hard-reg-set.h (REG_CANNOT_CHANGE_MODE_P): New.

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.

From-SVN: r58794

1 files changed, 6 insertions, 13 deletions

diff --git a/gcc/global.c b/gcc/global.c
index a100096..dfbe038 100644
--- a/gcc/global.c
+++ b/gcc/global.c
@@ -974,10 +974,7 @@ find_reg (num, losers, alt_regs_p, accept_call_clobbered, retrying)
      int retrying;
 {
   int i, best_reg, pass;
-#ifdef HARD_REG_SET
-  register		/* Declare it register if it's a scalar.  */
-#endif
-    HARD_REG_SET used, used1, used2;
+  HARD_REG_SET used, used1, used2;
 
   enum reg_class class = (alt_regs_p
 			  ? reg_alternate_class (allocno[num].reg)
@@ -1001,10 +998,8 @@ find_reg (num, losers, alt_regs_p, accept_call_clobbered, retrying)
 
   IOR_HARD_REG_SET (used1, allocno[num].hard_reg_conflicts);
 
-#ifdef CLASS_CANNOT_CHANGE_MODE
-  if (REG_CHANGES_MODE (allocno[num].reg))
-    IOR_HARD_REG_SET (used1,
-		      reg_class_contents[(int) CLASS_CANNOT_CHANGE_MODE]);
+#ifdef CANNOT_CHANGE_MODE_CLASS
+  cannot_change_mode_set_regs (&used1, mode, allocno[num].reg);
 #endif
 
   /* Try each hard reg to see if it fits.  Do this in two passes.
@@ -1200,11 +1195,9 @@ find_reg (num, losers, alt_regs_p, accept_call_clobbered, retrying)
 	      && (allocno[num].calls_crossed == 0
 		  || accept_call_clobbered
 		  || ! HARD_REGNO_CALL_PART_CLOBBERED (regno, mode))
-#ifdef CLASS_CANNOT_CHANGE_MODE
-	      && ! (REG_CHANGES_MODE (allocno[num].reg)
-		    && (TEST_HARD_REG_BIT
-			(reg_class_contents[(int) CLASS_CANNOT_CHANGE_MODE],
-			 regno)))
+#ifdef CANNOT_CHANGE_MODE_CLASS
+	      && ! invalid_mode_change_p (regno, REGNO_REG_CLASS (regno),
+					  mode)
 #endif
 	      )
 	    {