[WIP] Start adding JSCallWithVarargs

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 731a45ed7c961d734b22294723bf0a8210464110..19d8ef16a5de04673bc58e411f7759ba5c745c70 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -632,6 +632,24 @@ void JSGenericLowering::LowerJSConstructWithSpread(Node* node) {
   NodeProperties::ChangeOp(node, common()->Call(desc));
 }
 
+void JSGenericLowering::LowerJSCall(Node* node) {
+  CallParameters const& p = CallParametersOf(node->op());
+  int const arg_count = static_cast<int>(p.arity() - 2);
+  ConvertReceiverMode const mode = p.convert_mode();
+  Callable callable = CodeFactory::Call(isolate(), mode);
+  CallDescriptor::Flags flags = FrameStateFlagForCall(node);
+  if (p.tail_call_mode() == TailCallMode::kAllow) {
+    flags |= CallDescriptor::kSupportsTailCalls;
+  }
+  CallDescriptor* desc = Linkage::GetStubCallDescriptor(
+      isolate(), zone(), callable.descriptor(), arg_count + 1, flags);
+  Node* stub_code = jsgraph()->HeapConstant(callable.code());
+  Node* stub_arity = jsgraph()->Int32Constant(arg_count);
+  node->InsertInput(zone(), 0, stub_code);
+  node->InsertInput(zone(), 2, stub_arity);
+  NodeProperties::ChangeOp(node, common()->Call(desc));
+}
+
 void JSGenericLowering::LowerJSCallForwardVarargs(Node* node) {
   CallForwardVarargsParameters p = CallForwardVarargsParametersOf(node->op());
   int const arg_count = static_cast<int>(p.arity() - 2);
@@ -651,21 +669,23 @@ void JSGenericLowering::LowerJSCallForwardVarargs(Node* node) {
   NodeProperties::ChangeOp(node, common()->Call(desc));
 }
 
-void JSGenericLowering::LowerJSCall(Node* node) {
-  CallParameters const& p = CallParametersOf(node->op());
+void JSGenericLowering::LowerJSCallVarargs(Node* node) {
+  CallVarargsParameters p = CallVarargsParametersOf(node->op());
   int const arg_count = static_cast<int>(p.arity() - 2);
-  ConvertReceiverMode const mode = p.convert_mode();
-  Callable callable = CodeFactory::Call(isolate(), mode);
   CallDescriptor::Flags flags = FrameStateFlagForCall(node);
-  if (p.tail_call_mode() == TailCallMode::kAllow) {
-    flags |= CallDescriptor::kSupportsTailCalls;
-  }
+  Callable callable = CodeFactory::CallVarargs(isolate());
   CallDescriptor* desc = Linkage::GetStubCallDescriptor(
       isolate(), zone(), callable.descriptor(), arg_count + 1, flags);
   Node* stub_code = jsgraph()->HeapConstant(callable.code());
   Node* stub_arity = jsgraph()->Int32Constant(arg_count);
+  Node* arguments_list = node->InputAt(arg_count + 2);
+  Node* arguments_length = node->InputAt(arg_count + 3);
+  node->RemoveInput(arg_count + 3);
+  node->RemoveInput(arg_count + 2);
   node->InsertInput(zone(), 0, stub_code);
   node->InsertInput(zone(), 2, stub_arity);
+  node->InsertInput(zone(), 3, arguments_list);
+  node->InsertInput(zone(), 4, arguments_length);
   NodeProperties::ChangeOp(node, common()->Call(desc));
 }