[turbofan] Replace uninitialized JSCall nodes with SOFT deopt.

src/compiler/js-call-reducer.h

 // 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.
 
 #ifndef V8_COMPILER_JS_CALL_REDUCER_H_
 #define V8_COMPILER_JS_CALL_REDUCER_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/graph-reducer.h"
 
@@ skipping 10 matching lines @@
 class CallFrequency;
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
 class SimplifiedOperatorBuilder;
 
 // Performs strength reduction on {JSConstruct} and {JSCall} nodes,
 // which might allow inlining or other optimizations to be performed afterwards.
 class JSCallReducer final : public AdvancedReducer {
  public:
-  JSCallReducer(Editor* editor, JSGraph* jsgraph,
+  // Flags that control the mode of operation.
+  enum Flag { kNoFlags = 0u, kBailoutOnUninitialized = 1u << 0 };
+  typedef base::Flags<Flag> Flags;
+
+  JSCallReducer(Editor* editor, JSGraph* jsgraph, Flags flags,
                 Handle<Context> native_context,
                 CompilationDependencies* dependencies)
       : AdvancedReducer(editor),
         jsgraph_(jsgraph),
+        flags_(flags),
         native_context_(native_context),
         dependencies_(dependencies) {}
 
   Reduction Reduce(Node* node) final;
 
  private:
   Reduction ReduceArrayConstructor(Node* node);
   Reduction ReduceBooleanConstructor(Node* node);
   Reduction ReduceCallApiFunction(
       Node* node, Handle<FunctionTemplateInfo> function_template_info);
@@ skipping 21 matching lines @@
 
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
   Factory* factory() const;
   Handle<Context> native_context() const { return native_context_; }
   Handle<JSGlobalProxy> global_proxy() const;
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
+  Flags flags() const { return flags_; }
   CompilationDependencies* dependencies() const { return dependencies_; }
 
   JSGraph* const jsgraph_;
+  Flags const flags_;
   Handle<Context> const native_context_;
   CompilationDependencies* const dependencies_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_CALL_REDUCER_H_