Upgrade V8 to 2.1.0

1 files changed, 452 insertions, 0 deletions

diff --git a/deps/v8/src/full-codegen.h b/deps/v8/src/full-codegen.h
new file mode 100644
index 000000000..6688ff7c5
--- /dev/null
+++ b/deps/v8/src/full-codegen.h
@@ -0,0 +1,452 @@
+// Copyright 2009 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_FULL_CODEGEN_H_
+#define V8_FULL_CODEGEN_H_
+
+#include "v8.h"
+
+#include "ast.h"
+
+namespace v8 {
+namespace internal {
+
+class FullCodeGenSyntaxChecker: public AstVisitor {
+ public:
+  FullCodeGenSyntaxChecker() : has_supported_syntax_(true) {}
+
+  void Check(FunctionLiteral* fun);
+
+  bool has_supported_syntax() { return has_supported_syntax_; }
+
+ private:
+  void VisitDeclarations(ZoneList<Declaration*>* decls);
+  void VisitStatements(ZoneList<Statement*>* stmts);
+
+  // AST node visit functions.
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
+  AST_NODE_LIST(DECLARE_VISIT)
+#undef DECLARE_VISIT
+
+  bool has_supported_syntax_;
+
+  DISALLOW_COPY_AND_ASSIGN(FullCodeGenSyntaxChecker);
+};
+
+
+// -----------------------------------------------------------------------------
+// Full code generator.
+
+class FullCodeGenerator: public AstVisitor {
+ public:
+  enum Mode {
+    PRIMARY,
+    SECONDARY
+  };
+
+  FullCodeGenerator(MacroAssembler* masm, Handle<Script> script, bool is_eval)
+      : masm_(masm),
+        script_(script),
+        is_eval_(is_eval),
+        function_(NULL),
+        nesting_stack_(NULL),
+        loop_depth_(0),
+        location_(kStack),
+        true_label_(NULL),
+        false_label_(NULL) {
+  }
+
+  static Handle<Code> MakeCode(FunctionLiteral* fun,
+                               Handle<Script> script,
+                               bool is_eval);
+
+  void Generate(FunctionLiteral* fun, Mode mode);
+
+ private:
+  class Breakable;
+  class Iteration;
+  class TryCatch;
+  class TryFinally;
+  class Finally;
+  class ForIn;
+
+  class NestedStatement BASE_EMBEDDED {
+   public:
+    explicit NestedStatement(FullCodeGenerator* codegen) : codegen_(codegen) {
+      // Link into codegen's nesting stack.
+      previous_ = codegen->nesting_stack_;
+      codegen->nesting_stack_ = this;
+    }
+    virtual ~NestedStatement() {
+      // Unlink from codegen's nesting stack.
+      ASSERT_EQ(this, codegen_->nesting_stack_);
+      codegen_->nesting_stack_ = previous_;
+    }
+
+    virtual Breakable* AsBreakable() { return NULL; }
+    virtual Iteration* AsIteration() { return NULL; }
+    virtual TryCatch* AsTryCatch() { return NULL; }
+    virtual TryFinally* AsTryFinally() { return NULL; }
+    virtual Finally* AsFinally() { return NULL; }
+    virtual ForIn* AsForIn() { return NULL; }
+
+    virtual bool IsContinueTarget(Statement* target) { return false; }
+    virtual bool IsBreakTarget(Statement* target) { return false; }
+
+    // Generate code to leave the nested statement. This includes
+    // cleaning up any stack elements in use and restoring the
+    // stack to the expectations of the surrounding statements.
+    // Takes a number of stack elements currently on top of the
+    // nested statement's stack, and returns a number of stack
+    // elements left on top of the surrounding statement's stack.
+    // The generated code must preserve the result register (which
+    // contains the value in case of a return).
+    virtual int Exit(int stack_depth) {
+      // Default implementation for the case where there is
+      // nothing to clean up.
