Remove dependence of code-stubs on codegen, the virtual frame code generator....

src/codegen.h

 // Copyright 2006-2008 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 55 matching lines @@
 //   CheckForInlineRuntimeCall
 //   PatchInlineRuntimeEntry
 //   AnalyzeCondition
 //   CodeForFunctionPosition
 //   CodeForReturnPosition
 //   CodeForStatementPosition
 //   CodeForDoWhileConditionPosition
 //   CodeForSourcePosition
 
 
-// Mode to overwrite BinaryExpression values.
-enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
-enum UnaryOverwriteMode { UNARY_OVERWRITE, UNARY_NO_OVERWRITE };
-
-// Types of uncatchable exceptions.
-enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
-
 #define INLINE_RUNTIME_FUNCTION_LIST(F) \
   F(IsSmi, 1, 1)                                                             \
   F(IsNonNegativeSmi, 1, 1)                                                  \
   F(IsArray, 1, 1)                                                           \
   F(IsRegExp, 1, 1)                                                          \
   F(CallFunction, -1 /* receiver + n args + function */, 1)                  \
   F(IsConstructCall, 0, 1)                                                   \
   F(ArgumentsLength, 0, 1)                                                   \
   F(Arguments, 1, 1)                                                         \
   F(ClassOf, 1, 1)                                                           \
@@ skipping 38 matching lines @@
 #include "mips/codegen-mips.h"
 #else
 #error Unsupported target architecture.
 #endif
 
 #include "register-allocator.h"
 
 namespace v8 {
 namespace internal {
 
-// Support for "structured" code comments.
-#ifdef DEBUG
-
-class Comment BASE_EMBEDDED {
- public:
-  Comment(MacroAssembler* masm, const char* msg);
-  ~Comment();
-
- private:
-  MacroAssembler* masm_;
-  const char* msg_;
-};
-
-#else
-
-class Comment BASE_EMBEDDED {
- public:
-  Comment(MacroAssembler*, const char*)  {}
-};
-
-#endif  // DEBUG
-
-
 // Code generation can be nested.  Code generation scopes form a stack
 // of active code generators.
 class CodeGeneratorScope BASE_EMBEDDED {
  public:
   explicit CodeGeneratorScope(CodeGenerator* cgen) {
     previous_ = top_;
     top_ = cgen;
   }
 
   ~CodeGeneratorScope() {
@@ skipping 52 matching lines @@
   VirtualFrame frame_;
 };
 
 #else
 
 #error Unsupported target architecture.
 
 #endif
 
 
-// Helper interface to prepare to/restore after making runtime calls.
-class RuntimeCallHelper {
- public:
-  virtual ~RuntimeCallHelper() {}
-
-  virtual void BeforeCall(MacroAssembler* masm) const = 0;
-
-  virtual void AfterCall(MacroAssembler* masm) const = 0;
-
- protected:
-  RuntimeCallHelper() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(RuntimeCallHelper);
-};
-
-
 // RuntimeCallHelper implementation that saves/restores state of a
 // virtual frame.
 class VirtualFrameRuntimeCallHelper : public RuntimeCallHelper {
  public:
   // Does not take ownership of |frame_state|.
   explicit VirtualFrameRuntimeCallHelper(const FrameRegisterState* frame_state)
       : frame_state_(frame_state) {}
 
   virtual void BeforeCall(MacroAssembler* masm) const;
 
   virtual void AfterCall(MacroAssembler* masm) const;
 
  private:
   const FrameRegisterState* frame_state_;
 };
 
 
-// RuntimeCallHelper implementation used in IC stubs: enters/leaves a
-// newly created internal frame before/after the runtime call.
-class ICRuntimeCallHelper : public RuntimeCallHelper {
- public:
-  ICRuntimeCallHelper() {}
-
-  virtual void BeforeCall(MacroAssembler* masm) const;
-
-  virtual void AfterCall(MacroAssembler* masm) const;
-};
-
-
-// Trivial RuntimeCallHelper implementation.
-class NopRuntimeCallHelper : public RuntimeCallHelper {
- public:
-  NopRuntimeCallHelper() {}
-
-  virtual void BeforeCall(MacroAssembler* masm) const {}
-
-  virtual void AfterCall(MacroAssembler* masm) const {}
-};
-
-
 // Deferred code objects are small pieces of code that are compiled
 // out of line. They are used to defer the compilation of uncommon
 // paths thereby avoiding expensive jumps around uncommon code parts.
 class DeferredCode: public ZoneObject {
  public:
   DeferredCode();
   virtual ~DeferredCode() { }
 
   virtual void Generate() = 0;
 
