re PR target/16480 (using -msdata causes internal compiler error)

	PR target/16480
	* config/rs6000/rs6000.c (rs6000_split_multireg_move): Don't abort
	on "(mem (symbol_ref ..))" rtl.  Look at LO_SUM base regs as well
	as PLUS base regs.

From-SVN: r86598

gcc/ChangeLog

+2004-08-26  Alan Modra  <amodra@bigpond.net.au>
+
+	PR target/16480
+	* config/rs6000/rs6000.c (rs6000_split_multireg_move): Don't abort
+	on "(mem (symbol_ref ..))" rtl.  Look at LO_SUM base regs as well
+	as PLUS base regs.
+
 2005-08-28  Paul Brook  <paul@codesourcery.com>
 
 	* config/arm/symbian.h (SUBTARGET_ASM_FLOAT_SPEC): Default to

gcc/config/rs6000/rs6000.c

@@ -11352,18 +11352,14 @@ rs6000_split_multireg_move (rtx dst, rtx src)
 	      src = newsrc;
 	    }
 
-	  /* We have now address involving an base register only.
-	     If we use one of the registers to address memory,
-	     we have change that register last.  */
-
-	  breg = (GET_CODE (XEXP (src, 0)) == PLUS
-		  ? XEXP (XEXP (src, 0), 0)
-		  : XEXP (src, 0));
-
-	  if (!REG_P (breg))
-	      abort();
-
-	  if (REGNO (breg) >= REGNO (dst)
+	  breg = XEXP (src, 0);
+	  if (GET_CODE (breg) == PLUS || GET_CODE (breg) == LO_SUM)
+	    breg = XEXP (breg, 0);
+
+	  /* If the base register we are using to address memory is
+	     also a destination reg, then change that register last.  */
+	  if (REG_P (breg)
+	      && REGNO (breg) >= REGNO (dst)
 	      && REGNO (breg) < REGNO (dst) + nregs)
 	    j = REGNO (breg) - REGNO (dst);
         }