[turbofan] Sparse representation for state values

src/compiler/js-native-context-specialization.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-native-context-specialization.h"
 
 #include "src/accessors.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
@@ skipping 988 matching lines @@
       case AccessMode::kLoad: {
         // We need a FrameState for the getter stub to restore the correct
         // context before returning to fullcodegen.
         FrameStateFunctionInfo const* frame_info0 =
             common()->CreateFrameStateFunctionInfo(FrameStateType::kGetterStub,
                                                    1, 0, shared_info);
         Node* frame_state0 = graph()->NewNode(
             common()->FrameState(BailoutId::None(),
                                  OutputFrameStateCombine::Ignore(),
                                  frame_info0),
-            graph()->NewNode(common()->StateValues(1), receiver),
+            graph()->NewNode(common()->StateValues(1, SparseInputMask::Dense()),
+                             receiver),
             jsgraph()->EmptyStateValues(), jsgraph()->EmptyStateValues(),
             context, target, frame_state);
 
         // Introduce the call to the getter function.
         if (access_info.constant()->IsJSFunction()) {
           value = effect = graph()->NewNode(
               javascript()->CallFunction(
                   2, 0.0f, VectorSlotPair(),
                   ConvertReceiverMode::kNotNullOrUndefined),
               target, receiver, context, frame_state0, effect, control);
@@ skipping 16 matching lines @@
       case AccessMode::kStore: {
         // We need a FrameState for the setter stub to restore the correct
         // context and return the appropriate value to fullcodegen.
         FrameStateFunctionInfo const* frame_info0 =
             common()->CreateFrameStateFunctionInfo(FrameStateType::kSetterStub,
                                                    2, 0, shared_info);
         Node* frame_state0 = graph()->NewNode(
             common()->FrameState(BailoutId::None(),
                                  OutputFrameStateCombine::Ignore(),
                                  frame_info0),
-            graph()->NewNode(common()->StateValues(2), receiver, value),
+            graph()->NewNode(common()->StateValues(2, SparseInputMask::Dense()),
+                             receiver, value),
             jsgraph()->EmptyStateValues(), jsgraph()->EmptyStateValues(),
             context, target, frame_state);
 
         // Introduce the call to the setter function.
         if (access_info.constant()->IsJSFunction()) {
           effect = graph()->NewNode(
               javascript()->CallFunction(
                   3, 0.0f, VectorSlotPair(),
                   ConvertReceiverMode::kNotNullOrUndefined),
               target, receiver, value, context, frame_state0, effect, control);
@@ skipping 775 matching lines @@
   return jsgraph()->javascript();
 }
 
 SimplifiedOperatorBuilder* JSNativeContextSpecialization::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8