[SH, 4.7] Backport Fix sh64-elf build failure [2/3]

[Oleg Endo]

Original patch:
http://gcc.gnu.org/ml/gcc-patches/2012-03/msg00209.html

'Tested' with..

../gcc-4_7-branch/configure --target=sh-elf --prefix=/usr/local
--enable-languages=c,c++ --enable-multilib --disable-libssp
--disable-nls --disable-werror --enable-lto --with-newlib --with-gnu-as
--with-gnu-ld --with-system-zlib

make all

OK for 4.7 branch?

ChangeLog:

        Backport from mainline
        2012-03-03  Kaz Kojima  <kkoj...@gcc.gnu.org>
        * config/sh/sh.c (sh_dwarf_register_span): Don't apply
        DBX_REGISTER_NUMBER.

Index: gcc/config/sh/sh.c
===================================================================
--- gcc/config/sh/sh.c	(revision 188026)
+++ gcc/config/sh/sh.c	(working copy)
@@ -8138,10 +8138,8 @@
   return
     gen_rtx_PARALLEL (VOIDmode,
 		      gen_rtvec (2,
-				 gen_rtx_REG (SFmode,
-					      DBX_REGISTER_NUMBER (regno+1)),
-				 gen_rtx_REG (SFmode,
-					      DBX_REGISTER_NUMBER (regno))));
+				 gen_rtx_REG (SFmode, regno + 1),
+				 gen_rtx_REG (SFmode, regno)));
 }
 
 static enum machine_mode