Store offset between fixed typed array base and data start in object

src/x64/lithium-codegen-x64.cc

 // 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 440 matching lines @@
   DCHECK(op->IsDoubleRegister());
   return ToDoubleRegister(op->index());
 }
 
 
 bool LCodeGen::IsInteger32Constant(LConstantOperand* op) const {
   return chunk_->LookupLiteralRepresentation(op).IsSmiOrInteger32();
 }
 
 
+bool LCodeGen::IsExternalConstant(LConstantOperand* op) const {
+  return chunk_->LookupLiteralRepresentation(op).IsExternal();
+}
+
+
 bool LCodeGen::IsDehoistedKeyConstant(LConstantOperand* op) const {
   return op->IsConstantOperand() &&
       chunk_->IsDehoistedKey(chunk_->LookupConstant(op));
 }
 
 
 bool LCodeGen::IsSmiConstant(LConstantOperand* op) const {
   return chunk_->LookupLiteralRepresentation(op).IsSmi();
 }
 
@@ skipping 3740 matching lines @@
     if (IsInteger32Constant(operand_value)) {
       DCHECK(!hinstr->NeedsWriteBarrier());
       int32_t value = ToInteger32(operand_value);
       if (representation.IsSmi()) {
         __ Move(operand, Smi::FromInt(value));
 
       } else {
         __ movl(operand, Immediate(value));
       }
 
+    } else if (IsExternalConstant(operand_value)) {
+      DCHECK(!hinstr->NeedsWriteBarrier());
+      ExternalReference ptr = ToExternalReference(operand_value);
+      __ Move(kScratchRegister, ptr);
+      __ movp(operand, kScratchRegister);
     } else {
       Handle<Object> handle_value = ToHandle(operand_value);
       DCHECK(!hinstr->NeedsWriteBarrier());
       __ Move(operand, handle_value);
     }
   }
 
   if (hinstr->NeedsWriteBarrier()) {
     Register value = ToRegister(instr->value());
     Register temp = access.IsInobject() ? ToRegister(instr->temp()) : object;
@@ skipping 1822 matching lines @@
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64