@@ skipping 42 matching lines @@
   Label exit_label_;
 
   FrameRegisterState frame_state_;
 
 #ifdef DEBUG
   const char* comment_;
 #endif
   DISALLOW_COPY_AND_ASSIGN(DeferredCode);
 };
 
-class StackCheckStub : public CodeStub {
- public:
-  StackCheckStub() { }
 
-  void Generate(MacroAssembler* masm);
-
- private:
-
-  const char* GetName() { return "StackCheckStub"; }
-
-  Major MajorKey() { return StackCheck; }
-  int MinorKey() { return 0; }
-};
-
-
-class FastNewClosureStub : public CodeStub {
- public:
-  void Generate(MacroAssembler* masm);
-
- private:
-  const char* GetName() { return "FastNewClosureStub"; }
-  Major MajorKey() { return FastNewClosure; }
-  int MinorKey() { return 0; }
-};
-
-
-class FastNewContextStub : public CodeStub {
- public:
-  static const int kMaximumSlots = 64;
-
-  explicit FastNewContextStub(int slots) : slots_(slots) {
-    ASSERT(slots_ > 0 && slots <= kMaximumSlots);
-  }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  int slots_;
-
-  const char* GetName() { return "FastNewContextStub"; }
-  Major MajorKey() { return FastNewContext; }
-  int MinorKey() { return slots_; }
-};
-
-
-class FastCloneShallowArrayStub : public CodeStub {
- public:
-  // Maximum length of copied elements array.
-  static const int kMaximumClonedLength = 8;
-
-  enum Mode {
-    CLONE_ELEMENTS,
-    COPY_ON_WRITE_ELEMENTS
-  };
-
-  FastCloneShallowArrayStub(Mode mode, int length)
-      : mode_(mode),
-        length_((mode == COPY_ON_WRITE_ELEMENTS) ? 0 : length) {
-    ASSERT(length_ >= 0);
-    ASSERT(length_ <= kMaximumClonedLength);
-  }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Mode mode_;
-  int length_;
-
-  const char* GetName() { return "FastCloneShallowArrayStub"; }
-  Major MajorKey() { return FastCloneShallowArray; }
-  int MinorKey() {
-    ASSERT(mode_ == 0 || mode_ == 1);
-    return (length_ << 1) | mode_;
-  }
-};
-
-
-class InstanceofStub: public CodeStub {
- public:
-  InstanceofStub() { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Major MajorKey() { return Instanceof; }
-  int MinorKey() { return 0; }
-};
-
-
-enum NegativeZeroHandling {
-  kStrictNegativeZero,
-  kIgnoreNegativeZero
-};
-
-
-class GenericUnaryOpStub : public CodeStub {
- public:
-  GenericUnaryOpStub(Token::Value op,
-                     UnaryOverwriteMode overwrite,
-                     NegativeZeroHandling negative_zero = kStrictNegativeZero)
-      : op_(op), overwrite_(overwrite), negative_zero_(negative_zero) { }
-
- private:
-  Token::Value op_;
-  UnaryOverwriteMode overwrite_;
-  NegativeZeroHandling negative_zero_;
-
-  class OverwriteField: public BitField<UnaryOverwriteMode, 0, 1> {};
-  class NegativeZeroField: public BitField<NegativeZeroHandling, 1, 1> {};
-  class OpField: public BitField<Token::Value, 2, kMinorBits - 2> {};
-
-  Major MajorKey() { return GenericUnaryOp; }
-  int MinorKey() {
-    return OpField::encode(op_) |
-           OverwriteField::encode(overwrite_) |
-           NegativeZeroField::encode(negative_zero_);
-  }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName();
-};
-
-
-enum NaNInformation {
-  kBothCouldBeNaN,
-  kCantBothBeNaN
-};
-
-
-class CompareStub: public CodeStub {
- public:
-  CompareStub(Condition cc,
-              bool strict,
-              NaNInformation nan_info = kBothCouldBeNaN,
-              bool include_number_compare = true,
-              Register lhs = no_reg,
-              Register rhs = no_reg) :
-      cc_(cc),
-      strict_(strict),
-      never_nan_nan_(nan_info == kCantBothBeNaN),
-      include_number_compare_(include_number_compare),
-      lhs_(lhs),
-      rhs_(rhs),
-      name_(NULL) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Condition cc_;
-  bool strict_;
-  // Only used for 'equal' comparisons.  Tells the stub that we already know
-  // that at least one side of the comparison is not NaN.  This allows the
-  // stub to use object identity in the positive case.  We ignore it when
-  // generating the minor key for other comparisons to avoid creating more
-  // stubs.
