[turbofan] Make global variable loads and stores explicit.

src/compiler/js-typed-lowering.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/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 783 matching lines @@
   Node* const input = node->InputAt(0);
   Reduction reduction = ReduceJSToStringInput(input);
   if (reduction.Changed()) {
     ReplaceWithValue(node, reduction.replacement());
     return reduction;
   }
   return NoChange();
 }
 
 
-Reduction JSTypedLowering::ReduceJSLoadNamed(Node* node) {
-  Node* object = NodeProperties::GetValueInput(node, 0);
-  Type* object_type = NodeProperties::GetBounds(object).upper;
-  if (object_type->Is(Type::GlobalObject())) {
-    // Optimize global constants like "undefined", "Infinity", and "NaN".
-    Handle<Name> name = LoadNamedParametersOf(node->op()).name().handle();
-    Handle<Object> constant_value = factory()->GlobalConstantFor(name);
-    if (!constant_value.is_null()) {
-      Node* constant = jsgraph()->Constant(constant_value);
-      ReplaceWithValue(node, constant);
-      return Replace(constant);
-    }
+Reduction JSTypedLowering::ReduceJSLoadGlobal(Node* node) {
+  // Optimize global constants like "undefined", "Infinity", and "NaN".
+  Handle<Name> name = LoadGlobalParametersOf(node->op()).name().handle();
+  Handle<Object> constant_value = factory()->GlobalConstantFor(name);
+  if (!constant_value.is_null()) {
+    Node* constant = jsgraph()->Constant(constant_value);
+    ReplaceWithValue(node, constant);
+    return Replace(constant);
   }
   return NoChange();
 }
 
 
 Reduction JSTypedLowering::ReduceJSLoadProperty(Node* node) {
   Node* key = NodeProperties::GetValueInput(node, 1);
   Node* base = NodeProperties::GetValueInput(node, 0);
   Type* key_type = NodeProperties::GetBounds(key).upper;
   HeapObjectMatcher mbase(base);
@@ skipping 190 matching lines @@
     check_false->AppendInput(graph()->zone(), if_false);
     check_true = if_true;
   }
 
   // Fast case, because variable is not shadowed. Perform global object load.
   Unique<Name> name = Unique<Name>::CreateUninitialized(access.name());
   Node* global = graph()->NewNode(
       javascript()->LoadContext(0, Context::GLOBAL_OBJECT_INDEX, true), context,
       context, effect);
   Node* fast = graph()->NewNode(
-      javascript()->LoadNamed(name, access.feedback(), access.mode()), global,
+      javascript()->LoadGlobal(name, access.feedback(), access.mode()), global,
       vector, context, state1, state2, global, check_true);
 
   // Slow case, because variable potentially shadowed. Perform dynamic lookup.
   uint32_t check_bitset = DynamicGlobalAccess::kFullCheckRequired;
   Node* slow = graph()->NewNode(
       javascript()->LoadDynamicGlobal(access.name(), check_bitset,
                                       access.feedback(), access.mode()),
       vector, context, context, state1, state2, effect, check_false);
 
   // Replace value, effect and control uses accordingly.
@@ skipping 595 matching lines @@
     case IrOpcode::kJSModulus:
       return ReduceJSModulus(node);
     case IrOpcode::kJSUnaryNot:
       return ReduceJSUnaryNot(node);
     case IrOpcode::kJSToBoolean:
       return ReduceJSToBoolean(node);
     case IrOpcode::kJSToNumber:
       return ReduceJSToNumber(node);
     case IrOpcode::kJSToString:
       return ReduceJSToString(node);
-    case IrOpcode::kJSLoadNamed:
-      return ReduceJSLoadNamed(node);
+    case IrOpcode::kJSLoadGlobal:
+      return ReduceJSLoadGlobal(node);
     case IrOpcode::kJSLoadProperty:
       return ReduceJSLoadProperty(node);
     case IrOpcode::kJSStoreProperty:
       return ReduceJSStoreProperty(node);
     case IrOpcode::kJSLoadContext:
       return ReduceJSLoadContext(node);
     case IrOpcode::kJSStoreContext:
       return ReduceJSStoreContext(node);
     case IrOpcode::kJSLoadDynamicGlobal:
       return ReduceJSLoadDynamicGlobal(node);
@@ skipping 52 matching lines @@
 }
 
 
 MachineOperatorBuilder* JSTypedLowering::machine() const {
   return jsgraph()->machine();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8