[backport from gcc-4.7/trunk <mikpe@it.uu.se>]

gcc/

2011-06-27  Richard Earnshaw  <rearnsha@arm.com>

	PR target/48637
	* arm.c (arm_print_operand): Allow sym+offset.  Don't abort on invalid
	asm operands.

--- gcc-4.6.1/gcc/config/arm/arm.c.~1~	2011-05-05 10:39:40.000000000 +0200
+++ gcc-4.6.1/gcc/config/arm/arm.c	2011-07-05 14:53:33.000000000 +0200
@@ -16143,8 +16143,17 @@ arm_print_operand (FILE *stream, rtx x, 
 	  output_addr_const (stream, x);
 	  break;
 
+	case CONST:
+	  if (GET_CODE (XEXP (x, 0)) == PLUS
+	      && GET_CODE (XEXP (XEXP (x, 0), 0)) == SYMBOL_REF)
+	    {
+	      output_addr_const (stream, x);
+	      break;
+	    }
+	  /* Fall through.  */
+
 	default:
-	  gcc_unreachable ();
+	  output_operand_lossage ("Unsupported operand for code '%c'", code);
 	}
       return;