08:58:49

Modified files:
	gcc            : ChangeLog 

Log message:
	2002-11-04  Aldy Hernandez  <aldyh@redhat.com>
	
	* hard-reg-set.h (REG_CANNOT_CHANGE_MODE_P): New.
	
	* config/rs6000/rs6000.h (CLASS_CANNOT_CHANGE_MODE_P): Remove.
	(CLASS_CANNOT_CHANGE_MODE): Remove.
	(CANNOT_CHANGE_MODE_CLASS): New.
	
	* config/alpha/alpha.h: Same.
	
	* config/ia64/ia64.h: Same.
	
	* config/mips/mips.h: Same.
	
	* config/s390/s390.h: Same.
	
	* config/sh/sh.h: Same.
	
	* config/pa/pa64-regs.h: Same.
	
	* config/sh/sh-protos.h (sh_cannot_change_mode_class): Add prototype.
	
	* config/sh/sh.c (sh_cannot_change_mode_class): New.
	
	* config/mips/mips-protos.h (mips_cannot_change_mode_class): Add
	prototype.
	
	* config/mips/mips.c (mips_cannot_change_mode_class): New.
	
	* doc/tm.texi (Register Classes): Remove
	CLASS_CANNOT_CHANGE_MODE and CLASS_CANNOT_CHANGE_MODE_P.
	Document CANNOT_CHANGE_MODE_CLASS.
	
	* reload.c (push_reload): Use CANNOT_CHANGE_MODE_CLASS.
	(push_reload): Same.
	
	* simplify-rtx.c (simplify_subreg): Same.
	
	* reload1.c (choose_reload_regs): Same.
	
	* recog.c (register_operand): Same.
	
	* regrename.c (mode_change_ok): Change to use new
	CANNOT_CHANGE_MODE_CLASS infrastructure.
	
	* regclass.c (cannot_change_mode_set_regs): New.
	Declare subregs_of_mode.
	(regclass): Use subregs_of_mode.
	Remove references to reg_changes_mode.
	(init_reg_sets_1): Remove class_can_change_mode and
	reg_changes_mode code.
	(invalid_mode_change_p): New.
	(dump_regclass): Use invalid_mode_change_p instead of
	class_can_change_mode.
	(regclass): Same.
	(record_operand_costs): Do not set reg_changes_mode.
	
	* local-alloc.c (struct qty): Remove changes_mode field.
	(alloc_qty): Remove changes_mode initialization.
	(update_qty_class): Remove set of changes_mode.
	(find_free_reg): Use subregs_of_mode.
	
	* global.c (find_reg): Use subregs_of_mode info.
	
	* rtl.h (cannot_change_mode_set_regs): New prototype.
	(invalid_mode_change_p): Same.
	(REG_CANNOT_CHANGE_MODE_P): New macro.
	
	* flow.c (mark_used_regs): Calculate subregs_of_mode.  Remove
	REG_CHANGES_MODE.
	(life_analysis): Clear subregs_of_mode.
	
	* combine.c (subst): Pass class to CLASS_CANNOT_CHANGE_MODE_P.
	Remove use of CLASS_CANNOT_CHANGE_MODE.
	(simplify_set): Same.
	(gen_lowpart_for_combine): Calculate subregs_of_mode.  Remove
	REG_CHANGES_MODE.
	
	* regs.h: Add extern for subregs_of_mode;
	Include hard-reg-set and basic-block.
	(REG_CHANGES_MODE): Delete.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.15848&r2=1.15849


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