Land the Fan (disabled)

src/compiler/js-graph.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/js-graph.h"
+#include "src/compiler/node-properties-inl.h"
+#include "src/compiler/typer.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+Node* JSGraph::ImmovableHeapConstant(Handle<Object> object) {
+  PrintableUnique<Object> unique =
+      PrintableUnique<Object>::CreateImmovable(zone(), object);
+  return NewNode(common()->HeapConstant(unique));
+}
+
+
+Node* JSGraph::NewNode(Operator* op) {
+  Node* node = graph()->NewNode(op);
+  typer_->Init(node);
+  return node;
+}
+
+
+Node* JSGraph::UndefinedConstant() {
+  if (!undefined_constant_.is_set()) {
+    undefined_constant_.set(
+        ImmovableHeapConstant(factory()->undefined_value()));
+  }
+  return undefined_constant_.get();
+}
+
+
+Node* JSGraph::TheHoleConstant() {
+  if (!the_hole_constant_.is_set()) {
+    the_hole_constant_.set(ImmovableHeapConstant(factory()->the_hole_value()));
+  }
+  return the_hole_constant_.get();
+}
+
+
+Node* JSGraph::TrueConstant() {
+  if (!true_constant_.is_set()) {
+    true_constant_.set(ImmovableHeapConstant(factory()->true_value()));
+  }
+  return true_constant_.get();
+}
+
+
+Node* JSGraph::FalseConstant() {
+  if (!false_constant_.is_set()) {
+    false_constant_.set(ImmovableHeapConstant(factory()->false_value()));
+  }
+  return false_constant_.get();
+}
+
+
+Node* JSGraph::NullConstant() {
+  if (!null_constant_.is_set()) {
+    null_constant_.set(ImmovableHeapConstant(factory()->null_value()));
+  }
+  return null_constant_.get();
+}
+
+
+Node* JSGraph::ZeroConstant() {
+  if (!zero_constant_.is_set()) zero_constant_.set(NumberConstant(0.0));
+  return zero_constant_.get();
+}
+
+
+Node* JSGraph::OneConstant() {
+  if (!one_constant_.is_set()) one_constant_.set(NumberConstant(1.0));
+  return one_constant_.get();
+}
+
+
+Node* JSGraph::NaNConstant() {
+  if (!nan_constant_.is_set()) {
+    nan_constant_.set(NumberConstant(base::OS::nan_value()));
+  }
+  return nan_constant_.get();
+}
+
+
+Node* JSGraph::HeapConstant(PrintableUnique<Object> value) {
+  // TODO(turbofan): canonicalize heap constants using Unique<T>
+  return NewNode(common()->HeapConstant(value));
+}
+
+
+Node* JSGraph::HeapConstant(Handle<Object> value) {
+  // TODO(titzer): We could also match against the addresses of immortable
+  // immovables here, even without access to the heap, thus always
+  // canonicalizing references to them.
+  return HeapConstant(
+      PrintableUnique<Object>::CreateUninitialized(zone(), value));
+}
+
+
+Node* JSGraph::Constant(Handle<Object> value) {
+  // Dereference the handle to determine if a number constant or other
+  // canonicalized node can be used.
+  if (value->IsNumber()) {
+    return Constant(value->Number());
+  } else if (value->IsUndefined()) {
+    return UndefinedConstant();
+  } else if (value->IsTrue()) {
+    return TrueConstant();
+  } else if (value->IsFalse()) {
+    return FalseConstant();
+  } else if (value->IsNull()) {
+    return NullConstant();
+  } else if (value->IsTheHole()) {
+    return TheHoleConstant();
+  } else {
+    return HeapConstant(value);
+  }
+}
+
+
+Node* JSGraph::Constant(double value) {
+  if (BitCast<int64_t>(value) == BitCast<int64_t>(0.0)) return ZeroConstant();
+  if (BitCast<int64_t>(value) == BitCast<int64_t>(1.0)) return OneConstant();
+  return NumberConstant(value);
+}
+
+
+Node* JSGraph::Constant(int32_t value) {
+  if (value == 0) return ZeroConstant();
+  if (value == 1) return OneConstant();
+  return NumberConstant(value);
+}
+
+
+Node* JSGraph::Int32Constant(int32_t value) {
+  Node** loc = cache_.FindInt32Constant(value);
+  if (*loc == NULL) {
+    *loc = NewNode(common()->Int32Constant(value));
+  }
+  return *loc;
+}
+
+
+Node* JSGraph::NumberConstant(double value) {
+  Node** loc = cache_.FindNumberConstant(value);
+  if (*loc == NULL) {
+    *loc = NewNode(common()->NumberConstant(value));
+  }
+  return *loc;
+}
+
+
+Node* JSGraph::Float64Constant(double value) {
+  Node** loc = cache_.FindFloat64Constant(value);
+  if (*loc == NULL) {
+    *loc = NewNode(common()->Float64Constant(value));
+  }
+  return *loc;
+}
+
+
+Node* JSGraph::ExternalConstant(ExternalReference reference) {
+  Node** loc = cache_.FindExternalConstant(reference);
+  if (*loc == NULL) {
+    *loc = NewNode(common()->ExternalConstant(reference));
+  }
+  return *loc;
+}
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8