Fix issues with Arm's use of embedded constant pools

src/x64/assembler-x64.cc

 // Copyright 2012 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.
 
 #include "src/x64/assembler-x64.h"
 
 #include <cstring>
 
 #if V8_TARGET_ARCH_X64
 
@@ skipping 298 matching lines @@
 }
 
 
 void Assembler::Align(int m) {
   DCHECK(base::bits::IsPowerOfTwo32(m));
   int delta = (m - (pc_offset() & (m - 1))) & (m - 1);
   Nop(delta);
 }
 
 
+void Assembler::DataAlign(int m) {
+  DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
+  while ((pc_offset() & (m - 1)) != 0) {
+    db(0);
+  }
+}
+
+
 void Assembler::CodeTargetAlign() {
   Align(16);  // Preferred alignment of jump targets on x64.
 }
 
 
 bool Assembler::IsNop(Address addr) {
   Address a = addr;
   while (*a == 0x66) a++;
   if (*a == 0x90) return true;
   if (a[0] == 0xf && a[1] == 0x1f) return true;
@@ skipping 3614 matching lines @@
 
 bool RelocInfo::IsInConstantPool() {
   return false;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64