+      return stack_depth;
+    }
+    NestedStatement* outer() { return previous_; }
+   protected:
+    MacroAssembler* masm() { return codegen_->masm(); }
+   private:
+    FullCodeGenerator* codegen_;
+    NestedStatement* previous_;
+    DISALLOW_COPY_AND_ASSIGN(NestedStatement);
+  };
+
+  class Breakable : public NestedStatement {
+   public:
+    Breakable(FullCodeGenerator* codegen,
+              BreakableStatement* break_target)
+        : NestedStatement(codegen),
+          target_(break_target) {}
+    virtual ~Breakable() {}
+    virtual Breakable* AsBreakable() { return this; }
+    virtual bool IsBreakTarget(Statement* statement) {
+      return target_ == statement;
+    }
+    BreakableStatement* statement() { return target_; }
+    Label* break_target() { return &break_target_label_; }
+   private:
+    BreakableStatement* target_;
+    Label break_target_label_;
+    DISALLOW_COPY_AND_ASSIGN(Breakable);
+  };
+
+  class Iteration : public Breakable {
+   public:
+    Iteration(FullCodeGenerator* codegen,
+              IterationStatement* iteration_statement)
+        : Breakable(codegen, iteration_statement) {}
+    virtual ~Iteration() {}
+    virtual Iteration* AsIteration() { return this; }
+    virtual bool IsContinueTarget(Statement* statement) {
+      return this->statement() == statement;
+    }
+    Label* continue_target() { return &continue_target_label_; }
+   private:
+    Label continue_target_label_;
+    DISALLOW_COPY_AND_ASSIGN(Iteration);
+  };
+
+  // The environment inside the try block of a try/catch statement.
+  class TryCatch : public NestedStatement {
+   public:
+    explicit TryCatch(FullCodeGenerator* codegen, Label* catch_entry)
+        : NestedStatement(codegen), catch_entry_(catch_entry) { }
+    virtual ~TryCatch() {}
+    virtual TryCatch* AsTryCatch() { return this; }
+    Label* catch_entry() { return catch_entry_; }
+    virtual int Exit(int stack_depth);
+   private:
+    Label* catch_entry_;
+    DISALLOW_COPY_AND_ASSIGN(TryCatch);
+  };
+
+  // The environment inside the try block of a try/finally statement.
+  class TryFinally : public NestedStatement {
+   public:
+    explicit TryFinally(FullCodeGenerator* codegen, Label* finally_entry)
+        : NestedStatement(codegen), finally_entry_(finally_entry) { }
+    virtual ~TryFinally() {}
+    virtual TryFinally* AsTryFinally() { return this; }
+    Label* finally_entry() { return finally_entry_; }
+    virtual int Exit(int stack_depth);
+   private:
+    Label* finally_entry_;
+    DISALLOW_COPY_AND_ASSIGN(TryFinally);
+  };
+
+  // A FinallyEnvironment represents being inside a finally block.
+  // Abnormal termination of the finally block needs to clean up
+  // the block's parameters from the stack.
+  class Finally : public NestedStatement {
+   public:
+    explicit Finally(FullCodeGenerator* codegen) : NestedStatement(codegen) { }
+    virtual ~Finally() {}
+    virtual Finally* AsFinally() { return this; }
+    virtual int Exit(int stack_depth) {
+      return stack_depth + kFinallyStackElementCount;
+    }
+   private:
+    // Number of extra stack slots occupied during a finally block.
+    static const int kFinallyStackElementCount = 2;
+    DISALLOW_COPY_AND_ASSIGN(Finally);
+  };
+
+  // A ForInEnvironment represents being inside a for-in loop.
+  // Abnormal termination of the for-in block needs to clean up
+  // the block's temporary storage from the stack.
