Update mips infrastructure files.

src/mips/codegen-mips.h

-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 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
 //       with the distribution.
@@ skipping 32 matching lines @@
 #elif(defined(__mips_soft_float) && __mips_soft_float != 0)
 // Not using floating-point coprocessor instructions. This flag is raised when
 // -msoft-float is passed to the compiler.
 static const bool IsMipsSoftFloatABI = true;
 #else
 static const bool IsMipsSoftFloatABI = true;
 #endif
 
 // Forward declarations
 class CompilationInfo;
-class DeferredCode;
-class JumpTarget;
-class RegisterAllocator;
-class RegisterFile;
 
-enum InitState { CONST_INIT, NOT_CONST_INIT };
 enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
-enum GenerateInlineSmi { DONT_GENERATE_INLINE_SMI, GENERATE_INLINE_SMI };
-enum WriteBarrierCharacter { UNLIKELY_SMI, LIKELY_SMI, NEVER_NEWSPACE };
-
-
-// -----------------------------------------------------------------------------
-// Reference support
-
-// A reference is a C++ stack-allocated object that keeps an ECMA
-// reference on the execution stack while in scope. For variables
-// the reference is empty, indicating that it isn't necessary to
-// store state on the stack for keeping track of references to those.
-// For properties, we keep either one (named) or two (indexed) values
-// on the execution stack to represent the reference.
-class Reference BASE_EMBEDDED {
- public:
-  // The values of the types is important, see size().
-  enum Type { UNLOADED = -2, ILLEGAL = -1, SLOT = 0, NAMED = 1, KEYED = 2 };
-  Reference(CodeGenerator* cgen,
-            Expression* expression,
-            bool persist_after_get = false);
-  ~Reference();
-
-  Expression* expression() const { return expression_; }
-  Type type() const { return type_; }
-  void set_type(Type value) {
-    ASSERT_EQ(ILLEGAL, type_);
-    type_ = value;
-  }
-
-  void set_unloaded() {
-    ASSERT_NE(ILLEGAL, type_);
-    ASSERT_NE(UNLOADED, type_);
-    type_ = UNLOADED;
-  }
-  // The size the reference takes up on the stack.
-  int size() const {
-    return (type_ < SLOT) ? 0 : type_;
-  }
-
-  bool is_illegal() const { return type_ == ILLEGAL; }
-  bool is_slot() const { return type_ == SLOT; }
-  bool is_property() const { return type_ == NAMED || type_ == KEYED; }
-  bool is_unloaded() const { return type_ == UNLOADED; }
-
-  // Return the name. Only valid for named property references.
-  Handle<String> GetName();
-
-  // Generate code to push the value of the reference on top of the
-  // expression stack.  The reference is expected to be already on top of
-  // the expression stack, and it is consumed by the call unless the
-  // reference is for a compound assignment.
-  // If the reference is not consumed, it is left in place under its value.
-  void GetValue();
-
-  // Generate code to pop a reference, push the value of the reference,
-  // and then spill the stack frame.
-  inline void GetValueAndSpill();
-
-  // Generate code to store the value on top of the expression stack in the
-  // reference.  The reference is expected to be immediately below the value
-  // on the expression stack.  The  value is stored in the location specified
-  // by the reference, and is left on top of the stack, after the reference
-  // is popped from beneath it (unloaded).
-  void SetValue(InitState init_state, WriteBarrierCharacter wb);
-
-  // This is in preparation for something that uses the reference on the stack.
-  // If we need this reference afterwards get then dup it now.  Otherwise mark
-  // it as used.
-  inline void DupIfPersist();
-
- private:
-  CodeGenerator* cgen_;
-  Expression* expression_;
-  Type type_;
-  // Keep the reference on the stack after get, so it can be used by set later.
-  bool persist_after_get_;
-};
-
-
-// -----------------------------------------------------------------------------
-// Code generation state
-
-// The state is passed down the AST by the code generator (and back up, in
-// the form of the state of the label pair).  It is threaded through the
-// call stack.  Constructing a state implicitly pushes it on the owning code
-// generator's stack of states, and destroying one implicitly pops it.
-
-class CodeGenState BASE_EMBEDDED {
- public:
-  // Create an initial code generator state.  Destroying the initial state
-  // leaves the code generator with a NULL state.
-  explicit CodeGenState(CodeGenerator* owner);
-
-
-
-  // Destroy a code generator state and restore the owning code generator's
-  // previous state.
-  virtual ~CodeGenState();
-
-  virtual JumpTarget* true_target() const { return NULL; }
-  virtual JumpTarget* false_target() const { return NULL; }
-
- protected:
-  inline CodeGenerator* owner() { return owner_; }
-  inline CodeGenState* previous() const { return previous_; }
-
- private:
-  // The owning code generator.
-  CodeGenerator* owner_;
-
-
-
-  // The previous state of the owning code generator, restored when
-  // this state is destroyed.
-  CodeGenState* previous_;
-};
-
-
-class ConditionCodeGenState : public CodeGenState {
- public:
-  // Create a code generator state based on a code generator's current
-  // state.  The new state has its own pair of branch labels.
-  ConditionCodeGenState(CodeGenerator* owner,
-                        JumpTarget* true_target,
-                        JumpTarget* false_target);
-
-  virtual JumpTarget* true_target() const { return true_target_; }
-  virtual JumpTarget* false_target() const { return false_target_; }
-
- private:
-  JumpTarget* true_target_;
-  JumpTarget* false_target_;
-};
-
-
-class TypeInfoCodeGenState : public CodeGenState {
- public:
-  TypeInfoCodeGenState(CodeGenerator* owner,
-                       Slot* slot_number,
-                       TypeInfo info);
-  virtual ~TypeInfoCodeGenState();
-
-  virtual JumpTarget* true_target() const { return previous()->true_target(); }
-  virtual JumpTarget* false_target() const {
-    return previous()->false_target();
-  }
-
- private:
-  Slot* slot_;
-  TypeInfo old_type_info_;
-};
-
 