-  bool never_nan_nan_;
-  // Do generate the number comparison code in the stub. Stubs without number
-  // comparison code is used when the number comparison has been inlined, and
-  // the stub will be called if one of the operands is not a number.
-  bool include_number_compare_;
-  // Register holding the left hand side of the comparison if the stub gives
-  // a choice, no_reg otherwise.
-  Register lhs_;
-  // Register holding the right hand side of the comparison if the stub gives
-  // a choice, no_reg otherwise.
-  Register rhs_;
-
-  // Encoding of the minor key CCCCCCCCCCCCRCNS.
-  class StrictField: public BitField<bool, 0, 1> {};
-  class NeverNanNanField: public BitField<bool, 1, 1> {};
-  class IncludeNumberCompareField: public BitField<bool, 2, 1> {};
-  class RegisterField: public BitField<bool, 3, 1> {};
-  class ConditionField: public BitField<int, 4, 12> {};
-
-  Major MajorKey() { return Compare; }
-
-  int MinorKey();
-
-  // Branch to the label if the given object isn't a symbol.
-  void BranchIfNonSymbol(MacroAssembler* masm,
-                         Label* label,
-                         Register object,
-                         Register scratch);
-
-  // Unfortunately you have to run without snapshots to see most of these
-  // names in the profile since most compare stubs end up in the snapshot.
-  char* name_;
-  const char* GetName();
-#ifdef DEBUG
-  void Print() {
-    PrintF("CompareStub (cc %d), (strict %s), "
-           "(never_nan_nan %s), (number_compare %s) ",
-           static_cast<int>(cc_),
-           strict_ ? "true" : "false",
-           never_nan_nan_ ? "true" : "false",
-           include_number_compare_ ? "included" : "not included");
-
-    if (!lhs_.is(no_reg) && !rhs_.is(no_reg)) {
-      PrintF("(lhs r%d), (rhs r%d)\n", lhs_.code(), rhs_.code());
-    } else {
-      PrintF("\n");
-    }
-  }
-#endif
-};
-
-
-class CEntryStub : public CodeStub {
- public:
-  explicit CEntryStub(int result_size) : result_size_(result_size) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  void GenerateCore(MacroAssembler* masm,
-                    Label* throw_normal_exception,
-                    Label* throw_termination_exception,
-                    Label* throw_out_of_memory_exception,
-                    bool do_gc,
-                    bool always_allocate_scope,
-                    int alignment_skew = 0);
-  void GenerateThrowTOS(MacroAssembler* masm);
-  void GenerateThrowUncatchable(MacroAssembler* masm,
-                                UncatchableExceptionType type);
-
-  // Number of pointers/values returned.
-  const int result_size_;
-
-  // Minor key encoding
-  class IndirectResultBits: public BitField<bool, 1, 1> {};
-
-  Major MajorKey() { return CEntry; }
-  // Minor key must differ if different result_size_ values means different
-  // code is generated.
-  int MinorKey();
-
-  const char* GetName() { return "CEntryStub"; }
-};
-
-
-class ApiGetterEntryStub : public CodeStub {
- public:
-  ApiGetterEntryStub(Handle<AccessorInfo> info,
-                     ApiFunction* fun)
-      : info_(info),
-        fun_(fun) { }
-  void Generate(MacroAssembler* masm);
-  virtual bool has_custom_cache() { return true; }
-  virtual bool GetCustomCache(Code** code_out);
-  virtual void SetCustomCache(Code* value);
-
-  static const int kStackSpace = 5;
-  static const int kArgc = 4;
- private:
-  Handle<AccessorInfo> info() { return info_; }
-  ApiFunction* fun() { return fun_; }
-  Major MajorKey() { return NoCache; }
-  int MinorKey() { return 0; }
-  const char* GetName() { return "ApiEntryStub"; }
-  // The accessor info associated with the function.
-  Handle<AccessorInfo> info_;
-  // The function to be called.
-  ApiFunction* fun_;
-};
-
-
-class JSEntryStub : public CodeStub {
- public:
-  JSEntryStub() { }
-
-  void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
-
- protected:
-  void GenerateBody(MacroAssembler* masm, bool is_construct);
-
- private:
-  Major MajorKey() { return JSEntry; }
-  int MinorKey() { return 0; }
-
