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, 12 insertions, 17 deletions

diff --git a/gcc/combine.c b/gcc/combine.c
index d6dfdf6..8ce9d10 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -3519,15 +3519,13 @@ subst (x, from, to, in_dest, unique_copy)
 		      )
 		    return gen_rtx_CLOBBER (VOIDmode, const0_rtx);
 
-#ifdef CLASS_CANNOT_CHANGE_MODE
+#ifdef CANNOT_CHANGE_MODE_CLASS
 		  if (code == SUBREG
 		      && GET_CODE (to) == REG
 		      && REGNO (to) < FIRST_PSEUDO_REGISTER
-		      && (TEST_HARD_REG_BIT
-			  (reg_class_contents[(int) CLASS_CANNOT_CHANGE_MODE],
-			   REGNO (to)))
-		      && CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (to),
-						     GET_MODE (x)))
+		      && REG_CANNOT_CHANGE_MODE_P (REGNO (to),
+						   GET_MODE (to),
+						   GET_MODE (x)))
 		    return gen_rtx_CLOBBER (VOIDmode, const0_rtx);
 #endif
 
@@ -5198,13 +5196,11 @@ simplify_set (x)
       && (GET_MODE_SIZE (GET_MODE (src))
 	  < GET_MODE_SIZE (GET_MODE (SUBREG_REG (src))))
 #endif
-#ifdef CLASS_CANNOT_CHANGE_MODE
+#ifdef CANNOT_CHANGE_MODE_CLASS
       && ! (GET_CODE (dest) == REG && REGNO (dest) < FIRST_PSEUDO_REGISTER
-	    && (TEST_HARD_REG_BIT
-		(reg_class_contents[(int) CLASS_CANNOT_CHANGE_MODE],
-		 REGNO (dest)))
-	    && CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (src),
-					   GET_MODE (SUBREG_REG (src))))
+	    && REG_CANNOT_CHANGE_MODE_P (REGNO (dest),
+					 GET_MODE (src), 
+					 GET_MODE (SUBREG_REG (src))))
 #endif
       && (GET_CODE (dest) == REG
 	  || (GET_CODE (dest) == SUBREG
@@ -9937,14 +9933,13 @@ gen_lowpart_for_combine (mode, x)
     }
 
   result = gen_lowpart_common (mode, x);
-#ifdef CLASS_CANNOT_CHANGE_MODE
+#ifdef CANNOT_CHANGE_MODE_CLASS
   if (result != 0
       && GET_CODE (result) == SUBREG
       && GET_CODE (SUBREG_REG (result)) == REG
-      && REGNO (SUBREG_REG (result)) >= FIRST_PSEUDO_REGISTER
-      && CLASS_CANNOT_CHANGE_MODE_P (GET_MODE (result),
-				     GET_MODE (SUBREG_REG (result))))
-    REG_CHANGES_MODE (REGNO (SUBREG_REG (result))) = 1;
+      && REGNO (SUBREG_REG (result)) >= FIRST_PSEUDO_REGISTER)
+    SET_REGNO_REG_SET (&subregs_of_mode[GET_MODE (result)],
+		       REGNO (SUBREG_REG (result)));
 #endif
 
   if (result)