 // -------------------------------------------------------------------------
-// Arguments allocation mode
-
-enum ArgumentsAllocationMode {
-  NO_ARGUMENTS_ALLOCATION,
-  EAGER_ARGUMENTS_ALLOCATION,
-  LAZY_ARGUMENTS_ALLOCATION
-};
-
-
-// -----------------------------------------------------------------------------
 // CodeGenerator
 
 class CodeGenerator: public AstVisitor {
  public:
-  // Compilation mode.  Either the compiler is used as the primary
-  // compiler and needs to setup everything or the compiler is used as
-  // the secondary compiler for split compilation and has to handle
-  // bailouts.
-  enum Mode {
-    PRIMARY,
-    SECONDARY
-  };
-
   static bool MakeCode(CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
   static void MakeCodePrologue(CompilationInfo* info);
 
   // Allocate and install the code.
   static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm,
                                        Code::Flags flags,
                                        CompilationInfo* info);
 
   // Print the code after compiling it.
   static void PrintCode(Handle<Code> code, CompilationInfo* info);
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
 #endif
 
   static void SetFunctionInfo(Handle<JSFunction> fun,
                               FunctionLiteral* lit,
                               bool is_toplevel,
                               Handle<Script> script);
 
   static bool RecordPositions(MacroAssembler* masm,
                               int pos,
                               bool right_here = false);
 
-  // Accessors
-  MacroAssembler* masm() { return masm_; }
-  VirtualFrame* frame() const { return frame_; }
-  inline Handle<Script> script();
-
-  bool has_valid_frame() const { return frame_ != NULL; }
-
-  // Set the virtual frame to be new_frame, with non-frame register
-  // reference counts given by non_frame_registers.  The non-frame
-  // register reference counts of the old frame are returned in
-  // non_frame_registers.
-  void SetFrame(VirtualFrame* new_frame, RegisterFile* non_frame_registers);
-
-  void DeleteFrame();
-
-  RegisterAllocator* allocator() const { return allocator_; }
-
-  CodeGenState* state() { return state_; }
-  void set_state(CodeGenState* state) { state_ = state; }
-
-  TypeInfo type_info(Slot* slot) {
-    int index = NumberOfSlot(slot);
-    if (index == kInvalidSlotNumber) return TypeInfo::Unknown();
-    return (*type_info_)[index];
-  }
-
-  TypeInfo set_type_info(Slot* slot, TypeInfo info) {
-    int index = NumberOfSlot(slot);
-    ASSERT(index >= kInvalidSlotNumber);
-    if (index != kInvalidSlotNumber) {
-      TypeInfo previous_value = (*type_info_)[index];
-      (*type_info_)[index] = info;
-      return previous_value;
-    }
-    return TypeInfo::Unknown();
-  }
-  void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
-
   // Constants related to patching of inlined load/store.
   static int GetInlinedKeyedLoadInstructionsAfterPatch() {
     // This is in correlation with the padding in MacroAssembler::Abort.
     return FLAG_debug_code ? 45 : 20;
   }
-  static const int kInlinedKeyedStoreInstructionsAfterPatch = 9;
+
+  static const int kInlinedKeyedStoreInstructionsAfterPatch = 13;
+
   static int GetInlinedNamedStoreInstructionsAfterPatch() {
     ASSERT(Isolate::Current()->inlined_write_barrier_size() != -1);
     // Magic number 5: instruction count after patched map load:
     //  li: 2 (liu & ori), Branch : 2 (bne & nop), sw : 1
     return Isolate::Current()->inlined_write_barrier_size() + 5;
   }
 
