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

src/crankshaft/hydrogen.h

 // Copyright 2012 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_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
+#include "src/ast/ast-type-bounds.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/compiler.h"
 #include "src/crankshaft/compilation-phase.h"
 #include "src/crankshaft/hydrogen-instructions.h"
 #include "src/parsing/parser.h"
 #include "src/zone.h"
 
 namespace v8 {
@@ skipping 2156 matching lines @@
   void Bailout(BailoutReason reason);
 
   HBasicBlock* CreateJoin(HBasicBlock* first,
                           HBasicBlock* second,
                           BailoutId join_id);
 
   FunctionState* function_state() const { return function_state_; }
 
   void VisitDeclarations(ZoneList<Declaration*>* declarations) override;
 
+  AstTypeBounds* bounds() { return &bounds_; }
+
   void* operator new(size_t size, Zone* zone) { return zone->New(size); }
   void operator delete(void* pointer, Zone* zone) { }
   void operator delete(void* pointer) { }
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
  protected:
   // Forward declarations for inner scope classes.
   class SubgraphScope;
 
@@ skipping 713 matching lines @@
   // A stack of breakable statements entered.
   BreakAndContinueScope* break_scope_;
 
   int inlined_count_;
   ZoneList<Handle<Object> > globals_;
 
   bool inline_bailout_;
 
   HOsrBuilder* osr_;
 
+  AstTypeBounds bounds_;
+
   friend class FunctionState;  // Pushes and pops the state stack.
   friend class AstContext;  // Pushes and pops the AST context stack.
   friend class KeyedLoadFastElementStub;
   friend class HOsrBuilder;
 
   DISALLOW_COPY_AND_ASSIGN(HOptimizedGraphBuilder);
 };
 
 
 Zone* AstContext::zone() const { return owner_->zone(); }
@@ skipping 173 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_