Move backend specific files to separate directories.

src/codegen-ia32.h

Index: src/codegen-ia32.h
diff --git a/src/codegen-ia32.h b/src/codegen-ia32.h
deleted file mode 100644
index a39bc58821c3d0538ba205b0c522c125961b321f..0000000000000000000000000000000000000000
--- a/src/codegen-ia32.h
+++ /dev/null
@@ -1,618 +0,0 @@
-// 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
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_CODEGEN_IA32_H_
-#define V8_CODEGEN_IA32_H_
-
-namespace v8 { namespace internal {
-
-// Forward declarations
-class DeferredCode;
-class RegisterAllocator;
-class RegisterFile;
-
-enum InitState { CONST_INIT, NOT_CONST_INIT };
-enum TypeofState { INSIDE_TYPEOF, NOT_INSIDE_TYPEOF };
-
-
-// -------------------------------------------------------------------------
-// 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 { ILLEGAL = -1, SLOT = 0, NAMED = 1, KEYED = 2 };
-  Reference(CodeGenerator* cgen, Expression* expression);
-  ~Reference();
-
-  Expression* expression() const { return expression_; }
-  Type type() const { return type_; }
-  void set_type(Type value) {
-    ASSERT(type_ == ILLEGAL);
-    type_ = value;
-  }
-
-  // The size the reference takes up on the stack.
-  int size() const { return (type_ == ILLEGAL) ? 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; }
-
-  // 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 left in place with its value above it.
-  void GetValue(TypeofState typeof_state);
-
-  // Like GetValue except that the slot is expected to be written to before
-  // being read from again.  Thae value of the reference may be invalidated,
-  // causing subsequent attempts to read it to fail.
-  void TakeValue(TypeofState typeof_state);
-
-  // 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 stored value is left in place (with the
-  // reference intact below it) to support chained assignments.
-  void SetValue(InitState init_state);
-
- private:
-  CodeGenerator* cgen_;
-  Expression* expression_;
-  Type type_;
-};
-
-
-// -------------------------------------------------------------------------
-// Control destinations.
-
-// A control destination encapsulates a pair of jump targets and a
-// flag indicating which one is the preferred fall-through.  The
-// preferred fall-through must be unbound, the other may be already
-// bound (ie, a backward target).
-//
-// The true and false targets may be jumped to unconditionally or
-// control may split conditionally.  Unconditional jumping and
-// splitting should be emitted in tail position (as the last thing
-// when compiling an expression) because they can cause either label
-// to be bound or the non-fall through to be jumped to leaving an
-// invalid virtual frame.
-//
-// The labels in the control destination can be extracted and
-// manipulated normally without affecting the state of the
-// destination.
-
-class ControlDestination BASE_EMBEDDED {
- public:
-  ControlDestination(JumpTarget* true_target,
-                     JumpTarget* false_target,
-                     bool true_is_fall_through)
-      : true_target_(true_target),
-        false_target_(false_target),
-        true_is_fall_through_(true_is_fall_through),
-        is_used_(false) {
-    ASSERT(true_is_fall_through ? !true_target->is_bound()
-                                : !false_target->is_bound());
-  }
-
-  // Accessors for the jump targets.  Directly jumping or branching to
-  // or binding the targets will not update the destination's state.
-  JumpTarget* true_target() const { return true_target_; }
-  JumpTarget* false_target() const { return false_target_; }
-
-  // True if the the destination has been jumped to unconditionally or
-  // control has been split to both targets.  This predicate does not
-  // test whether the targets have been extracted and manipulated as
-  // raw jump targets.
-  bool is_used() const { return is_used_; }
-
-  // True if the destination is used and the true target (respectively
-  // false target) was the fall through.  If the target is backward,
-  // "fall through" included jumping unconditionally to it.
-  bool true_was_fall_through() const {
-    return is_used_ && true_is_fall_through_;
-  }
-
-  bool false_was_fall_through() const {
-    return is_used_ && !true_is_fall_through_;
-  }
-
-  // Emit a branch to one of the true or false targets, and bind the
-  // other target.  Because this binds the fall-through target, it
-  // should be emitted in tail position (as the last thing when
-  // compiling an expression).
-  void Split(Condition cc) {
-    ASSERT(!is_used_);
-    if (true_is_fall_through_) {
-      false_target_->Branch(NegateCondition(cc));
-      true_target_->Bind();
-    } else {
-      true_target_->Branch(cc);
-      false_target_->Bind();
-    }
-    is_used_ = true;
-  }
-
-  // Emit an unconditional jump in tail position, to the true target
-  // (if the argument is true) or the false target.  The "jump" will
-  // actually bind the jump target if it is forward, jump to it if it
-  // is backward.
