[stubs] A new approach to TF stubs

src/compiler/code-stub-assembler.cc

Index: src/compiler/code-stub-assembler.cc
diff --git a/src/compiler/code-stub-assembler.cc b/src/compiler/code-stub-assembler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ae1f2cd5a7f1e0db14204ff62b032a6ea9ec6285
--- /dev/null
+++ b/src/compiler/code-stub-assembler.cc
@@ -0,0 +1,196 @@
+// Copyright 2015 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/code-stub-assembler.h"
+
+#include <ostream>
+
+#include "src/code-factory.h"
+#include "src/compiler/graph.h"
+#include "src/compiler/instruction-selector.h"
+#include "src/compiler/linkage.h"
+#include "src/compiler/machine-type.h"
+#include "src/compiler/pipeline.h"
+#include "src/compiler/raw-machine-assembler.h"
+#include "src/compiler/schedule.h"
+#include "src/frames.h"
+#include "src/interface-descriptors.h"
+#include "src/interpreter/bytecodes.h"
+#include "src/macro-assembler.h"
+#include "src/zone.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+
+CodeStubAssembler::CodeStubAssembler(Isolate* isolate, Zone* zone,
+                                     const CallInterfaceDescriptor& descriptor,
+                                     Code::Kind kind, const char* name)
+    : raw_assembler_(new RawMachineAssembler(
+          isolate, new (zone) Graph(zone),
+          Linkage::GetStubCallDescriptor(isolate, zone, descriptor, 0,
+                                         CallDescriptor::kNoFlags))),
+      end_nodes_(zone),
+      kind_(kind),
+      name_(name),
+      code_generated_(false) {}
+
+
+CodeStubAssembler::~CodeStubAssembler() {}
+
+
+Handle<Code> CodeStubAssembler::GenerateCode() {
+  DCHECK(!code_generated_);
+
+  End();
+
+  Schedule* schedule = raw_assembler_->Export();
+  Handle<Code> code = Pipeline::GenerateCodeForCodeStub(
+      isolate(), raw_assembler_->call_descriptor(), graph(), schedule, kind_,
+      name_);
+
+  code_generated_ = true;
+  return code;
+}
+
+
+Node* CodeStubAssembler::Int32Constant(int value) {
+  return raw_assembler_->Int32Constant(value);
+}
+
+
+Node* CodeStubAssembler::IntPtrConstant(intptr_t value) {
+  return raw_assembler_->IntPtrConstant(value);
+}
+
+
+Node* CodeStubAssembler::NumberConstant(double value) {
+  return raw_assembler_->NumberConstant(value);
+}
+
+
+Node* CodeStubAssembler::HeapConstant(Handle<HeapObject> object) {
+  return raw_assembler_->HeapConstant(object);
+}
+
+
+Node* CodeStubAssembler::BooleanConstant(bool value) {
+  return raw_assembler_->BooleanConstant(value);
+}
+
+
+Node* CodeStubAssembler::Parameter(int value) {
+  return raw_assembler_->Parameter(value);
+}
+
+
+void CodeStubAssembler::Return(Node* value) {
+  return raw_assembler_->Return(value);
+}
+
+
+Node* CodeStubAssembler::SmiShiftBitsConstant() {
+  return Int32Constant(kSmiShiftSize + kSmiTagSize);
+}
+
+
+Node* CodeStubAssembler::SmiTag(Node* value) {
+  return raw_assembler_->WordShl(value, SmiShiftBitsConstant());
+}
+
+
+Node* CodeStubAssembler::SmiUntag(Node* value) {
+  return raw_assembler_->WordSar(value, SmiShiftBitsConstant());
+}
+
+
+Node* CodeStubAssembler::IntPtrAdd(Node* a, Node* b) {
+  return raw_assembler_->IntPtrAdd(a, b);
+}
+
+
+Node* CodeStubAssembler::IntPtrSub(Node* a, Node* b) {
+  return raw_assembler_->IntPtrSub(a, b);
+}
+
+
+Node* CodeStubAssembler::WordShl(Node* value, int shift) {
+  return raw_assembler_->WordShl(value, Int32Constant(shift));
+}
+
+
+Node* CodeStubAssembler::LoadObjectField(Node* object, int offset) {
+  return raw_assembler_->Load(kMachAnyTagged, object,
+                              IntPtrConstant(offset - kHeapObjectTag));
+}
+
+
+Node* CodeStubAssembler::CallN(CallDescriptor* descriptor, Node* code_target,
+                               Node** args) {
+  return raw_assembler_->CallN(descriptor, code_target, args);
+}
+
+
+Node* CodeStubAssembler::TailCallN(CallDescriptor* descriptor,
+                                   Node* code_target, Node** args) {
+  return raw_assembler_->TailCallN(descriptor, code_target, args);
+}
+
+
+Node* CodeStubAssembler::CallRuntime(Runtime::FunctionId function_id,
+                                     Node* context, Node* arg1) {
+  return raw_assembler_->CallRuntime1(function_id, arg1, context);
+}
+
+
+Node* CodeStubAssembler::CallRuntime(Runtime::FunctionId function_id,
+                                     Node* context, Node* arg1, Node* arg2) {
+  return raw_assembler_->CallRuntime2(function_id, arg1, arg2, context);
+}
+
+
+Node* CodeStubAssembler::TailCallRuntime(Runtime::FunctionId function_id,
+                                         Node* context, Node* arg1) {
+  return raw_assembler_->TailCallRuntime1(function_id, arg1, context);
+}
+
+
+Node* CodeStubAssembler::TailCallRuntime(Runtime::FunctionId function_id,
+                                         Node* context, Node* arg1,
+                                         Node* arg2) {
+  return raw_assembler_->TailCallRuntime2(function_id, arg1, arg2, context);
+}
+
+
+void CodeStubAssembler::AddEndInput(Node* input) {
+  DCHECK_NOT_NULL(input);
+  end_nodes_.push_back(input);
+}
+
+
+void CodeStubAssembler::End() {
+  if (end_nodes_.size() == 0) {
+    end_nodes_.push_back(graph()->start());
+  }
+  int end_count = static_cast<int>(end_nodes_.size());
+  Node* end = graph()->NewNode(raw_assembler_->common()->End(end_count),
+                               end_count, &end_nodes_[0]);
+  graph()->SetEnd(end);
+}
+
+
+// RawMachineAssembler delegate helpers:
+Isolate* CodeStubAssembler::isolate() { return raw_assembler_->isolate(); }
+
+
+Graph* CodeStubAssembler::graph() { return raw_assembler_->graph(); }
+
+
+Zone* CodeStubAssembler::zone() { return raw_assembler_->zone(); }
+
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8