[turbofan] Fix bug in object state generation of escape analysis.

src/compiler/escape-analysis-reducer.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/escape-analysis-reducer.h"
 
 #include "src/compiler/js-graph.h"
 #include "src/counters.h"
 
 namespace v8 {
@@ skipping 228 matching lines @@
 // Returns the clone if it duplicated the node, and null otherwise.
 Node* EscapeAnalysisReducer::ReduceStateValueInputs(Node* node, Node* effect,
                                                     bool multiple_users) {
   if (FLAG_trace_turbo_escape) {
     PrintF("Reducing StateValue #%d\n", node->id());
   }
   DCHECK(node->opcode() == IrOpcode::kStateValues);
   DCHECK_NOT_NULL(effect);
   Node* clone = nullptr;
   for (int i = 0; i < node->op()->ValueInputCount(); ++i) {
-    if (Node* ret = ReduceStateValueInput(node, i, effect, multiple_users)) {
+    Node* input = NodeProperties::GetValueInput(node, i);
+    Node* ret = nullptr;
+    if (input->opcode() == IrOpcode::kStateValues) {
+      ret = ReduceStateValueInputs(input, effect, multiple_users);
+    } else {
+      ret = ReduceStateValueInput(node, i, effect, multiple_users);
+    }
+    if (ret) {
       node = ret;
       DCHECK_NULL(clone);
       clone = ret;
       multiple_users = false;
     }
   }
   return clone;
 }
 
 
@@ skipping 37 matching lines @@
 }
 
 
 Counters* EscapeAnalysisReducer::counters() const {
   return jsgraph_->isolate()->counters();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8