Compile FastCloneShallowArrayStub using Crankshaft.

src/code-stubs-hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 148 matching lines @@
   explicit CodeStubGraphBuilder(Stub* stub)
       : CodeStubGraphBuilderBase(Isolate::Current(), stub) {}
 
  protected:
   virtual HValue* BuildCodeStub();
   Stub* casted_stub() { return static_cast<Stub*>(stub()); }
 };
 
 
 template <>
+HValue* CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub() {
+  Zone* zone = this->zone();
+  Factory* factory = isolate()->factory();
+  AllocationSiteMode alloc_site_mode = casted_stub()->allocation_site_mode();
+  FastCloneShallowArrayStub::Mode mode = casted_stub()->mode();
+  int length = casted_stub()->length();
+
+  HInstruction* boilerplate =
+      AddInstruction(new(zone) HLoadKeyed(GetParameter(0),
+                                          GetParameter(1),
+                                          NULL,
+                                          FAST_ELEMENTS));
+
+  CheckBuilder builder(this, BailoutId::StubEntry());
+  builder.CheckNotUndefined(boilerplate);
+
+  if (mode == FastCloneShallowArrayStub::CLONE_ANY_ELEMENTS) {
+    HValue* elements =
+        AddInstruction(new(zone) HLoadElements(boilerplate, NULL));
+
+    IfBuilder if_fixed_cow(this, BailoutId::StubEntry());
+    if_fixed_cow.BeginCompareMapTrue(elements, factory->fixed_cow_array_map());
+    environment()->Push(BuildCloneShallowArray(context(),
+                                               boilerplate,
+                                               alloc_site_mode,
+                                               FAST_ELEMENTS,
+                                               BailoutId::StubEntry(),
+                                               0/*copy-on-write*/));
+    if_fixed_cow.BeginFalse();
+
+    IfBuilder if_fixed(this, BailoutId::StubEntry());
+    if_fixed.BeginCompareMapTrue(elements, factory->fixed_array_map());
+    environment()->Push(BuildCloneShallowArray(context(),
+                                               boilerplate,
+                                               alloc_site_mode,
+                                               FAST_ELEMENTS,
+                                               BailoutId::StubEntry(),
+                                               length));
+    if_fixed.BeginFalse();
+
+    environment()->Push(BuildCloneShallowArray(context(),
+                                               boilerplate,
+                                               alloc_site_mode,
+                                               FAST_DOUBLE_ELEMENTS,
+                                               BailoutId::StubEntry(),
+                                               length));
+  } else {
+    ElementsKind elements_kind = casted_stub()->ComputeElementsKind();
+    environment()->Push(BuildCloneShallowArray(context(),
+                                               boilerplate,
+                                               alloc_site_mode,
+                                               elements_kind,
+                                               BailoutId::StubEntry(),
+                                               length));
+  }
+
+  return environment()->Pop();
+}
+
+
+Handle<Code> FastCloneShallowArrayStub::GenerateCode() {
+  CodeStubGraphBuilder<FastCloneShallowArrayStub> builder(this);
+  LChunk* chunk = OptimizeGraph(builder.CreateGraph());
+  return chunk->Codegen(Code::COMPILED_STUB);
+}
+
+
+template <>
 HValue* CodeStubGraphBuilder<FastCloneShallowObjectStub>::BuildCodeStub() {
   Zone* zone = this->zone();
   Factory* factory = isolate()->factory();
 
   HInstruction* boilerplate =
       AddInstruction(new(zone) HLoadKeyed(GetParameter(0),
                                           GetParameter(1),
                                           NULL,
                                           FAST_ELEMENTS));
 
@@ skipping 196 matching lines @@
 }
 
 
 Handle<Code> ArrayNArgumentsConstructorStub::GenerateCode() {
   CodeStubGraphBuilder<ArrayNArgumentsConstructorStub> builder(this);
   LChunk* chunk = OptimizeGraph(builder.CreateGraph());
   return chunk->Codegen(Code::COMPILED_STUB);
 }
 
 } }  // namespace v8::internal