Remove Expression::bounds_, in order to conserve memory during parsing.

src/crankshaft/typing.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CRANKSHAFT_TYPING_H_
 #define V8_CRANKSHAFT_TYPING_H_
 
 #include "src/allocation.h"
+#include "src/ast/ast-type-bounds.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/effects.h"
 #include "src/type-info.h"
 #include "src/types.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
-
 class AstTyper: public AstVisitor {
  public:
   AstTyper(Isolate* isolate, Zone* zone, Handle<JSFunction> closure,
-           Scope* scope, BailoutId osr_ast_id, FunctionLiteral* root);
+           Scope* scope, BailoutId osr_ast_id, FunctionLiteral* root,
+           AstTypeBounds* bounds);
   void Run();
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
  private:
   Effect ObservedOnStack(Object* value);
   void ObserveTypesAtOsrEntry(IterationStatement* stmt);
 
   static const int kNoVar = INT_MIN;
   typedef v8::internal::Effects<int, kNoVar> Effects;
   typedef v8::internal::NestedEffects<int, kNoVar> Store;
 
   Isolate* isolate_;
   Zone* zone_;
   Handle<JSFunction> closure_;
   Scope* scope_;
   BailoutId osr_ast_id_;
   FunctionLiteral* root_;
   TypeFeedbackOracle oracle_;
   Store store_;
+  AstTypeBounds* bounds_;
 
   Zone* zone() const { return zone_; }
   TypeFeedbackOracle* oracle() { return &oracle_; }
 
   void NarrowType(Expression* e, Bounds b) {
-    e->set_bounds(Bounds::Both(e->bounds(), b, zone()));
+    bounds_->set(e, Bounds::Both(bounds_->get(e), b, zone()));
   }
   void NarrowLowerType(Expression* e, Type* t) {
-    e->set_bounds(Bounds::NarrowLower(e->bounds(), t, zone()));
+    bounds_->set(e, Bounds::NarrowLower(bounds_->get(e), t, zone()));
   }
 
   Effects EnterEffects() {
     store_ = store_.Push();
     return store_.Top();
   }
   void ExitEffects() { store_ = store_.Pop(); }
 
   int parameter_index(int index) { return -index - 2; }
   int stack_local_index(int index) { return index; }
@@ skipping 13 matching lines @@
   AST_NODE_LIST(DECLARE_VISIT)
 #undef DECLARE_VISIT
 
   DISALLOW_COPY_AND_ASSIGN(AstTyper);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_TYPING_H_