  private:
-  // Type of a member function that generates inline code for a native function.
-  typedef void (CodeGenerator::*InlineFunctionGenerator)
-      (ZoneList<Expression*>*);
-
-  static const InlineFunctionGenerator kInlineFunctionGenerators[];
-
-
-  // Construction/Destruction.
-  explicit CodeGenerator(MacroAssembler* masm);
-
-  // Accessors.
-  inline bool is_eval();
-  inline Scope* scope();
-  inline bool is_strict_mode();
-  inline StrictModeFlag strict_mode_flag();
-
-  // Generating deferred code.
-  void ProcessDeferred();
-
-  static const int kInvalidSlotNumber = -1;
-
-  int NumberOfSlot(Slot* slot);
-  // State
-  bool has_cc() const { return cc_reg_ != cc_always; }
-
-  JumpTarget* true_target() const { return state_->true_target(); }
-  JumpTarget* false_target() const { return state_->false_target(); }
-
-  // Track loop nesting level.
-  int loop_nesting() const { return loop_nesting_; }
-  void IncrementLoopNesting() { loop_nesting_++; }
-  void DecrementLoopNesting() { loop_nesting_--; }
-
-  // Node visitors.
-  void VisitStatements(ZoneList<Statement*>* statements);
-
-  virtual void VisitSlot(Slot* node);
-#define DEF_VISIT(type) \
-  virtual void Visit##type(type* node);
-  AST_NODE_LIST(DEF_VISIT)
-#undef DEF_VISIT
-
-  // Main code generation function
-  void Generate(CompilationInfo* info);
-
-  // Generate the return sequence code.  Should be called no more than
-  // once per compiled function, immediately after binding the return
-  // target (which can not be done more than once).  The return value should
-  // be in v0.
-  void GenerateReturnSequence();
-
-  // Returns the arguments allocation mode.
-  ArgumentsAllocationMode ArgumentsMode();
-
-  // Store the arguments object and allocate it if necessary.
-  void StoreArgumentsObject(bool initial);
-
-  // The following are used by class Reference.
-  void LoadReference(Reference* ref);
-  void UnloadReference(Reference* ref);
-
-  MemOperand SlotOperand(Slot* slot, Register tmp);
-
-  MemOperand ContextSlotOperandCheckExtensions(Slot* slot,
-                                               Register tmp,
-                                               Register tmp2,
-                                               JumpTarget* slow);
-
-  void LoadCondition(Expression* x,
-                     JumpTarget* true_target,
-                     JumpTarget* false_target,
-                     bool force_cc);
-  void Load(Expression* x);
-  void LoadGlobal();
-  void LoadGlobalReceiver(Register scratch);
-
-
-  // Special code for typeof expressions: Unfortunately, we must
-  // be careful when loading the expression in 'typeof'
-  // expressions. We are not allowed to throw reference errors for
-  // non-existing properties of the global object, so we must make it
-  // look like an explicit property access, instead of an access
-  // through the context chain.
-  void LoadTypeofExpression(Expression* x);
-
-  // Store a keyed property. Key and receiver are on the stack and the value is
-  // in a0. Result is returned in r0.
-  void EmitKeyedStore(StaticType* key_type, WriteBarrierCharacter wb_info);
-
-  // Read a value from a slot and leave it on top of the expression stack.
-  void LoadFromSlot(Slot* slot, TypeofState typeof_state);
-  void LoadFromGlobalSlotCheckExtensions(Slot* slot,
-                                         TypeofState typeof_state,
-                                         JumpTarget* slow);
-  void LoadFromSlotCheckForArguments(Slot* slot, TypeofState state);
-
-  // Support for loading from local/global variables and arguments
-  // whose location is known unless they are shadowed by
-  // eval-introduced bindings. Generates no code for unsupported slot
-  // types and therefore expects to fall through to the slow jump target.
-  void EmitDynamicLoadFromSlotFastCase(Slot* slot,
-                                       TypeofState typeof_state,
-                                       JumpTarget* slow,
