Remove redundant ids from AST

src/ast.cc

 // 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.
 
 #include "src/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 87 matching lines @@
 }
 
 
 Assignment::Assignment(Zone* zone, Token::Value op, Expression* target,
                        Expression* value, int pos, IdGen* id_gen)
     : Expression(zone, pos, id_gen),
       op_(op),
       target_(target),
       value_(value),
       binary_operation_(NULL),
-      assignment_id_(id_gen->GetNextId()),
       is_uninitialized_(false),
-      store_mode_(STANDARD_STORE) {}
+      store_mode_(STANDARD_STORE) {
+#ifdef DEBUG
+    int assignment_id =
+#endif
+    id_gen->ReserveIdRange(kClassIdRange);  // reserve assignment id
+    DCHECK(assignment_id == AssignmentId().ToInt());
+  }
 
 
 Token::Value Assignment::binary_op() const {
   switch (op_) {
     case Token::ASSIGN_BIT_OR: return Token::BIT_OR;
     case Token::ASSIGN_BIT_XOR: return Token::BIT_XOR;
     case Token::ASSIGN_BIT_AND: return Token::BIT_AND;
     case Token::ASSIGN_SHL: return Token::SHL;
     case Token::ASSIGN_SAR: return Token::SAR;
     case Token::ASSIGN_SHR: return Token::SHR;
@@ skipping 864 matching lines @@
     max_match_ = IncreaseBy(max_match_, node_max_match);
   }
 }
 
 
 CaseClause::CaseClause(Zone* zone, Expression* label,
                        ZoneList<Statement*>* statements, int pos, IdGen* id_gen)
     : Expression(zone, pos, id_gen),
       label_(label),
       statements_(statements),
-      compare_type_(Type::None(zone)),
-      compare_id_(id_gen->GetNextId()),
-      entry_id_(id_gen->GetNextId()) {}
-
+      compare_type_(Type::None(zone)) {
+#ifdef DEBUG
+    int compare_id =
+#endif
+    id_gen->ReserveIdRange(kClassIdRange);
+    DCHECK(compare_id == CompareId().ToInt());
+  }
 
 #define REGULAR_NODE(NodeType) \
   void AstConstructionVisitor::Visit##NodeType(NodeType* node) { \
     increase_node_count(); \
   }
 #define REGULAR_NODE_WITH_FEEDBACK_SLOTS(NodeType) \
   void AstConstructionVisitor::Visit##NodeType(NodeType* node) { \
     increase_node_count(); \
     add_slot_node(node); \
   }
@@ skipping 117 matching lines @@
     SNPrintF(buffer, "%d", Smi::cast(*value())->value());
     str = arr;
   } else {
     str = DoubleToCString(value()->Number(), buffer);
   }
   return isolate_->factory()->NewStringFromAsciiChecked(str);
 }
 
 
 } }  // namespace v8::internal