[patch] Remove SUBREG_REGNO_OFFSET.

[Kazu Hirata <kazu at hxi dot com>]

Hi,

Attached is a patch to remove SUBREG_REGNO_OFFSET.  Although
documented, it does not appear in any port.  The patch simply removes
it.

Tested on h8300 port.

OK to apply?

Kazu Hirata

2002-01-31  Kazu Hirata  <kazu@hxi.com>

	* rtlanal.c (subreg_regno_offset): Do not use
	SUBREG_REGNO_OFFSET.
	* system.h: Add SUBREG_REGNO_OFFSET to the GCC poison list.
	* doc/tm.texi (SUBREG_REGNO_OFFSET): Remove.

Index: rtlanal.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/rtlanal.c,v
retrieving revision 1.123
diff -u -r1.123 rtlanal.c
--- rtlanal.c	2002/01/18 13:40:33	1.123
+++ rtlanal.c	2002/01/31 19:42:14
@@ -2947,9 +2947,7 @@
    xmode  - The mode of xregno.
    offset - The byte offset.
    ymode  - The mode of a top level SUBREG (or what may become one).
-   RETURN - The regno offset which would be used.  
-   This function can be overridden by defining SUBREG_REGNO_OFFSET,
-   taking the same parameters.  */
+   RETURN - The regno offset which would be used.  */
 unsigned int
 subreg_regno_offset (xregno, xmode, offset, ymode)
      unsigned int xregno;
@@ -2957,15 +2955,10 @@
      unsigned int offset;
      enum machine_mode ymode;
 {
-  unsigned ret;
   int nregs_xmode, nregs_ymode;
   int mode_multiple, nregs_multiple;
   int y_offset;
 
-/* Check for an override, and use it instead.  */
-#ifdef SUBREG_REGNO_OFFSET
-  ret = SUBREG_REGNO_OFFSET (xregno, xmode, offset, ymode);
-#else
   if (xregno >= FIRST_PSEUDO_REGISTER)
     abort ();
 
@@ -2981,10 +2974,7 @@
 
   y_offset = offset / GET_MODE_SIZE (ymode);
   nregs_multiple =  nregs_xmode / nregs_ymode;
-  ret = (y_offset / (mode_multiple / nregs_multiple)) * nregs_ymode;
-#endif
-
-  return ret;
+  return (y_offset / (mode_multiple / nregs_multiple)) * nregs_ymode;
 }
 
 /* Return the final regno that a subreg expression refers to.  */
Index: system.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/system.h,v
retrieving revision 1.116
diff -u -r1.116 system.h
--- system.h	2002/01/22 14:33:35	1.116
+++ system.h	2002/01/31 19:42:14
@@ -605,7 +605,7 @@
 	OMIT_EH_TABLE EASY_DIV_EXPR IMPLICIT_FIX_EXPR			   \
 	LONGJMP_RESTORE_FROM_STACK MAX_INT_TYPE_SIZE ASM_IDENTIFY_GCC	   \
 	STDC_VALUE TRAMPOLINE_ALIGN ASM_IDENTIFY_GCC_AFTER_SOURCE	   \
-	SLOW_ZERO_EXTEND
+	SLOW_ZERO_EXTEND SUBREG_REGNO_OFFSET
 
 #endif /* IN_GCC */
 
Index: doc/tm.texi
===================================================================
RCS file: /cvs/gcc/gcc/gcc/doc/tm.texi,v
retrieving revision 1.95
diff -u -r1.95 tm.texi
--- tm.texi	2002/01/29 23:01:10	1.95
+++ tm.texi	2002/01/31 19:42:23
@@ -1953,25 +1953,6 @@
 Define this macro if the compiler should avoid copies to/from @code{CCmode}
 registers.  You should only define this macro if support for copying to/from
 @code{CCmode} is incomplete.
-
-@findex SUBREG_REGNO_OFFSET
-@item SUBREG_REGNO_OFFSET
-Define this macro if the compiler needs to handle subregs in a non-standard
-way.  The macro returns the correct regno offset for mode @code{YMODE} given
-a subreg of type @code{XMODE}.
-This macro takes 4 parameters:
-@table @code
-@item XREGNO
-A regno of an inner hard subreg_reg (or what will become one).
-@item XMODE
-The mode of xregno.
-@item OFFSET
-The byte offset.
-@item YMODE
-The mode of a top level SUBREG (or what may become one).
-@end table
-The default function can be found in @file{rtlanal.c}, function
-@code{subreg_regno_offset}.  Normally this does not need to be defined.
 @end table
 
 @node Leaf Functions