+  class ForIn : public Iteration {
+   public:
+    ForIn(FullCodeGenerator* codegen,
+          ForInStatement* statement)
+        : Iteration(codegen, statement) { }
+    virtual ~ForIn() {}
+    virtual ForIn* AsForIn() { return this; }
+    virtual int Exit(int stack_depth) {
+      return stack_depth + kForInStackElementCount;
+    }
+   private:
+    // TODO(lrn): Check that this value is correct when implementing
+    // for-in.
+    static const int kForInStackElementCount = 5;
+    DISALLOW_COPY_AND_ASSIGN(ForIn);
+  };
+
+  enum Location {
+    kAccumulator,
+    kStack
+  };
+
+  int SlotOffset(Slot* slot);
+
+  // Emit code to convert a pure value (in a register, slot, as a literal,
+  // or on top of the stack) into the result expected according to an
+  // expression context.
+  void Apply(Expression::Context context, Register reg);
+
+  // Slot cannot have type Slot::LOOKUP.
+  void Apply(Expression::Context context, Slot* slot);
+
+  void Apply(Expression::Context context, Literal* lit);
+  void ApplyTOS(Expression::Context context);
+
+  // Emit code to discard count elements from the top of stack, then convert
+  // a pure value into the result expected according to an expression
+  // context.
+  void DropAndApply(int count, Expression::Context context, Register reg);
+
+  // Emit code to convert pure control flow to a pair of labels into the
+  // result expected according to an expression context.
+  void Apply(Expression::Context context,
+             Label* materialize_true,
+             Label* materialize_false);
+
+  // Helper function to convert a pure value into a test context.  The value
+  // is expected on the stack or the accumulator, depending on the platform.
+  // See the platform-specific implementation for details.
+  void DoTest(Expression::Context context);
+
+  void Move(Slot* dst, Register source, Register scratch1, Register scratch2);
+  void Move(Register dst, Slot* source);
+
+  // Return an operand used to read/write to a known (ie, non-LOOKUP) slot.
+  // May emit code to traverse the context chain, destroying the scratch
+  // register.
+  MemOperand EmitSlotSearch(Slot* slot, Register scratch);
+
+  void VisitForEffect(Expression* expr) {
+    Expression::Context saved_context = context_;
+    context_ = Expression::kEffect;
+    Visit(expr);
+    context_ = saved_context;
+  }
+
+  void VisitForValue(Expression* expr, Location where) {
+    Expression::Context saved_context = context_;
+    Location saved_location = location_;
+    context_ = Expression::kValue;
+    location_ = where;
+    Visit(expr);
+    context_ = saved_context;
+    location_ = saved_location;
+  }
+
+  void VisitForControl(Expression* expr, Label* if_true, Label* if_false) {
+    Expression::Context saved_context = context_;
+    Label* saved_true = true_label_;
+    Label* saved_false = false_label_;
+    context_ = Expression::kTest;
+    true_label_ = if_true;
+    false_label_ = if_false;
+    Visit(expr);
+    context_ = saved_context;
+    true_label_ = saved_true;
+    false_label_ = saved_false;
+  }
+
+  void VisitForValueControl(Expression* expr,
+                            Location where,
+                            Label* if_true,
+                            Label* if_false) {
+    Expression::Context saved_context = context_;
+    Location saved_location = location_;
+    Label* saved_true = true_label_;
+    Label* saved_false = false_label_;
+    context_ = Expression::kValueTest;
+    location_ = where;
+    true_label_ = if_true;
+    false_label_ = if_false;
+    Visit(expr);
+    context_ = saved_context;
+    location_ = saved_location;
+    true_label_ = saved_true;
+    false_label_ = saved_false;
+  }
+
+  void VisitForControlValue(Expression* expr,
+                            Location where,
+                            Label* if_true,
+                            Label* if_false) {
+    Expression::Context saved_context = context_;
+    Location saved_location = location_;
+    Label* saved_true = true_label_;
+    Label* saved_false = false_label_;
+    context_ = Expression::kTestValue;
+    location_ = where;
+    true_label_ = if_true;
+    false_label_ = if_false;
+    Visit(expr);
+    context_ = saved_context;
+    location_ = saved_location;
+    true_label_ = saved_true;
+    false_label_ = saved_false;
+  }
+
+  void VisitDeclarations(ZoneList<Declaration*>* declarations);
+  void DeclareGlobals(Handle<FixedArray> pairs);
+
+  // Platform-specific return sequence
+  void EmitReturnSequence(int position);
+
+  // Platform-specific code sequences for calls
+  void EmitCallWithStub(Call* expr);
+  void EmitCallWithIC(Call* expr, Handle<Object> name, RelocInfo::Mode mode);
+
+  // Platform-specific code for loading variables.