-  const char* GetName() { return "JSEntryStub"; }
-};
-
-
-class JSConstructEntryStub : public JSEntryStub {
- public:
-  JSConstructEntryStub() { }
-
-  void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
-
- private:
-  int MinorKey() { return 1; }
-
-  const char* GetName() { return "JSConstructEntryStub"; }
-};
-
-
-class ArgumentsAccessStub: public CodeStub {
- public:
-  enum Type {
-    READ_ELEMENT,
-    NEW_OBJECT
-  };
-
-  explicit ArgumentsAccessStub(Type type) : type_(type) { }
-
- private:
-  Type type_;
-
-  Major MajorKey() { return ArgumentsAccess; }
-  int MinorKey() { return type_; }
-
-  void Generate(MacroAssembler* masm);
-  void GenerateReadElement(MacroAssembler* masm);
-  void GenerateNewObject(MacroAssembler* masm);
-
-  const char* GetName() { return "ArgumentsAccessStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("ArgumentsAccessStub (type %d)\n", type_);
-  }
-#endif
-};
-
-
-class RegExpExecStub: public CodeStub {
- public:
-  RegExpExecStub() { }
-
- private:
-  Major MajorKey() { return RegExpExec; }
-  int MinorKey() { return 0; }
-
-  void Generate(MacroAssembler* masm);
-
-  const char* GetName() { return "RegExpExecStub"; }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RegExpExecStub\n");
-  }
-#endif
-};
-
-
-class CallFunctionStub: public CodeStub {
- public:
-  CallFunctionStub(int argc, InLoopFlag in_loop, CallFunctionFlags flags)
-      : argc_(argc), in_loop_(in_loop), flags_(flags) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  int argc_;
-  InLoopFlag in_loop_;
-  CallFunctionFlags flags_;
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("CallFunctionStub (args %d, in_loop %d, flags %d)\n",
-           argc_,
-           static_cast<int>(in_loop_),
-           static_cast<int>(flags_));
-  }
-#endif
-
-  // Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
-  class InLoopBits: public BitField<InLoopFlag, 0, 1> {};
-  class FlagBits: public BitField<CallFunctionFlags, 1, 1> {};
-  class ArgcBits: public BitField<int, 2, 32 - 2> {};
-
-  Major MajorKey() { return CallFunction; }
-  int MinorKey() {
-    // Encode the parameters in a unique 32 bit value.
-    return InLoopBits::encode(in_loop_)
-           | FlagBits::encode(flags_)
-           | ArgcBits::encode(argc_);
-  }
-
-  InLoopFlag InLoop() { return in_loop_; }
-  bool ReceiverMightBeValue() {
-    return (flags_ & RECEIVER_MIGHT_BE_VALUE) != 0;
-  }
-
- public:
-  static int ExtractArgcFromMinorKey(int minor_key) {
-    return ArgcBits::decode(minor_key);
-  }
-};
-
-
-enum StringIndexFlags {
-  // Accepts smis or heap numbers.
-  STRING_INDEX_IS_NUMBER,
-
-  // Accepts smis or heap numbers that are valid array indices
-  // (ECMA-262 15.4). Invalid indices are reported as being out of
-  // range.
-  STRING_INDEX_IS_ARRAY_INDEX
-};
-
-
-// Generates code implementing String.prototype.charCodeAt.
-//
-// Only supports the case when the receiver is a string and the index
-// is a number (smi or heap number) that is a valid index into the
-// string. Additional index constraints are specified by the
-// flags. Otherwise, bails out to the provided labels.
-//
-// Register usage: |object| may be changed to another string in a way
-// that doesn't affect charCodeAt/charAt semantics, |index| is
-// preserved, |scratch| and |result| are clobbered.
-class StringCharCodeAtGenerator {
- public:
-  StringCharCodeAtGenerator(Register object,
-                            Register index,
-                            Register scratch,
-                            Register result,
-                            Label* receiver_not_string,
-                            Label* index_not_number,
-                            Label* index_out_of_range,
-                            StringIndexFlags index_flags)
-      : object_(object),
-        index_(index),
-        scratch_(scratch),
-        result_(result),
-        receiver_not_string_(receiver_not_string),
-        index_not_number_(index_not_number),
-        index_out_of_range_(index_out_of_range),
-        index_flags_(index_flags) {