-  void Goto(bool where) {
-    ASSERT(!is_used_);
-    JumpTarget* target = where ? true_target_ : false_target_;
-    if (target->is_bound()) {
-      target->Jump();
-    } else {
-      target->Bind();
-    }
-    is_used_ = true;
-    true_is_fall_through_ = where;
-  }
-
-  // Mark this jump target as used as if Goto had been called, but
-  // without generating a jump or binding a label (the control effect
-  // should have already happened).  This is used when the left
-  // subexpression of the short-circuit boolean operators are
-  // compiled.
-  void Use(bool where) {
-    ASSERT(!is_used_);
-    ASSERT((where ? true_target_ : false_target_)->is_bound());
-    is_used_ = true;
-    true_is_fall_through_ = where;
-  }
-
-  // Swap the true and false targets but keep the same actual label as
-  // the fall through.  This is used when compiling negated
-  // expressions, where we want to swap the targets but preserve the
-  // state.
-  void Invert() {
-    JumpTarget* temp_target = true_target_;
-    true_target_ = false_target_;
-    false_target_ = temp_target;
-
-    true_is_fall_through_ = !true_is_fall_through_;
-  }
-
- private:
-  // True and false jump targets.
-  JumpTarget* true_target_;
-  JumpTarget* false_target_;
-
-  // Before using the destination: true if the true target is the
-  // preferred fall through, false if the false target is.  After
-  // using the destination: true if the true target was actually used
-  // as the fall through, false if the false target was.
-  bool true_is_fall_through_;
-
-  // True if the Split or Goto functions have been called.
-  bool is_used_;
-};
-
-
-// -------------------------------------------------------------------------
-// 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 jump target 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.
-//
-// The code generator state is only used for expressions, so statements have
-// the initial state.
-
-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);
-
-  // Create a code generator state based on a code generator's current
-  // state.  The new state may or may not be inside a typeof, and has its
-  // own control destination.
-  CodeGenState(CodeGenerator* owner,
-               TypeofState typeof_state,
-               ControlDestination* destination);
-
-  // Destroy a code generator state and restore the owning code generator's
-  // previous state.
-  ~CodeGenState();
-
-  // Accessors for the state.
-  TypeofState typeof_state() const { return typeof_state_; }
-  ControlDestination* destination() const { return destination_; }
-
- private:
-  // The owning code generator.
-  CodeGenerator* owner_;
-
-  // A flag indicating whether we are compiling the immediate subexpression
-  // of a typeof expression.
-  TypeofState typeof_state_;
-
-  // A control destination in case the expression has a control-flow
-  // effect.
-  ControlDestination* destination_;
-
-  // The previous state of the owning code generator, restored when
-  // this state is destroyed.
-  CodeGenState* previous_;
-};
-
-
-
-
-// -------------------------------------------------------------------------
-// CodeGenerator
-
-class CodeGenerator: public AstVisitor {
- public:
-  // Takes a function literal, generates code for it. This function should only
-  // be called by compiler.cc.
-  static Handle<Code> MakeCode(FunctionLiteral* fun,
-                               Handle<Script> script,
-                               bool is_eval);
-
-#ifdef ENABLE_LOGGING_AND_PROFILING
-  static bool ShouldGenerateLog(Expression* type);
-#endif
-
-  static void SetFunctionInfo(Handle<JSFunction> fun,
-                              int length,
-                              int function_token_position,
-                              int start_position,
-                              int end_position,
-                              bool is_expression,
-                              bool is_toplevel,
-                              Handle<Script> script,
-                              Handle<String> inferred_name);
-
-  // Accessors
-  MacroAssembler* masm() { return masm_; }
-
-  VirtualFrame* frame() const { return frame_; }
-
-  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; }
-
-  void AddDeferred(DeferredCode* code) { deferred_.Add(code); }
-
-  bool in_spilled_code() const { return in_spilled_code_; }
-  void set_in_spilled_code(bool flag) { in_spilled_code_ = flag; }
-
- private:
-  // Construction/Destruction
-  CodeGenerator(int buffer_size, Handle<Script> script, bool is_eval);
-  virtual ~CodeGenerator() { delete masm_; }
-
-  // Accessors
-  Scope* scope() const { return scope_; }
-
-  // Clearing and generating deferred code.
-  void ClearDeferred();
-  void ProcessDeferred();
-
-  bool is_eval() { return is_eval_; }
-
-  // State
-  TypeofState typeof_state() const { return state_->typeof_state(); }
-  ControlDestination* destination() const { return state_->destination(); }
-
-  // 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);
-
-#define DEF_VISIT(type) \
-  void Visit##type(type* node);
-  NODE_LIST(DEF_VISIT)
-#undef DEF_VISIT
-
-  // Visit a statement and then spill the virtual frame if control flow can
-  // reach the end of the statement (ie, it does not exit via break,
-  // continue, return, or throw).  This function is used temporarily while
-  // the code generator is being transformed.
