rl78.c (rl78_as_legitimate_address): Do not allow reg+addend addresses for the _far namespace.

* config/rl78/rl78.c (rl78_as_legitimate_address): Do not allow
reg+addend addresses for the _far namespace.

From-SVN: r192866

gcc/ChangeLog

+2012-10-26  DJ Delorie  <dj@redhat.com>
+
+	* config/rl78/rl78.c (rl78_as_legitimate_address): Do not allow
+	reg+addend addresses for the _far namespace.
+
 2012-10-26  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* config/rs6000/sync.md (ATOMIC): Correct DI condition.

gcc/config/rl78/rl78.c

@@ -686,6 +686,13 @@ rl78_as_legitimate_address (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x,
   if (! characterize_address (x, &base, &index, &addend))
     return false;
 
+  /* We can't extract the high/low portions of a PLUS address
+     involving a register during devirtualization, so make sure all
+     such __far addresses do not have addends.  This forces GCC to do
+     the sum separately.  */
+  if (addend && base && as == ADDR_SPACE_FAR)
+    return false;
+
   if (base && index)
     {
       int ir = REGNO (index);