[turbofan] Add new JSIntrinsicsLowering reducer.

src/compiler/js-intrinsic-builder.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/access-builder.h"
-#include "src/compiler/common-operator.h"
-#include "src/compiler/diamond.h"
-#include "src/compiler/js-intrinsic-builder.h"
-#include "src/compiler/js-operator.h"
-#include "src/compiler/simplified-operator.h"
-
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-ResultAndEffect JSIntrinsicBuilder::BuildGraphFor(Runtime::FunctionId id,
-                                                  const NodeVector& arguments) {
-  switch (id) {
-    case Runtime::kInlineIsSmi:
-      return BuildGraphFor_IsSmi(arguments);
-    case Runtime::kInlineIsNonNegativeSmi:
-      return BuildGraphFor_IsNonNegativeSmi(arguments);
-    case Runtime::kInlineIsArray:
-      return BuildMapCheck(arguments[0], arguments[2], JS_ARRAY_TYPE);
-    case Runtime::kInlineIsRegExp:
-      return BuildMapCheck(arguments[0], arguments[2], JS_REGEXP_TYPE);
-    case Runtime::kInlineIsFunction:
-      return BuildMapCheck(arguments[0], arguments[2], JS_FUNCTION_TYPE);
-    case Runtime::kInlineValueOf:
-      return BuildGraphFor_ValueOf(arguments);
-    default:
-      break;
-  }
-  return ResultAndEffect();
-}
-
-ResultAndEffect JSIntrinsicBuilder::BuildGraphFor_IsSmi(
-    const NodeVector& arguments) {
-  Node* object = arguments[0];
-  SimplifiedOperatorBuilder simplified(jsgraph_->zone());
-  Node* condition = graph()->NewNode(simplified.ObjectIsSmi(), object);
-
-  return ResultAndEffect(condition, arguments[2]);
-}
-
-
-ResultAndEffect JSIntrinsicBuilder::BuildGraphFor_IsNonNegativeSmi(
-    const NodeVector& arguments) {
-  Node* object = arguments[0];
-  SimplifiedOperatorBuilder simplified(jsgraph_->zone());
-  Node* condition =
-      graph()->NewNode(simplified.ObjectIsNonNegativeSmi(), object);
-
-  return ResultAndEffect(condition, arguments[2]);
-}
-
-
-/*
- * if (_isSmi(object)) {
- *   return false
- * } else {
- *   return %_GetMapInstanceType(object) == map_type
- * }
- */
-ResultAndEffect JSIntrinsicBuilder::BuildMapCheck(Node* object, Node* effect,
-                                                  InstanceType map_type) {
-  SimplifiedOperatorBuilder simplified(jsgraph_->zone());
-
-  Node* is_smi = graph()->NewNode(simplified.ObjectIsSmi(), object);
-  Diamond d(graph(), common(), is_smi);
-
-  Node* map = graph()->NewNode(simplified.LoadField(AccessBuilder::ForMap()),
-                               object, effect, d.if_false);
-
-  Node* instance_type = graph()->NewNode(
-      simplified.LoadField(AccessBuilder::ForMapInstanceType()), map, map,
-      d.if_false);
-
-  Node* has_map_type =
-      graph()->NewNode(jsgraph_->machine()->Word32Equal(), instance_type,
-                       jsgraph_->Int32Constant(map_type));
-
-  Node* phi = d.Phi(static_cast<MachineType>(kTypeBool | kRepTagged),
-                    jsgraph_->FalseConstant(), has_map_type);
-
-  Node* ephi = d.EffectPhi(effect, instance_type);
-
-  return ResultAndEffect(phi, ephi);
-}
-
-
-/*
- * if (%_isSmi(object)) {
- *   return object;
- * } else if (%_GetMapInstanceType(object) == JS_VALUE_TYPE) {
- *   return %_LoadValueField(object);
- * } else {
- *   return object;
- * }
- */
-ResultAndEffect JSIntrinsicBuilder::BuildGraphFor_ValueOf(
-    const NodeVector& arguments) {
-  Node* object = arguments[0];
-  Node* effect = arguments[2];
-  SimplifiedOperatorBuilder simplified(jsgraph_->zone());
-
-  Node* is_smi = graph()->NewNode(simplified.ObjectIsSmi(), object);
-
-  Diamond if_is_smi(graph(), common(), is_smi);
-
-  Node* map = graph()->NewNode(simplified.LoadField(AccessBuilder::ForMap()),
-                               object, effect, if_is_smi.if_false);
-
-  Node* instance_type = graph()->NewNode(
-      simplified.LoadField(AccessBuilder::ForMapInstanceType()), map, map,
-      if_is_smi.if_false);
-
-  Node* is_value =
-      graph()->NewNode(jsgraph_->machine()->Word32Equal(), instance_type,
-                       jsgraph_->Constant(JS_VALUE_TYPE));
-
-  Diamond if_is_value(graph(), common(), is_value);
-  if_is_value.Nest(if_is_smi, false);
-
-  Node* value =
-      graph()->NewNode(simplified.LoadField(AccessBuilder::ForValue()), object,
-                       instance_type, if_is_value.if_true);
-
-  Node* phi_is_value = if_is_value.Phi(kTypeAny, value, object);
-
-  Node* phi = if_is_smi.Phi(kTypeAny, object, phi_is_value);
-
-  Node* ephi = if_is_smi.EffectPhi(effect, instance_type);
-
-  return ResultAndEffect(phi, ephi);
-}
-}
-}
-}  // namespace v8::internal::compiler