Revert 13105: "Enable stub generation using Hydrogen/Lithium."

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 6188f3484d505676371b9f1ed7ee5fc1a877b5be..ae113f5729a58d26bcdfeffff0ee5011a2570954 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -162,29 +162,20 @@ class CodeStub BASE_EMBEDDED {
   // Lookup the code in the (possibly custom) cache.
   bool FindCodeInCache(Code** code_out, Isolate* isolate);
 
-  // Returns information for computing the number key.
-  virtual Major MajorKey() = 0;
-  virtual int MinorKey() = 0;
-
  protected:
   static bool CanUseFPRegisters();
 
-  // Generates the assembler code for the stub.
-  virtual Handle<Code> GenerateCode() = 0;
-
-  // BinaryOpStub needs to override this.
-  virtual InlineCacheState GetICState() {
-    return UNINITIALIZED;
-  }
+ private:
+  // Nonvirtual wrapper around the stub-specific Generate function.  Call
+  // this function to set up the macro assembler and generate the code.
+  void GenerateCode(MacroAssembler* masm);
 
-  // Returns whether the code generated for this stub needs to be allocated as
-  // a fixed (non-moveable) code object.
-  virtual bool NeedsImmovableCode() { return false; }
+  // Generates the assembler code for the stub.
+  virtual void Generate(MacroAssembler* masm) = 0;
 
- private:
   // Perform bookkeeping required after code generation when stub code is
   // initially generated.
-  void RecordCodeGeneration(Code* code, Isolate* isolate);
+  void RecordCodeGeneration(Code* code, MacroAssembler* masm);
 
   // Finish the code object after it has been generated.
   virtual void FinishCode(Handle<Code> code) { }
@@ -193,9 +184,18 @@ class CodeStub BASE_EMBEDDED {
   // registering stub in the stub cache.
   virtual void Activate(Code* code) { }
 
+  // Returns information for computing the number key.
+  virtual Major MajorKey() = 0;
+  virtual int MinorKey() = 0;
+
   // BinaryOpStub needs to override this.
   virtual int GetCodeKind();
 
+  // BinaryOpStub needs to override this.
+  virtual InlineCacheState GetICState() {
+    return UNINITIALIZED;
+  }
+
   // Add the code to a specialized cache, specific to an individual
   // stub type. Please note, this method must add the code object to a
   // roots object, otherwise we will remove the code during GC.
@@ -213,6 +213,10 @@ class CodeStub BASE_EMBEDDED {
   SmartArrayPointer<const char> GetName();
   virtual void PrintName(StringStream* stream);
 
+  // Returns whether the code generated for this stub needs to be allocated as
+  // a fixed (non-moveable) code object.
+  virtual bool NeedsImmovableCode() { return false; }
+
   // Computes the key based on major and minor.
   uint32_t GetKey() {
     ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
@@ -228,43 +232,6 @@ class CodeStub BASE_EMBEDDED {
 };
 
 
-class PlatformCodeStub : public CodeStub {
- public:
-  // Retrieve the code for the stub. Generate the code if needed.
-  virtual Handle<Code> GenerateCode();
-
-  virtual int GetCodeKind() { return Code::STUB; }
-
- protected:
-  // Generates the assembler code for the stub.
-  virtual void Generate(MacroAssembler* masm) = 0;
-};
-
-
-struct CodeStubInterfaceDescriptor {
-  int number_of_register_params;
-  Register* register_params;
-  Handle<Code> deoptimization_handler;
-};
-
-
-class HGraph;
-class Register;
-class HydrogenCodeStub : public CodeStub {
- public:
-  // Retrieve the code for the stub. Generate the code if needed.
-  virtual Handle<Code> GenerateCode() = 0;
-
-  virtual int GetCodeKind() { return Code::COMPILED_STUB; }
-
-  virtual CodeStubInterfaceDescriptor* GetInterfaceDescriptor(
-      Isolate* isolate) = 0;
-
- protected:
-  Handle<Code> CodeFromGraph(HGraph* graph);
-};
-
-
 // Helper interface to prepare to/restore after making runtime calls.
 class RuntimeCallHelper {
  public:
@@ -322,7 +289,7 @@ class NopRuntimeCallHelper : public RuntimeCallHelper {
 };
 
 
-class StackCheckStub : public PlatformCodeStub {
+class StackCheckStub : public CodeStub {
  public:
   StackCheckStub() { }
 
@@ -334,7 +301,7 @@ class StackCheckStub : public PlatformCodeStub {
 };
 
