Fixes ARM multiplication instruction version checking.

runtime/vm/assembler_arm.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 420 matching lines @@
   void mls(Register rd, Register rn, Register rm, Register ra,
            Condition cond = AL);
   void smull(Register rd_lo, Register rd_hi, Register rn, Register rm,
              Condition cond = AL);
   void umull(Register rd_lo, Register rd_hi, Register rn, Register rm,
              Condition cond = AL);
   void smlal(Register rd_lo, Register rd_hi, Register rn, Register rm,
              Condition cond = AL);
   void umlal(Register rd_lo, Register rd_hi, Register rn, Register rm,
              Condition cond = AL);
-  void umaal(Register rd_lo, Register rd_hi, Register rn, Register rm,
-             Condition cond = AL);
+
+  // Emulation of this instruction uses IP and the condition codes. Therefore,
+  // none of the registers can be IP, and the instruction can only be used
+  // unconditionally.
+  void umaal(Register rd_lo, Register rd_hi, Register rn, Register rm);
 
   // Division instructions.
   void sdiv(Register rd, Register rn, Register rm, Condition cond = AL);
   void udiv(Register rd, Register rn, Register rm, Condition cond = AL);
 
   // Load/store instructions.
   void ldr(Register rd, Address ad, Condition cond = AL);
   void str(Register rd, Address ad, Condition cond = AL);
 
   void ldrb(Register rd, Address ad, Condition cond = AL);
@@ skipping 662 matching lines @@
                      Register new_value,
                      FieldContent old_content);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_