Swap bitfield3 and backpointer.

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 6b7d1163575dba03d6837d76200856681ade9b7f..5e6af47e8bb5d4a83d72776a9d1ab17c60ee85c3 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -1201,6 +1201,9 @@ class MacroAssembler: public Assembler {
   void AbortIfSmi(Register object);
   void AbortIfNotSmi(Register object);
 
+  // Abort execution if argument is not a fixed array. Used in debug code.
+  void AbortIfNotFixedArray(Register object, Register scratch);
+
   // Abort execution if argument is a string. Used in debug code.
   void AbortIfNotString(Register object);
 
@@ -1268,7 +1271,9 @@ class MacroAssembler: public Assembler {
                           DoubleRegister temp_double_reg);
 
 
-  void LoadInstanceDescriptors(Register map, Register descriptors);
+  void LoadInstanceDescriptors(Register map,
+                               Register descriptors,
+                               Register scratch);
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);