-  void VisitAndSpill(Statement* statement);
-
-  // Visit a list of statements and then spill the virtual frame if control
-  // flow can reach the end of the list.
-  void VisitStatementsAndSpill(ZoneList<Statement*>* statements);
-
-  // Main code generation function
-  void GenCode(FunctionLiteral* fun);
-
-  // 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).
-  void GenerateReturnSequence(Result* return_value);
-
-  // The following are used by class Reference.
-  void LoadReference(Reference* ref);
-  void UnloadReference(Reference* ref);
-
-  Operand ContextOperand(Register context, int index) const {
-    return Operand(context, Context::SlotOffset(index));
-  }
-
-  Operand SlotOperand(Slot* slot, Register tmp);
-
-  Operand ContextSlotOperandCheckExtensions(Slot* slot,
-                                            Result tmp,
-                                            JumpTarget* slow);
-
-  // Expressions
-  Operand GlobalObject() const {
-    return ContextOperand(esi, Context::GLOBAL_INDEX);
-  }
-
-  void LoadCondition(Expression* x,
-                     TypeofState typeof_state,
-                     ControlDestination* destination,
-                     bool force_control);
-  void Load(Expression* x, TypeofState typeof_state = NOT_INSIDE_TYPEOF);
-  void LoadGlobal();
-  void LoadGlobalReceiver();
-
-  // Generate code to push the value of an expression on top of the frame
-  // and then spill the frame fully to memory.  This function is used
-  // temporarily while the code generator is being transformed.
-  void LoadAndSpill(Expression* expression,
-                    TypeofState typeof_state = NOT_INSIDE_TYPEOF);
-
-  // Read a value from a slot and leave it on top of the expression stack.
-  void LoadFromSlot(Slot* slot, TypeofState typeof_state);
-  Result LoadFromGlobalSlotCheckExtensions(Slot* slot,
-                                           TypeofState typeof_state,
-                                           JumpTarget* slow);
-
-  // Store the value on top of the expression stack into a slot, leaving the
-  // value in place.
-  void StoreToSlot(Slot* slot, InitState init_state);
-
-  // 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);
-
-  // Translate the value on top of the frame into control flow to the
-  // control destination.
-  void ToBoolean(ControlDestination* destination);
-
-  void GenericBinaryOperation(
-      Token::Value op,
-      SmiAnalysis* type,
-      OverwriteMode overwrite_mode);
-
-  // If possible, combine two constant smi values using op to produce
-  // a smi result, and push it on the virtual frame, all at compile time.
-  // Returns true if it succeeds.  Otherwise it has no effect.
-  bool FoldConstantSmis(Token::Value op, int left, int right);
-
-  // Emit code to perform a binary operation on a constant
-  // smi and a likely smi.  Consumes the Result *operand.
-  void ConstantSmiBinaryOperation(Token::Value op,
-                                  Result* operand,
-                                  Handle<Object> constant_operand,
-                                  SmiAnalysis* type,
-                                  bool reversed,
-                                  OverwriteMode overwrite_mode);
-
-  // Emit code to perform a binary operation on two likely smis.
-  // The code to handle smi arguments is produced inline.
-  // Consumes the Results *left and *right.
-  void LikelySmiBinaryOperation(Token::Value op,
-                                Result* left,
-                                Result* right,
-                                OverwriteMode overwrite_mode);
-
-  void Comparison(Condition cc,
-                  bool strict,
-                  ControlDestination* destination);
-
-  // To prevent long attacker-controlled byte sequences, integer constants
-  // from the JavaScript source are loaded in two parts if they are larger
-  // than 16 bits.
-  static const int kMaxSmiInlinedBits = 16;
-  bool IsUnsafeSmi(Handle<Object> value);
-  // Load an integer constant x into a register target using
-  // at most 16 bits of user-controlled data per assembly operation.
-  void LoadUnsafeSmi(Register target, Handle<Object> value);
-
-  void CallWithArguments(ZoneList<Expression*>* arguments, int position);
-
-  void CheckStack();
-
-  bool CheckForInlineRuntimeCall(CallRuntime* node);
-  Handle<JSFunction> BuildBoilerplate(FunctionLiteral* node);
-  void ProcessDeclarations(ZoneList<Declaration*>* declarations);
-
-  Handle<Code> ComputeCallInitialize(int argc);
-  Handle<Code> ComputeCallInitializeInLoop(int argc);
-
-  // Declare global variables and functions in the given array of
-  // name/value pairs.
