[es6] implement spread calls

src/x64/full-codegen-x64.cc

Index: src/x64/full-codegen-x64.cc
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index 5861327bb59ba1625a723928d5f82c76375115a2..d91fb5118c7f978f4fe3341920fda73477315ed0 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -3008,6 +3008,21 @@ void FullCodeGenerator::EmitLoadSuperConstructor() {
 }
 
 
+void FullCodeGenerator::EmitInitializeThisAfterSuper(
+    SuperReference* super_ref) {
+  Variable* this_var = super_ref->this_var()->var();
+  GetVar(rcx, this_var);
+  __ CompareRoot(rcx, Heap::kTheHoleValueRootIndex);
+  Label uninitialized_this;
+  __ j(equal, &uninitialized_this);
+  __ Push(this_var->name());
+  __ CallRuntime(Runtime::kThrowReferenceError, 1);
+  __ bind(&uninitialized_this);
+
+  EmitVariableAssignment(this_var, Token::INIT_CONST);
+}
+
+
 void FullCodeGenerator::VisitCall(Call* expr) {
 #ifdef DEBUG
   // We want to verify that RecordJSReturnSite gets called on all paths
@@ -3222,17 +3237,7 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
 
   RecordJSReturnSite(expr);
 
-  SuperReference* super_ref = expr->expression()->AsSuperReference();
-  Variable* this_var = super_ref->this_var()->var();
-  GetVar(rcx, this_var);
-  __ CompareRoot(rcx, Heap::kTheHoleValueRootIndex);
-  Label uninitialized_this;
-  __ j(equal, &uninitialized_this);
-  __ Push(this_var->name());
-  __ CallRuntime(Runtime::kThrowReferenceError, 1);
-  __ bind(&uninitialized_this);
-
-  EmitVariableAssignment(this_var, Token::INIT_CONST);
+  EmitInitializeThisAfterSuper(expr->expression()->AsSuperReference());
   context()->Plug(rax);
 }
 
@@ -4553,26 +4558,80 @@ void FullCodeGenerator::EmitDebugIsActive(CallRuntime* expr) {
 }
 
 
+void FullCodeGenerator::EmitCallSuperWithSpread(CallRuntime* expr) {
+  // Assert: expr === CallRuntime("ReflectConstruct")
+  CallRuntime* call = expr->arguments()->at(0)->AsCallRuntime();
+  ZoneList<Expression*>* args = call->arguments();
+  DCHECK_EQ(3, args->length());
+
+  SuperReference* super_reference = args->at(0)->AsSuperReference();
+
+  // Load ReflectConstruct function
+  EmitLoadJSRuntimeFunction(call);
+
+  // Push the target function under the receiver.
+  __ Push(Operand(rsp, 0));
+  __ movp(Operand(rsp, kPointerSize), rax);
+
+  // Push super
+  EmitLoadSuperConstructor();
+  __ Push(result_register());
+
+  // Push arguments array
+  VisitForStackValue(args->at(1));
+
+  // Push NewTarget
+  DCHECK(args->at(2)->IsVariableProxy());
+  VisitForStackValue(args->at(2));
+
+  EmitCallJSRuntimeFunction(call);
+
+  // Restore context register.
+  __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
+  context()->DropAndPlug(1, rax);
+
+  EmitInitializeThisAfterSuper(super_reference);
+}
+
+
+void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
+  // Push the builtins object as receiver.
+  __ movp(rax, GlobalObjectOperand());
+  __ Push(FieldOperand(rax, GlobalObject::kBuiltinsOffset));
+
+  // Load the function from the receiver.
+  __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0));
+  __ Move(LoadDescriptor::NameRegister(), expr->name());
+  if (FLAG_vector_ics) {
+    __ Move(VectorLoadICDescriptor::SlotRegister(),
+            SmiFromSlot(expr->CallRuntimeFeedbackSlot()));
+    CallLoadIC(NOT_CONTEXTUAL);
+  } else {
+    CallLoadIC(NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId());
+  }
+}
+
+
+void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  int arg_count = args->length();
+
+  // Record source position of the IC call.
+  SetSourcePosition(expr->position());
+  CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
+  __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
+  __ CallStub(&stub);
+}
+
+
 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
 
   if (expr->is_jsruntime()) {
     Comment cmnt(masm_, "[ CallRuntime");
-    // Push the builtins object as receiver.
-    __ movp(rax, GlobalObjectOperand());
-    __ Push(FieldOperand(rax, GlobalObject::kBuiltinsOffset));
 
-    // Load the function from the receiver.
-    __ movp(LoadDescriptor::ReceiverRegister(), Operand(rsp, 0));
-    __ Move(LoadDescriptor::NameRegister(), expr->name());
-    if (FLAG_vector_ics) {
-      __ Move(VectorLoadICDescriptor::SlotRegister(),
-              SmiFromSlot(expr->CallRuntimeFeedbackSlot()));
-      CallLoadIC(NOT_CONTEXTUAL);
-    } else {
-      CallLoadIC(NOT_CONTEXTUAL, expr->CallRuntimeFeedbackId());
-    }
+    EmitLoadJSRuntimeFunction(expr);
 
     // Push the target function under the receiver.
     __ Push(Operand(rsp, 0));
@@ -4583,11 +4642,7 @@ void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
       VisitForStackValue(args->at(i));
     }
 
-    // Record source position of the IC call.
-    SetSourcePosition(expr->position());
-    CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
-    __ movp(rdi, Operand(rsp, (arg_count + 1) * kPointerSize));
-    __ CallStub(&stub);
+    EmitCallJSRuntimeFunction(expr);
 
     // Restore context register.
     __ movp(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));