[turbofan] Reduce CallConstructWithSpread where iteration is not observable.

src/compiler/js-call-reducer.h

Index: src/compiler/js-call-reducer.h
diff --git a/src/compiler/js-call-reducer.h b/src/compiler/js-call-reducer.h
index e39433a020c024fbba5c7070e5fce31e90959276..e31d9d79fdbea9e882f3ce2bc87f399643e495b4 100644
--- a/src/compiler/js-call-reducer.h
+++ b/src/compiler/js-call-reducer.h
@@ -10,6 +10,11 @@
 
 namespace v8 {
 namespace internal {
+
+// Forward declarations.
+class CompilationDependencies;
+class Factory;
+
 namespace compiler {
 
 // Forward declarations.
@@ -30,11 +35,13 @@ class JSCallReducer final : public AdvancedReducer {
   typedef base::Flags<Flag> Flags;
 
   JSCallReducer(Editor* editor, JSGraph* jsgraph, Flags flags,
-                Handle<Context> native_context)
+                Handle<Context> native_context,
+                CompilationDependencies* dependencies)
       : AdvancedReducer(editor),
         jsgraph_(jsgraph),
         flags_(flags),
-        native_context_(native_context) {}
+        native_context_(native_context),
+        dependencies_(dependencies) {}
 
   Reduction Reduce(Node* node) final;
 
@@ -49,6 +56,7 @@ class JSCallReducer final : public AdvancedReducer {
   Reduction ReduceFunctionPrototypeHasInstance(Node* node);
   Reduction ReduceObjectPrototypeGetProto(Node* node);
   Reduction ReduceJSCallConstruct(Node* node);
+  Reduction ReduceJSCallConstructWithSpread(Node* node);
   Reduction ReduceJSCallFunction(Node* node);
 
   enum HolderLookup { kHolderNotFound, kHolderIsReceiver, kHolderFound };
@@ -61,14 +69,17 @@ class JSCallReducer final : public AdvancedReducer {
   Flags flags() const { return flags_; }
   JSGraph* jsgraph() const { return jsgraph_; }
   Isolate* isolate() const;
+  Factory* factory() const;
   Handle<Context> native_context() const { return native_context_; }
   CommonOperatorBuilder* common() const;
   JSOperatorBuilder* javascript() const;
   SimplifiedOperatorBuilder* simplified() const;
+  CompilationDependencies* dependencies() const { return dependencies_; }
 
   JSGraph* const jsgraph_;
   Flags const flags_;
   Handle<Context> const native_context_;
+  CompilationDependencies* const dependencies_;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(JSCallReducer::Flags)