-  void DeclareGlobals(Handle<FixedArray> pairs);
-
-  // Instantiate the function boilerplate.
-  void InstantiateBoilerplate(Handle<JSFunction> boilerplate);
-
-  // Support for type checks.
-  void GenerateIsSmi(ZoneList<Expression*>* args);
-  void GenerateIsNonNegativeSmi(ZoneList<Expression*>* args);
-  void GenerateIsArray(ZoneList<Expression*>* args);
-
-  // Support for arguments.length and arguments[?].
-  void GenerateArgumentsLength(ZoneList<Expression*>* args);
-  void GenerateArgumentsAccess(ZoneList<Expression*>* args);
-
-  // Support for accessing the value field of an object (used by Date).
-  void GenerateValueOf(ZoneList<Expression*>* args);
-  void GenerateSetValueOf(ZoneList<Expression*>* args);
-
-  // Fast support for charCodeAt(n).
-  void GenerateFastCharCodeAt(ZoneList<Expression*>* args);
-
-  // Fast support for object equality testing.
-  void GenerateObjectEquals(ZoneList<Expression*>* args);
-
-  void GenerateLog(ZoneList<Expression*>* args);
-
-
-  // Methods and constants for fast case switch statement support.
-  //
-  // Only allow fast-case switch if the range of labels is at most
-  // this factor times the number of case labels.
-  // Value is derived from comparing the size of code generated by the normal
-  // switch code for Smi-labels to the size of a single pointer. If code
-  // quality increases this number should be decreased to match.
-  static const int kFastSwitchMaxOverheadFactor = 5;
-
-  // Minimal number of switch cases required before we allow jump-table
-  // optimization.
-  static const int kFastSwitchMinCaseCount = 5;
-
-  // The limit of the range of a fast-case switch, as a factor of the number
-  // of cases of the switch. Each platform should return a value that
-  // is optimal compared to the default code generated for a switch statement
-  // on that platform.
-  int FastCaseSwitchMaxOverheadFactor();
-
-  // The minimal number of cases in a switch before the fast-case switch
-  // optimization is enabled. Each platform should return a value that
-  // is optimal compared to the default code generated for a switch statement
-  // on that platform.
-  int FastCaseSwitchMinCaseCount();
-
-  // Allocate a jump table and create code to jump through it.
-  // Should call GenerateFastCaseSwitchCases to generate the code for
-  // all the cases at the appropriate point.
-  void GenerateFastCaseSwitchJumpTable(SwitchStatement* node,
-                                       int min_index,
-                                       int range,
-                                       Label* fail_label,
-                                       Vector<Label*> case_targets,
-                                       Vector<Label> case_labels);
-
-  // Generate the code for cases for the fast case switch.
-  // Called by GenerateFastCaseSwitchJumpTable.
-  void GenerateFastCaseSwitchCases(SwitchStatement* node,
-                                   Vector<Label> case_labels,
-                                   VirtualFrame* start_frame);
-
-  // Fast support for constant-Smi switches.
-  void GenerateFastCaseSwitchStatement(SwitchStatement* node,
-                                       int min_index,
-                                       int range,
-                                       int default_index);
-
-  // Fast support for constant-Smi switches. Tests whether switch statement
-  // permits optimization and calls GenerateFastCaseSwitch if it does.
-  // Returns true if the fast-case switch was generated, and false if not.
-  bool TryGenerateFastCaseSwitchStatement(SwitchStatement* node);
-
-  // 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(Node* node);
-  void CodeForSourcePosition(int pos);
-
-#ifdef DEBUG
-  // True if the registers are valid for entry to a block.  There should be
-  // no frame-external references to eax, ebx, ecx, edx, or edi.
-  bool HasValidEntryRegisters();
-#endif
-
-  bool is_eval_;  // Tells whether code is generated for eval.
-  Handle<Script> script_;
-  List<DeferredCode*> deferred_;
-
-  // Assembler
-  MacroAssembler* masm_;  // to generate code
-
-  // Code generation state
-  Scope* scope_;
-  VirtualFrame* frame_;
-  RegisterAllocator* allocator_;
-  CodeGenState* state_;
-  int loop_nesting_;
-
-  // Jump targets.
-  // The target of the return from the function.
-  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_;
-
-  // True when we are in code that expects the virtual frame to be fully
-  // spilled.  Some virtual frame function are disabled in DEBUG builds when
-  // called from spilled code, because they do not leave the virtual frame
-  // in a spilled state.
-  bool in_spilled_code_;
-
-  friend class VirtualFrame;
-  friend class JumpTarget;
-  friend class Reference;
-  friend class Result;
-
-  DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
-};
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_CODEGEN_IA32_H_