+  void EmitVariableLoad(Variable* expr, Expression::Context context);
+
+  // Platform-specific support for compiling assignments.
+
+  // Load a value from a named property.
+  // The receiver is left on the stack by the IC.
+  void EmitNamedPropertyLoad(Property* expr);
+
+  // Load a value from a keyed property.
+  // The receiver and the key is left on the stack by the IC.
+  void EmitKeyedPropertyLoad(Property* expr);
+
+  // Apply the compound assignment operator. Expects the left operand on top
+  // of the stack and the right one in the accumulator.
+  void EmitBinaryOp(Token::Value op, Expression::Context context);
+
+  // Complete a variable assignment.  The right-hand-side value is expected
+  // in the accumulator.
+  void EmitVariableAssignment(Variable* var, Expression::Context context);
+
+  // Complete a named property assignment.  The receiver is expected on top
+  // of the stack and the right-hand-side value in the accumulator.
+  void EmitNamedPropertyAssignment(Assignment* expr);
+
+  // Complete a keyed property assignment.  The receiver and key are
+  // expected on top of the stack and the right-hand-side value in the
+  // accumulator.
+  void EmitKeyedPropertyAssignment(Assignment* expr);
+
+  void SetFunctionPosition(FunctionLiteral* fun);
+  void SetReturnPosition(FunctionLiteral* fun);
+  void SetStatementPosition(Statement* stmt);
+  void SetStatementPosition(int pos);
+  void SetSourcePosition(int pos);
+
+  // Non-local control flow support.
+  void EnterFinallyBlock();
+  void ExitFinallyBlock();
+
+  // Loop nesting counter.
+  int loop_depth() { return loop_depth_; }
+  void increment_loop_depth() { loop_depth_++; }
+  void decrement_loop_depth() {
+    ASSERT(loop_depth_ > 0);
+    loop_depth_--;
+  }
+
+  MacroAssembler* masm() { return masm_; }
+  static Register result_register();
+  static Register context_register();
+
+  // Set fields in the stack frame. Offsets are the frame pointer relative
+  // offsets defined in, e.g., StandardFrameConstants.
+  void StoreToFrameField(int frame_offset, Register value);
+
+  // Load a value from the current context. Indices are defined as an enum
+  // in v8::internal::Context.
+  void LoadContextField(Register dst, int context_index);
+
+  // AST node visit functions.
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
+  AST_NODE_LIST(DECLARE_VISIT)
+#undef DECLARE_VISIT
+  // Handles the shortcutted logical binary operations in VisitBinaryOperation.
+  void EmitLogicalOperation(BinaryOperation* expr);
+
+  MacroAssembler* masm_;
+  Handle<Script> script_;
+  bool is_eval_;
+
+  FunctionLiteral* function_;
+
+  Label return_label_;
+  NestedStatement* nesting_stack_;
+  int loop_depth_;
+
+  Expression::Context context_;
+  Location location_;
+  Label* true_label_;
+  Label* false_label_;
+
+  friend class NestedStatement;
+
+  DISALLOW_COPY_AND_ASSIGN(FullCodeGenerator);
+};
+
+
+} }  // namespace v8::internal
+
+#endif  // V8_FULL_CODEGEN_H_