[turbofan] Sparse representation for state values

test/cctest/compiler/test-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/compilation-dependencies.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/opcodes.h"
@@ skipping 59 matching lines @@
   Node* UndefinedConstant() {
     Handle<HeapObject> value = isolate->factory()->undefined_value();
     return graph.NewNode(common.HeapConstant(value));
   }
 
   Node* HeapConstant(Handle<HeapObject> constant) {
     return graph.NewNode(common.HeapConstant(constant));
   }
 
   Node* EmptyFrameState(Node* context) {
-    Node* parameters = graph.NewNode(common.StateValues(0));
-    Node* locals = graph.NewNode(common.StateValues(0));
-    Node* stack = graph.NewNode(common.StateValues(0));
+    Node* parameters =
+        graph.NewNode(common.StateValues(0, SparseInputMask::Dense()));
+    Node* locals =
+        graph.NewNode(common.StateValues(0, SparseInputMask::Dense()));
+    Node* stack =
+        graph.NewNode(common.StateValues(0, SparseInputMask::Dense()));
 
     Node* state_node = graph.NewNode(
         common.FrameState(BailoutId::None(), OutputFrameStateCombine::Ignore(),
                           nullptr),
         parameters, locals, stack, context, UndefinedConstant(), graph.start());
 
     return state_node;
   }
 
   Node* reduce(Node* node) {
@@ skipping 1147 matching lines @@
           CHECK_EQ(p1, r->InputAt(1));
         }
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8