emit-rtl.c (gen_lowpart_common): Use simplify_gen_subreg for constants.

	* emit-rtl.c (gen_lowpart_common): Use simplify_gen_subreg
	for constants.
	(constant_subword): Delete.
	* rtl.h (constant_subword): Delete prototype.
	(immed_double_const): Is not in varasm.c.
	* simplify-rtx.c (simplify_immed_subreg): New.
	(simplify_subreg): Use simplify_immed_subreg.

From-SVN: r75487

gcc/ChangeLog

@@ -5,6 +5,14 @@
 
 2004-01-06  Geoffrey Keating  <geoffk@apple.com>
 
+	* emit-rtl.c (gen_lowpart_common): Use simplify_gen_subreg
+	for constants.
+	(constant_subword): Delete.
+	* rtl.h (constant_subword): Delete prototype.
+	(immed_double_const): Is not in varasm.c.
+	* simplify-rtx.c (simplify_immed_subreg): New.
+	(simplify_subreg): Use simplify_immed_subreg.
+
 	* config/rs6000/rs6000.md (floatsitf2): Use expand_float rather
 	than trying to generate RTL directly.
 	(fix_trunctfsi2): Use expand_fix rather than trying to generate

gcc/rtl.h

@@ -1485,7 +1485,6 @@ extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
 extern rtx gen_realpart (enum machine_mode, rtx);
 extern rtx gen_imagpart (enum machine_mode, rtx);
 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
-extern rtx constant_subword (rtx, int, enum machine_mode);
 
 /* In emit-rtl.c */
 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
@@ -1507,10 +1506,10 @@ extern void push_to_sequence (rtx);
 extern void end_sequence (void);
 extern void push_to_full_sequence (rtx, rtx);
 extern void end_full_sequence (rtx*, rtx*);
-
-/* In varasm.c  */
 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
 			       enum machine_mode);
+
+/* In varasm.c  */
 extern rtx force_const_mem (enum machine_mode, rtx);
 
 /* In varasm.c  */