[es6] implement spread calls

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 661b5f962d86723482c0f08b2c574413787b4f21..a6fc9b1d1ce848cb0b5fd1fe2137e3dec208dbfa 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -92,6 +92,7 @@ namespace internal {
   V(CountOperation)             \
   V(BinaryOperation)            \
   V(CompareOperation)           \
+  V(SpreadOperation)            \
   V(ThisFunction)               \
   V(SuperReference)             \
   V(CaseClause)
@@ -2012,6 +2013,9 @@ class CallRuntime FINAL : public Expression {
     return callruntime_feedback_slot_;
   }
 
+  bool IsSuperCall() const { return is_super_call_; }
+  void SetIsSuperCall() { is_super_call_ = true; }
+
   static int num_ids() { return parent_num_ids() + 1; }
   TypeFeedbackId CallRuntimeFeedbackId() const {
     return TypeFeedbackId(local_id(0));
@@ -2025,7 +2029,8 @@ class CallRuntime FINAL : public Expression {
         raw_name_(name),
         function_(function),
         arguments_(arguments),
-        callruntime_feedback_slot_(FeedbackVectorICSlot::Invalid()) {}
+        callruntime_feedback_slot_(FeedbackVectorICSlot::Invalid()),
+        is_super_call_(false) {}
   static int parent_num_ids() { return Expression::num_ids(); }
 
  private:
@@ -2035,6 +2040,7 @@ class CallRuntime FINAL : public Expression {
   const Runtime::Function* function_;
   ZoneList<Expression*>* arguments_;
   FeedbackVectorICSlot callruntime_feedback_slot_;
+  bool is_super_call_;
 };
 
 
@@ -2241,6 +2247,26 @@ class CompareOperation FINAL : public Expression {
 };
 
 
+class SpreadOperation FINAL : public Expression {
+ public:
+  DECLARE_NODE_TYPE(SpreadOperation)
+
+  Expression* expression() const { return expression_; }
+
+  static int num_ids() { return parent_num_ids(); }
+
+ protected:
+  SpreadOperation(Zone* zone, Expression* expression, int pos)
+      : Expression(zone, pos), expression_(expression) {}
+  static int parent_num_ids() { return Expression::num_ids(); }
+
+ private:
+  int local_id(int n) const { return base_id() + parent_num_ids() + n; }
+
+  Expression* expression_;
+};
+
+
 class Conditional FINAL : public Expression {
  public:
   DECLARE_NODE_TYPE(Conditional)
@@ -3452,6 +3478,10 @@ class AstNodeFactory FINAL BASE_EMBEDDED {
     return new (zone_) CompareOperation(zone_, op, left, right, pos);
   }
 
+  SpreadOperation* NewSpreadOperation(Expression* expression, int pos) {
+    return new (zone_) SpreadOperation(zone_, expression, pos);
+  }
+
   Conditional* NewConditional(Expression* condition,
                               Expression* then_expression,
                               Expression* else_expression,