[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

src/compiler/js-intrinsic-lowering.cc

 // 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/js-intrinsic-lowering.h"
 
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 13 matching lines @@
     case Runtime::kDeoptimizeNow:
       return ReduceDeoptimizeNow(node);
     case Runtime::kInlineIsSmi:
       return ReduceInlineIsSmi(node);
     case Runtime::kInlineIsNonNegativeSmi:
       return ReduceInlineIsNonNegativeSmi(node);
     case Runtime::kInlineIsArray:
       return ReduceInlineIsInstanceType(node, JS_ARRAY_TYPE);
     case Runtime::kInlineIsFunction:
       return ReduceInlineIsInstanceType(node, JS_FUNCTION_TYPE);
+    case Runtime::kInlineOptimizedConstructDouble:
+      return ReduceInlineOptimizedConstructDouble(node);
+    case Runtime::kInlineOptimizedDoubleLo:
+      return ReduceInlineOptimizedDoubleLo(node);
+    case Runtime::kInlineOptimizedDoubleHi:
+      return ReduceInlineOptimizedDoubleHi(node);
     case Runtime::kInlineIsRegExp:
       return ReduceInlineIsInstanceType(node, JS_REGEXP_TYPE);
     case Runtime::kInlineValueOf:
       return ReduceInlineValueOf(node);
     default:
       break;
   }
   return NoChange();
 }
 
@@ skipping 41 matching lines @@
 Reduction JSIntrinsicLowering::ReduceInlineIsSmi(Node* node) {
   return Change(node, simplified()->ObjectIsSmi());
 }
 
 
 Reduction JSIntrinsicLowering::ReduceInlineIsNonNegativeSmi(Node* node) {
   return Change(node, simplified()->ObjectIsNonNegativeSmi());
 }
 
 
+Reduction JSIntrinsicLowering::ReduceInlineOptimizedConstructDouble(
+    Node* node) {
+  Node* high = NodeProperties::GetValueInput(node, 0);
+  Node* low = NodeProperties::GetValueInput(node, 1);
+  Node* value =
+      graph()->NewNode(machine()->Float64InsertHighWord32(),
+                       graph()->NewNode(machine()->Float64InsertLowWord32(),
+                                        jsgraph()->Constant(0), low),
+                       high);
+  NodeProperties::ReplaceWithValue(node, value);
+  return Replace(value);
+}
+
+
+Reduction JSIntrinsicLowering::ReduceInlineOptimizedDoubleLo(Node* node) {
+  return Change(node, machine()->Float64ExtractLowWord32());
+}
+
+
+Reduction JSIntrinsicLowering::ReduceInlineOptimizedDoubleHi(Node* node) {
+  return Change(node, machine()->Float64ExtractHighWord32());
+}
+
+
 Reduction JSIntrinsicLowering::ReduceInlineIsInstanceType(
     Node* node, InstanceType instance_type) {
   // if (%_IsSmi(value)) {
   //   return false;
   // } else {
   //   return %_GetInstanceType(%_GetMap(value)) == instance_type;
   // }
   MachineType const type = static_cast<MachineType>(kTypeBool | kRepTagged);
 
   Node* value = NodeProperties::GetValueInput(node, 0);
@@ skipping 120 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSIntrinsicLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8