-                                       JumpTarget* done);
-
-  // Store the value on top of the stack to a slot.
-  void StoreToSlot(Slot* slot, InitState init_state);
-
-  // Support for compiling assignment expressions.
-  void EmitSlotAssignment(Assignment* node);
-  void EmitNamedPropertyAssignment(Assignment* node);
-  void EmitKeyedPropertyAssignment(Assignment* node);
-
-  // Load a named property, returning it in v0. The receiver is passed on the
-  // stack, and remains there.
-  void EmitNamedLoad(Handle<String> name, bool is_contextual);
-
-  // Store to a named property. If the store is contextual, value is passed on
-  // the frame and consumed. Otherwise, receiver and value are passed on the
-  // frame and consumed. The result is returned in v0.
-  void EmitNamedStore(Handle<String> name, bool is_contextual);
-
-  // Load a keyed property, leaving it in v0. The receiver and key are
-  // passed on the stack, and remain there.
-  void EmitKeyedLoad();
-
-  void ToBoolean(JumpTarget* true_target, JumpTarget* false_target);
-
-  // Generate code that computes a shortcutting logical operation.
-  void GenerateLogicalBooleanOperation(BinaryOperation* node);
-
-  void GenericBinaryOperation(Token::Value op,
-                              OverwriteMode overwrite_mode,
-                              GenerateInlineSmi inline_smi,
-                              int known_rhs =
-                                GenericBinaryOpStub::kUnknownIntValue);
-
-  void VirtualFrameBinaryOperation(Token::Value op,
-                                   OverwriteMode overwrite_mode,
-                                   int known_rhs =
-                                      GenericBinaryOpStub::kUnknownIntValue);
-
-  void SmiOperation(Token::Value op,
-                    Handle<Object> value,
-                    bool reversed,
-                    OverwriteMode mode);
-
-  void Comparison(Condition cc,
-                  Expression* left,
-                  Expression* right,
-                  bool strict = false);
-
-  void CallWithArguments(ZoneList<Expression*>* arguments,
-                         CallFunctionFlags flags,
-                         int position);
-
-  // An optimized implementation of expressions of the form
-  // x.apply(y, arguments).  We call x the applicand and y the receiver.
-  // The optimization avoids allocating an arguments object if possible.
-  void CallApplyLazy(Expression* applicand,
-                     Expression* receiver,
-                     VariableProxy* arguments,
-                     int position);
-
-  // Control flow
-  void Branch(bool if_true, JumpTarget* target);
-  void CheckStack();
-
-  bool CheckForInlineRuntimeCall(CallRuntime* node);
-
-  static Handle<Code> ComputeLazyCompile(int argc);
-  void ProcessDeclarations(ZoneList<Declaration*>* declarations);
-
-  // Declare global variables and functions in the given array of
-  // name/value pairs.
-  void DeclareGlobals(Handle<FixedArray> pairs);
-
-  // Instantiate the function based on the shared function info.
-  void InstantiateFunction(Handle<SharedFunctionInfo> function_info,
-                           bool pretenure);
-
-  // Support for type checks.
-  void GenerateIsSmi(ZoneList<Expression*>* args);
-  void GenerateIsNonNegativeSmi(ZoneList<Expression*>* args);
-  void GenerateIsArray(ZoneList<Expression*>* args);
-  void GenerateIsRegExp(ZoneList<Expression*>* args);
-
-  // Support for construct call checks.
-  void GenerateIsConstructCall(ZoneList<Expression*>* args);
-
-  // Support for arguments.length and arguments[?].
-  void GenerateArgumentsLength(ZoneList<Expression*>* args);
-  void GenerateArguments(ZoneList<Expression*>* args);
-
-  // Support for accessing the class and value fields of an object.
-  void GenerateClassOf(ZoneList<Expression*>* args);
-  void GenerateValueOf(ZoneList<Expression*>* args);
-  void GenerateSetValueOf(ZoneList<Expression*>* args);
-
