Merge revision 3813 to 3930 from bleeding_edge to partial snapshots branch.

src/compiler.h

Index: src/compiler.h
===================================================================
--- src/compiler.h	(revision 3935)
+++ src/compiler.h	(working copy)
@@ -28,8 +28,10 @@
 #ifndef V8_COMPILER_H_
 #define V8_COMPILER_H_
 
+#include "ast.h"
 #include "frame-element.h"
 #include "parser.h"
+#include "register-allocator.h"
 #include "zone.h"
 
 namespace v8 {
@@ -39,6 +41,37 @@
 // is constructed based on the resources available at compile-time.
 class CompilationInfo BASE_EMBEDDED {
  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
+  };
+
+  // A description of the compilation state at a bailout to the secondary
+  // code generator.
+  //
+  // The state is currently simple: there are no parameters or local
+  // variables to worry about ('this' can be found in the stack frame).
+  // There are at most two live values.
+  //
+  // There is a label that should be bound to the beginning of the bailout
+  // stub code.
+  class Bailout : public ZoneObject {
+   public:
+    Bailout(Register left, Register right) : left_(left), right_(right) {}
+
+    Label* label() { return &label_; }
+
+   private:
+    Register left_;
+    Register right_;
+    Label label_;
+  };
+
+
   // Lazy compilation of a JSFunction.
   CompilationInfo(Handle<JSFunction> closure,
                   int loop_nesting,
@@ -115,9 +148,13 @@
   int loop_nesting() { return loop_nesting_; }
   bool has_receiver() { return !receiver_.is_null(); }
   Handle<Object> receiver() { return receiver_; }
+  List<Bailout*>* bailouts() { return &bailouts_; }
 
-  // Accessors for mutable fields, possibly set by analysis passes with
+  // Accessors for mutable fields (possibly set by analysis passes) with
   // default values given by Initialize.
+  Mode mode() { return mode_; }
+  void set_mode(Mode mode) { mode_ = mode; }
+
   bool has_this_properties() { return has_this_properties_; }
   void set_has_this_properties(bool flag) { has_this_properties_ = flag; }
 
@@ -135,8 +172,19 @@
   // Derived accessors.
   Scope* scope() { return function()->scope(); }
 
+  // Add a bailout with two live values.
+  Label* AddBailout(Register left, Register right) {
+    Bailout* bailout = new Bailout(left, right);
+    bailouts_.Add(bailout);
+    return bailout->label();
+  }
+
+  // Add a bailout with no live values.
+  Label* AddBailout() { return AddBailout(no_reg, no_reg); }
+
  private:
   void Initialize() {
+    mode_ = PRIMARY;
     has_this_properties_ = false;
     has_globals_ = false;
   }
@@ -146,6 +194,7 @@
   Handle<Script> script_;
 
   FunctionLiteral* function_;
+  Mode mode_;
 
   bool is_eval_;
   int loop_nesting_;
@@ -155,6 +204,10 @@
   bool has_this_properties_;
   bool has_globals_;
 
+  // An ordered list of bailout points encountered during fast-path
+  // compilation.
+  List<Bailout*> bailouts_;
+
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
 };
 
@@ -183,7 +236,8 @@
                                     Handle<Object> script_name,
                                     int line_offset, int column_offset,
                                     v8::Extension* extension,
-                                    ScriptDataImpl* script_Data,
+                                    ScriptDataImpl* pre_data,
+                                    Handle<Object> script_data,
                                     NativesFlag is_natives_code);
 
   // Compile a String source within a context for Eval.