Remove unused code. This code used to be used to "decide" if a call

to eval is aliased.  Now that we correctly track eval aliasing, we do
not need this code.
Review URL: http://codereview.chromium.org/20078

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1228 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/scopeinfo.cc

@@ -50,7 +50,6 @@ static int CompareLocal(Variable* const* v, Variable* const* w) {
 template<class Allocator>
 ScopeInfo<Allocator>::ScopeInfo(Scope* scope)
     : function_name_(Factory::empty_symbol()),
-      supports_eval_(scope->SupportsEval()),
       parameters_(scope->num_parameters()),
       stack_slots_(scope->num_stack_slots()),
       context_slots_(scope->num_heap_slots()),
@@ -151,7 +150,6 @@ ScopeInfo<Allocator>::ScopeInfo(Scope* scope)
 // Encoding format in the Code object:
 //
 // - function name
-// - supports eval info
 //
 // - number of variables in the context object (smi) (= function context
 //   slot index + 1)
@@ -247,7 +245,6 @@ static Object** ReadList(Object** p,
 template<class Allocator>
 ScopeInfo<Allocator>::ScopeInfo(Code* code)
   : function_name_(Factory::empty_symbol()),
-    supports_eval_(false),
     parameters_(4),
     stack_slots_(8),
     context_slots_(8),
@@ -257,7 +254,6 @@ ScopeInfo<Allocator>::ScopeInfo(Code* code)
   Object** p0 = &Memory::Object_at(code->sinfo_start());
   Object** p = p0;
   p = ReadSymbol(p, &function_name_);
-  p = ReadBool(p, &supports_eval_);
   p = ReadList<Allocator>(p, &context_slots_, &context_modes_);
   p = ReadList<Allocator>(p, &parameters_);
   p = ReadList<Allocator>(p, &stack_slots_);
@@ -310,8 +306,8 @@ static Object** WriteList(Object** p,
 
 template<class Allocator>
 int ScopeInfo<Allocator>::Serialize(Code* code) {
-  // function name, supports eval, length & sentinel for 3 tables:
-  const int extra_slots = 1 + 1 + 2 * 3;
+  // function name, length & sentinel for 3 tables:
+  const int extra_slots = 1 + 2 * 3;
   int size = (extra_slots +
               context_slots_.length() * 2 +
               parameters_.length() +
@@ -322,7 +318,6 @@ int ScopeInfo<Allocator>::Serialize(Code* code) {
     Object** p0 = &Memory::Object_at(code->sinfo_start());
     Object** p = p0;
     p = WriteSymbol(p, function_name_);
-    p = WriteInt(p, supports_eval_);
     p = WriteList(p, &context_slots_, &context_modes_);
     p = WriteList(p, &parameters_);
     p = WriteList(p, &stack_slots_);
@@ -343,8 +338,8 @@ void ScopeInfo<Allocator>::IterateScopeInfo(Code* code, ObjectVisitor* v) {
 
 static Object** ContextEntriesAddr(Code* code) {
   ASSERT(code->sinfo_size() > 0);
-  // +2 for function name, supports eval:
-  return &Memory::Object_at(code->sinfo_start()) + 2;
+  // +1 for function name:
+  return &Memory::Object_at(code->sinfo_start()) + 1;
 }
 
 
@@ -366,21 +361,6 @@ static Object** StackSlotEntriesAddr(Code* code) {
 }
 
 
-template<class Allocator>
-bool ScopeInfo<Allocator>::SupportsEval(Code* code) {
-  bool result = false;
-  if (code->sinfo_size() > 0) {
-    ReadBool(&Memory::Object_at(code->sinfo_start()) + 1, &result);
-  }
-#ifdef DEBUG
-  { ScopeInfo info(code);
-    ASSERT(result == info.supports_eval_);
-  }
-#endif
-  return result;
-}
-
-
 template<class Allocator>
 int ScopeInfo<Allocator>::NumberOfStackSlots(Code* code) {
   if (code->sinfo_size() > 0) {
@@ -551,9 +531,6 @@ void ScopeInfo<Allocator>::Print() {
     PrintF("/* no function name */");
   PrintF("{");
 
-  if (supports_eval_)
-    PrintF("\n  // supports eval\n");
-
   PrintList<Allocator>("parameters", 0, parameters_);
   PrintList<Allocator>("stack slots", 0, stack_slots_);
   PrintList<Allocator>("context slots", Context::MIN_CONTEXT_SLOTS,

src/scopeinfo.h

@@ -75,8 +75,6 @@ class ScopeInfo BASE_EMBEDDED {
 
   Handle<String> function_name() const  { return function_name_; }
 
-  bool supports_eval() const  { return supports_eval_; }
-
   Handle<String> parameter_name(int i) const  { return parameters_[i]; }
   int number_of_parameters() const  { return parameters_.length(); }
 
@@ -104,8 +102,6 @@ class ScopeInfo BASE_EMBEDDED {
   // encoding of it's information in a Code object, which is why these
   // functions are in this class.
 
-  static bool SupportsEval(Code* code);
-
   // Return the number of stack slots for code.
   static int NumberOfStackSlots(Code* code);
 
@@ -146,7 +142,6 @@ class ScopeInfo BASE_EMBEDDED {
 
  private:
   Handle<String> function_name_;
-  bool supports_eval_;
   List<Handle<String>, Allocator > parameters_;
   List<Handle<String>, Allocator > stack_slots_;
   List<Handle<String>, Allocator > context_slots_;

src/scopes.cc

@@ -324,11 +324,6 @@ void Scope::AllocateVariables() {
 }
 
 
-bool Scope::SupportsEval() const {
-  return scope_calls_eval_ || inner_scope_calls_eval_;
-}
-
-
 bool Scope::AllowsLazyCompilation() const {
   return !force_eager_compilation_ && HasTrivialOuterContext();
 }

src/scopes.h

@@ -222,10 +222,6 @@ class Scope: public ZoneObject {
   int num_stack_slots() const  { return num_stack_slots_; }
   int num_heap_slots() const  { return num_heap_slots_; }
 
-  // True if this scope supports calling eval (has a properly
-  // initialized context).
-  bool SupportsEval() const;
-
   // Make sure this scope and all outer scopes are eagerly compiled.
   void ForceEagerCompilation()  { force_eager_compilation_ = true; }