Merge revisions 3777-3813 from bleding_edge to partial snapshots ...

src/arm/codegen-arm.h

Index: src/arm/codegen-arm.h
===================================================================
--- src/arm/codegen-arm.h	(revision 3890)
+++ src/arm/codegen-arm.h	(working copy)
@@ -161,19 +161,15 @@
 
   // 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,
-                               CompilationInfo* info);
+  static Handle<Code> MakeCode(CompilationInfo* info);
 
   // Printing of AST, etc. as requested by flags.
-  static void MakeCodePrologue(FunctionLiteral* fun);
+  static void MakeCodePrologue(CompilationInfo* info);
 
   // Allocate and install the code.
-  static Handle<Code> MakeCodeEpilogue(FunctionLiteral* fun,
-                                       MacroAssembler* masm,
+  static Handle<Code> MakeCodeEpilogue(MacroAssembler* masm,
                                        Code::Flags flags,
-                                       Handle<Script> script);
+                                       CompilationInfo* info);
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
   static bool ShouldGenerateLog(Expression* type);
@@ -189,7 +185,7 @@
   // Accessors
   MacroAssembler* masm() { return masm_; }
   VirtualFrame* frame() const { return frame_; }
-  Handle<Script> script() { return script_; }
+  inline Handle<Script> script();
 
   bool has_valid_frame() const { return frame_ != NULL; }
 
@@ -212,16 +208,15 @@
 
  private:
   // Construction/Destruction
-  CodeGenerator(MacroAssembler* masm, Handle<Script> script, bool is_eval);
+  explicit CodeGenerator(MacroAssembler* masm);
 
   // Accessors
-  Scope* scope() const { return scope_; }
+  inline bool is_eval();
+  Scope* scope();
 
   // Generating deferred code.
   void ProcessDeferred();
 
-  bool is_eval() { return is_eval_; }
-
   // State
   bool has_cc() const  { return cc_reg_ != al; }
   JumpTarget* true_target() const  { return state_->true_target(); }
@@ -249,7 +244,7 @@
   inline void VisitStatementsAndSpill(ZoneList<Statement*>* statements);
 
   // Main code generation function
-  void Generate(FunctionLiteral* fun, Mode mode, CompilationInfo* info);
+  void Generate(CompilationInfo* info, Mode mode);
 
   // The following are used by class Reference.
   void LoadReference(Reference* ref);
@@ -425,16 +420,14 @@
   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
 
+  CompilationInfo* info_;
+
   // Code generation state
-  Scope* scope_;
   VirtualFrame* frame_;
   RegisterAllocator* allocator_;
   Condition cc_reg_;
@@ -538,6 +531,74 @@
 };
 
 
+class StringStubBase: public CodeStub {
+ public:
+  // Generate code for copying characters using a simple loop. This should only
+  // be used in places where the number of characters is small and the
+  // additional setup and checking in GenerateCopyCharactersLong adds too much
+  // overhead. Copying of overlapping regions is not supported.
+  // Dest register ends at the position after the last character written.
+  void GenerateCopyCharacters(MacroAssembler* masm,
+                              Register dest,
+                              Register src,
+                              Register count,
+                              Register scratch,
+                              bool ascii);
+
+  // Generate code for copying a large number of characters. This function
+  // is allowed to spend extra time setting up conditions to make copying
+  // faster. Copying of overlapping regions is not supported.
+  // Dest register ends at the position after the last character written.
+  void GenerateCopyCharactersLong(MacroAssembler* masm,
+                                  Register dest,
+                                  Register src,
+                                  Register count,
+                                  Register scratch1,
+                                  Register scratch2,
+                                  Register scratch3,
+                                  Register scratch4,
+                                  Register scratch5,
+                                  int flags);
+};
+
+
+// Flag that indicates how to generate code for the stub StringAddStub.
+enum StringAddFlags {
+  NO_STRING_ADD_FLAGS = 0,
+  NO_STRING_CHECK_IN_STUB = 1 << 0  // Omit string check in stub.
+};
+
+
+class StringAddStub: public StringStubBase {
+ public:
+  explicit StringAddStub(StringAddFlags flags) {
+    string_check_ = ((flags & NO_STRING_CHECK_IN_STUB) == 0);
+  }
+
+ private:
+  Major MajorKey() { return StringAdd; }
+  int MinorKey() { return string_check_ ? 0 : 1; }
+
+  void Generate(MacroAssembler* masm);
+
+  // Should the stub check whether arguments are strings?
+  bool string_check_;
+};
+
+
+class SubStringStub: public StringStubBase {
+ public:
+  SubStringStub() {}
+
+ private:
+  Major MajorKey() { return SubString; }
+  int MinorKey() { return 0; }
+
+  void Generate(MacroAssembler* masm);
+};
+
+
+
 class StringCompareStub: public CodeStub {
  public:
   StringCompareStub() { }