 
-class InterruptStub : public PlatformCodeStub {
+class InterruptStub : public CodeStub {
  public:
   InterruptStub() { }
 
@@ -346,7 +313,7 @@ class InterruptStub : public PlatformCodeStub {
 };
 
 
-class ToNumberStub: public PlatformCodeStub {
+class ToNumberStub: public CodeStub {
  public:
   ToNumberStub() { }
 
@@ -358,7 +325,7 @@ class ToNumberStub: public PlatformCodeStub {
 };
 
 
-class FastNewClosureStub : public PlatformCodeStub {
+class FastNewClosureStub : public CodeStub {
  public:
   explicit FastNewClosureStub(LanguageMode language_mode)
     : language_mode_(language_mode) { }
@@ -374,7 +341,7 @@ class FastNewClosureStub : public PlatformCodeStub {
 };
 
 
-class FastNewContextStub : public PlatformCodeStub {
+class FastNewContextStub : public CodeStub {
  public:
   static const int kMaximumSlots = 64;
 
@@ -392,7 +359,7 @@ class FastNewContextStub : public PlatformCodeStub {
 };
 
 
-class FastNewBlockContextStub : public PlatformCodeStub {
+class FastNewBlockContextStub : public CodeStub {
  public:
   static const int kMaximumSlots = 64;
 
@@ -410,7 +377,7 @@ class FastNewBlockContextStub : public PlatformCodeStub {
 };
 
 
-class FastCloneShallowArrayStub : public PlatformCodeStub {
+class FastCloneShallowArrayStub : public CodeStub {
  public:
   // Maximum length of copied elements array.
   static const int kMaximumClonedLength = 8;
@@ -443,7 +410,7 @@ class FastCloneShallowArrayStub : public PlatformCodeStub {
 };
 
 
-class FastCloneShallowObjectStub : public PlatformCodeStub {
+class FastCloneShallowObjectStub : public CodeStub {
  public:
   // Maximum number of properties in copied object.
   static const int kMaximumClonedProperties = 6;
@@ -463,7 +430,7 @@ class FastCloneShallowObjectStub : public PlatformCodeStub {
 };
 
 
-class InstanceofStub: public PlatformCodeStub {
+class InstanceofStub: public CodeStub {
  public:
   enum Flags {
     kNoFlags = 0,
@@ -501,7 +468,7 @@ class InstanceofStub: public PlatformCodeStub {
 };
 
 
-class MathPowStub: public PlatformCodeStub {
+class MathPowStub: public CodeStub {
  public:
   enum ExponentType { INTEGER, DOUBLE, TAGGED, ON_STACK};
 
@@ -517,7 +484,7 @@ class MathPowStub: public PlatformCodeStub {
 };
 
 
-class BinaryOpStub: public PlatformCodeStub {
+class BinaryOpStub: public CodeStub {
  public:
   BinaryOpStub(Token::Value op, OverwriteMode mode)
       : op_(op),
@@ -633,7 +600,7 @@ class BinaryOpStub: public PlatformCodeStub {
 };
 
 
-class ICCompareStub: public PlatformCodeStub {
+class ICCompareStub: public CodeStub {
  public:
   ICCompareStub(Token::Value op,
                 CompareIC::State left,
@@ -699,7 +666,7 @@ class ICCompareStub: public PlatformCodeStub {
 };
 
 
-class CEntryStub : public PlatformCodeStub {
+class CEntryStub : public CodeStub {
  public:
   explicit CEntryStub(int result_size,
                       SaveFPRegsMode save_doubles = kDontSaveFPRegs)
@@ -733,7 +700,7 @@ class CEntryStub : public PlatformCodeStub {
 };
 
 
-class JSEntryStub : public PlatformCodeStub {
+class JSEntryStub : public CodeStub {
  public:
   JSEntryStub() { }
 
@@ -767,7 +734,7 @@ class JSConstructEntryStub : public JSEntryStub {
 };
 
 
-class ArgumentsAccessStub: public PlatformCodeStub {
+class ArgumentsAccessStub: public CodeStub {
  public:
   enum Type {
     READ_ELEMENT,
@@ -794,7 +761,7 @@ class ArgumentsAccessStub: public PlatformCodeStub {
 };
 
 
-class RegExpExecStub: public PlatformCodeStub {
+class RegExpExecStub: public CodeStub {
  public:
   RegExpExecStub() { }
 
@@ -806,7 +773,7 @@ class RegExpExecStub: public PlatformCodeStub {
 };
 
