[Interpreter] Add support for JS runtime calls.

src/compiler/interpreter-assembler.cc

 // Copyright 2015 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/compiler/interpreter-assembler.h"
 
 #include <ostream>
 
 #include "src/code-factory.h"
 #include "src/compiler/graph.h"
@@ skipping 208 matching lines @@
           interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
       return BytecodeOperandShort(operand_index);
     default:
       UNREACHABLE();
       return nullptr;
   }
 }
 
 
 Node* InterpreterAssembler::BytecodeOperandReg(int operand_index) {
-  DCHECK_EQ(interpreter::OperandType::kReg8,
-            interpreter::Bytecodes::GetOperandType(bytecode_, operand_index));
+#ifdef DEBUG
+  interpreter::OperandType operand_type =
+      interpreter::Bytecodes::GetOperandType(bytecode_, operand_index);
+  DCHECK(operand_type == interpreter::OperandType::kReg8 ||
+         operand_type == interpreter::OperandType::kMaybeReg8);
+#endif
   return BytecodeOperandSignExtended(operand_index);
 }
 
 
 Node* InterpreterAssembler::Int32Constant(int value) {
   return raw_assembler_->Int32Constant(value);
 }
 
 
 Node* InterpreterAssembler::IntPtrConstant(intptr_t value) {
@@ skipping 401 matching lines @@
   return raw_assembler_->schedule();
 }
 
 
 Zone* InterpreterAssembler::zone() { return raw_assembler_->zone(); }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8