-    ASSERT(!scratch_.is(object_));
-    ASSERT(!scratch_.is(index_));
-    ASSERT(!scratch_.is(result_));
-    ASSERT(!result_.is(object_));
-    ASSERT(!result_.is(index_));
-  }
-
-  // Generates the fast case code. On the fallthrough path |result|
-  // register contains the result.
-  void GenerateFast(MacroAssembler* masm);
-
-  // Generates the slow case code. Must not be naturally
-  // reachable. Expected to be put after a ret instruction (e.g., in
-  // deferred code). Always jumps back to the fast case.
-  void GenerateSlow(MacroAssembler* masm,
-                    const RuntimeCallHelper& call_helper);
-
- private:
-  Register object_;
-  Register index_;
-  Register scratch_;
-  Register result_;
-
-  Label* receiver_not_string_;
-  Label* index_not_number_;
-  Label* index_out_of_range_;
-
-  StringIndexFlags index_flags_;
-
-  Label call_runtime_;
-  Label index_not_smi_;
-  Label got_smi_index_;
-  Label exit_;
-
-  DISALLOW_COPY_AND_ASSIGN(StringCharCodeAtGenerator);
-};
-
-
-// Generates code for creating a one-char string from a char code.
-class StringCharFromCodeGenerator {
- public:
-  StringCharFromCodeGenerator(Register code,
-                              Register result)
-      : code_(code),
-        result_(result) {
-    ASSERT(!code_.is(result_));
-  }
-
-  // Generates the fast case code. On the fallthrough path |result|
-  // register contains the result.
-  void GenerateFast(MacroAssembler* masm);
-
-  // Generates the slow case code. Must not be naturally
-  // reachable. Expected to be put after a ret instruction (e.g., in
-  // deferred code). Always jumps back to the fast case.
-  void GenerateSlow(MacroAssembler* masm,
-                    const RuntimeCallHelper& call_helper);
-
- private:
-  Register code_;
-  Register result_;
-
-  Label slow_case_;
-  Label exit_;
-
-  DISALLOW_COPY_AND_ASSIGN(StringCharFromCodeGenerator);
-};
-
-
-// Generates code implementing String.prototype.charAt.
-//
-// Only supports the case when the receiver is a string and the index
-// is a number (smi or heap number) that is a valid index into the
-// string. Additional index constraints are specified by the
-// flags. Otherwise, bails out to the provided labels.
-//
-// Register usage: |object| may be changed to another string in a way
-// that doesn't affect charCodeAt/charAt semantics, |index| is
-// preserved, |scratch1|, |scratch2|, and |result| are clobbered.
-class StringCharAtGenerator {
- public:
-  StringCharAtGenerator(Register object,
-                        Register index,
-                        Register scratch1,
-                        Register scratch2,
-                        Register result,
-                        Label* receiver_not_string,
-                        Label* index_not_number,
-                        Label* index_out_of_range,
-                        StringIndexFlags index_flags)
-      : char_code_at_generator_(object,
-                                index,
-                                scratch1,
-                                scratch2,
-                                receiver_not_string,
-                                index_not_number,
-                                index_out_of_range,
-                                index_flags),
-        char_from_code_generator_(scratch2, result) {}
-
-  // Generates the fast case code. On the fallthrough path |result|
-  // register contains the result.
-  void GenerateFast(MacroAssembler* masm);
-
-  // Generates the slow case code. Must not be naturally
-  // reachable. Expected to be put after a ret instruction (e.g., in
-  // deferred code). Always jumps back to the fast case.
-  void GenerateSlow(MacroAssembler* masm,
-                    const RuntimeCallHelper& call_helper);
-
- private:
-  StringCharCodeAtGenerator char_code_at_generator_;
-  StringCharFromCodeGenerator char_from_code_generator_;
-
-  DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
-};
-
-
-}  // namespace internal
-}  // namespace v8
+} }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_