 
-class RegExpConstructResultStub: public PlatformCodeStub {
+class RegExpConstructResultStub: public CodeStub {
  public:
   RegExpConstructResultStub() { }
 
@@ -818,7 +785,7 @@ class RegExpConstructResultStub: public PlatformCodeStub {
 };
 
 
-class CallFunctionStub: public PlatformCodeStub {
+class CallFunctionStub: public CodeStub {
  public:
   CallFunctionStub(int argc, CallFunctionFlags flags)
       : argc_(argc), flags_(flags) { }
@@ -859,7 +826,7 @@ class CallFunctionStub: public PlatformCodeStub {
 };
 
 
-class CallConstructStub: public PlatformCodeStub {
+class CallConstructStub: public CodeStub {
  public:
   explicit CallConstructStub(CallFunctionFlags flags) : flags_(flags) {}
 
@@ -1050,53 +1017,25 @@ class AllowStubCallsScope {
 };
 
 
-class KeyedLoadDictionaryElementStub : public PlatformCodeStub {
+class KeyedLoadElementStub : public CodeStub {
  public:
-  KeyedLoadDictionaryElementStub() {}
+  explicit KeyedLoadElementStub(ElementsKind elements_kind)
+      : elements_kind_(elements_kind)
+  { }
 
   Major MajorKey() { return KeyedLoadElement; }
-  int MinorKey() { return DICTIONARY_ELEMENTS; }
+  int MinorKey() { return elements_kind_; }
 
   void Generate(MacroAssembler* masm);
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(KeyedLoadDictionaryElementStub);
-};
-
-
-class KeyedLoadFastElementStub : public HydrogenCodeStub {
- public:
-  KeyedLoadFastElementStub(bool is_js_array, ElementsKind elements_kind) {
-    bit_field_ = ElementsKindBits::encode(elements_kind) |
-        IsJSArrayBits::encode(is_js_array);
-  }
-
-  Major MajorKey() { return KeyedLoadElement; }
-  int MinorKey() { return bit_field_; }
-
-  bool is_js_array() const {
-    return IsJSArrayBits::decode(bit_field_);
-  }
-
-  ElementsKind elements_kind() const {
-    return ElementsKindBits::decode(bit_field_);
-  }
-
-  virtual Handle<Code> GenerateCode();
-
-  virtual CodeStubInterfaceDescriptor* GetInterfaceDescriptor(
-      Isolate* isolate);
-
- private:
-  class IsJSArrayBits: public BitField<bool, 8, 1> {};
-  class ElementsKindBits: public BitField<ElementsKind, 0, 8> {};
-  uint32_t bit_field_;
+  ElementsKind elements_kind_;
 
-  DISALLOW_COPY_AND_ASSIGN(KeyedLoadFastElementStub);
+  DISALLOW_COPY_AND_ASSIGN(KeyedLoadElementStub);
 };
 
 
-class KeyedStoreElementStub : public PlatformCodeStub {
+class KeyedStoreElementStub : public CodeStub {
  public:
   KeyedStoreElementStub(bool is_js_array,
                         ElementsKind elements_kind,
@@ -1131,7 +1070,7 @@ class KeyedStoreElementStub : public PlatformCodeStub {
 };
 
 
-class ToBooleanStub: public PlatformCodeStub {
+class ToBooleanStub: public CodeStub {
  public:
   enum Type {
     UNDEFINED,
@@ -1201,7 +1140,7 @@ class ToBooleanStub: public PlatformCodeStub {
 };
 
 
-class ElementsTransitionAndStoreStub : public PlatformCodeStub {
+class ElementsTransitionAndStoreStub : public CodeStub {
  public:
   ElementsTransitionAndStoreStub(ElementsKind from,
                                  ElementsKind to,
@@ -1242,7 +1181,7 @@ class ElementsTransitionAndStoreStub : public PlatformCodeStub {
 };
 
 
-class StoreArrayLiteralElementStub : public PlatformCodeStub {
+class StoreArrayLiteralElementStub : public CodeStub {
  public:
   StoreArrayLiteralElementStub()
         : fp_registers_(CanUseFPRegisters()) { }
@@ -1261,7 +1200,7 @@ class StoreArrayLiteralElementStub : public PlatformCodeStub {
 };
 
 
-class ProfileEntryHookStub : public PlatformCodeStub {
+class ProfileEntryHookStub : public CodeStub {
  public:
   explicit ProfileEntryHookStub() {}