CodeStubAssembler can generate code for builtins

src/compiler/raw-machine-assembler.cc

 // Copyright 2014 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/raw-machine-assembler.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/pipeline.h"
 #include "src/compiler/scheduler.h"
@@ skipping 230 matching lines @@
     buffer[index++] = args[i];
   }
   Node* tail_call = MakeNode(common()->TailCall(desc), input_count, buffer);
   NodeProperties::MergeControlToEnd(graph(), common(), tail_call);
   schedule()->AddTailCall(CurrentBlock(), tail_call);
   current_block_ = nullptr;
   return tail_call;
 }
 
 
+Node* RawMachineAssembler::TailCallRuntime0(Runtime::FunctionId function,
+                                            Node* context) {
+  const int kArity = 0;
+  CallDescriptor* desc = Linkage::GetRuntimeCallDescriptor(
+      zone(), function, kArity, Operator::kNoProperties,
+      CallDescriptor::kSupportsTailCalls);
+  int return_count = static_cast<int>(desc->ReturnCount());
+
+  Node* centry = HeapConstant(CEntryStub(isolate(), return_count).GetCode());
+  Node* ref = AddNode(
+      common()->ExternalConstant(ExternalReference(function, isolate())));
+  Node* arity = Int32Constant(kArity);
+
+  Node* nodes[] = {centry, ref, arity, context};
+  Node* tail_call = MakeNode(common()->TailCall(desc), arraysize(nodes), nodes);
+
+  NodeProperties::MergeControlToEnd(graph(), common(), tail_call);
+  schedule()->AddTailCall(CurrentBlock(), tail_call);
+  current_block_ = nullptr;
+  return tail_call;
+}
+
+
 Node* RawMachineAssembler::TailCallRuntime1(Runtime::FunctionId function,
                                             Node* arg1, Node* context) {
   const int kArity = 1;
   CallDescriptor* desc = Linkage::GetRuntimeCallDescriptor(
       zone(), function, kArity, Operator::kNoProperties,
       CallDescriptor::kSupportsTailCalls);
   int return_count = static_cast<int>(desc->ReturnCount());
 
   Node* centry = HeapConstant(CEntryStub(isolate(), return_count).GetCode());
   Node* ref = AddNode(
@@ skipping 201 matching lines @@
 
 RawMachineLabel::RawMachineLabel()
     : block_(nullptr), used_(false), bound_(false) {}
 
 
 RawMachineLabel::~RawMachineLabel() { DCHECK(bound_ || !used_); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8