-  // Fast support for charCodeAt(n).
-  void GenerateStringCharCodeAt(ZoneList<Expression*>* args);
-
-  // Fast support for string.charAt(n) and string[n].
-  void GenerateStringCharFromCode(ZoneList<Expression*>* args);
-
-  // Fast support for string.charAt(n) and string[n].
-  void GenerateStringCharAt(ZoneList<Expression*>* args);
-
-  // Fast support for object equality testing.
-  void GenerateObjectEquals(ZoneList<Expression*>* args);
-
-  void GenerateLog(ZoneList<Expression*>* args);
-
-  // Fast support for Math.random().
-  void GenerateRandomHeapNumber(ZoneList<Expression*>* args);
-
-  void GenerateIsObject(ZoneList<Expression*>* args);
-  void GenerateIsSpecObject(ZoneList<Expression*>* args);
-  void GenerateIsFunction(ZoneList<Expression*>* args);
-  void GenerateIsUndetectableObject(ZoneList<Expression*>* args);
-  void GenerateStringAdd(ZoneList<Expression*>* args);
-  void GenerateSubString(ZoneList<Expression*>* args);
-  void GenerateStringCompare(ZoneList<Expression*>* args);
-  void GenerateIsStringWrapperSafeForDefaultValueOf(
-      ZoneList<Expression*>* args);
-
-  // Support for direct calls from JavaScript to native RegExp code.
-  void GenerateRegExpExec(ZoneList<Expression*>* args);
-
-  void GenerateRegExpConstructResult(ZoneList<Expression*>* args);
-
-  // Support for fast native caches.
-  void GenerateGetFromCache(ZoneList<Expression*>* args);
-
-  // Fast support for number to string.
-  void GenerateNumberToString(ZoneList<Expression*>* args);
-
-  // Fast swapping of elements.
-  void GenerateSwapElements(ZoneList<Expression*>* args);
-
-  // Fast call for custom callbacks.
-  void GenerateCallFunction(ZoneList<Expression*>* args);
-
-  // Fast call to math functions.
-  void GenerateMathPow(ZoneList<Expression*>* args);
-  void GenerateMathSin(ZoneList<Expression*>* args);
-  void GenerateMathCos(ZoneList<Expression*>* args);
-  void GenerateMathSqrt(ZoneList<Expression*>* args);
-  void GenerateMathLog(ZoneList<Expression*>* args);
-
-  void GenerateIsRegExpEquivalent(ZoneList<Expression*>* args);
-
-  void GenerateHasCachedArrayIndex(ZoneList<Expression*>* args);
-  void GenerateGetCachedArrayIndex(ZoneList<Expression*>* args);
-  void GenerateFastAsciiArrayJoin(ZoneList<Expression*>* args);
-
-  // Simple condition analysis.
-  enum ConditionAnalysis {
-    ALWAYS_TRUE,
-    ALWAYS_FALSE,
-    DONT_KNOW
-  };
-  ConditionAnalysis AnalyzeCondition(Expression* cond);
-
-  // Methods used to indicate which source code is generated for. Source
-  // positions are collected by the assembler and emitted with the relocation
-  // information.
-  void CodeForFunctionPosition(FunctionLiteral* fun);
-  void CodeForReturnPosition(FunctionLiteral* fun);
-  void CodeForStatementPosition(Statement* node);
-  void CodeForDoWhileConditionPosition(DoWhileStatement* stmt);
-  void CodeForSourcePosition(int pos);
-
-#ifdef DEBUG
-  // True if the registers are valid for entry to a block.
-  bool HasValidEntryRegisters();
-#endif
-
-  List<DeferredCode*> deferred_;
-
-  // Assembler
-  MacroAssembler* masm_;  // to generate code
-
-  CompilationInfo* info_;
-
-  // Code generation state
-  VirtualFrame* frame_;
-  RegisterAllocator* allocator_;
-  Condition cc_reg_;
-  CodeGenState* state_;
-  int loop_nesting_;
-
-  Vector<TypeInfo>* type_info_;
-  // Jump targets
-  BreakTarget function_return_;
-
-  // True if the function return is shadowed (ie, jumping to the target
-  // function_return_ does not jump to the true function return, but rather
-  // to some unlinking code).
-  bool function_return_is_shadowed_;
-
-  friend class VirtualFrame;
-  friend class Isolate;
-  friend class JumpTarget;
-  friend class Reference;
-  friend class FastCodeGenerator;
-  friend class FullCodeGenerator;
-  friend class FullCodeGenSyntaxChecker;
-  friend class InlineRuntimeFunctionsTable;
-  friend class LCodeGen;
-
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_CODEGEN_MIPS_H_