Fix issues with Arm's use of embedded constant pools

src/arm64/assembler-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ARM64_ASSEMBLER_ARM64_H_
 #define V8_ARM64_ASSEMBLER_ARM64_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 833 matching lines @@
   // Assembler functions are invoked in between GetCode() calls.
   //
   // The descriptor (desc) can be NULL. In that case, the code is finalized as
   // usual, but the descriptor is not populated.
   void GetCode(CodeDesc* desc);
 
   // Insert the smallest number of nop instructions
   // possible to align the pc offset to a multiple
   // of m. m must be a power of 2 (>= 4).
   void Align(int m);
+  // Insert the smallest number of zero bytes possible to align the pc offset
+  // to a mulitple of m. m must be a power of 2 (>= 2).
+  void DataAlign(int m);
 
   inline void Unreachable();
 
   // Label --------------------------------------------------------------------
   // Bind a label to the current pc. Note that labels can only be bound once,
   // and if labels are linked to other instructions, they _must_ be bound
   // before they go out of scope.
   void bind(Label* label);
 
 
@@ skipping 1456 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBufferSpace();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_ASSEMBLER_ARM64_H_