WIP: Implement ES6 Spread-calls

src/full-codegen.h

 // 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.
 
 #ifndef V8_FULL_CODEGEN_H_
 #define V8_FULL_CODEGEN_H_
 
 #include "src/v8.h"
 
 #include "src/allocation.h"
@@ skipping 353 matching lines @@
   // An operand used to read/write a stack-allocated (PARAMETER or LOCAL)
   // variable.  Writing does not need the write barrier.
   MemOperand StackOperand(Variable* var);
 
   // An operand used to read/write a known (PARAMETER, LOCAL, or CONTEXT)
   // variable.  May emit code to traverse the context chain, loading the
   // found context into the scratch register.  Writing to this operand will
   // need the write barrier if location is CONTEXT.
   MemOperand VarOperand(Variable* var, Register scratch);
 
+  // Special visitor for a spread argument, will update a scratch register with
+  // total parameter count, and push each spread value from left to right onto
+  // the stack.
+  void DoSpreadArgument(SpreadOperation* expr, Register arg_count);
+
+
   void VisitForEffect(Expression* expr) {
     EffectContext context(this);
     Visit(expr);
     PrepareForBailout(expr, NO_REGISTERS);
   }
 
   void VisitForAccumulatorValue(Expression* expr) {
     AccumulatorValueContext context(this);
     Visit(expr);
     PrepareForBailout(expr, TOS_REG);
@@ skipping 663 matching lines @@
 
   Address start_;
   Address instruction_start_;
   uint32_t length_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FULL_CODEGEN_H_