[turbofan] Ensure lazy bailout point in exception handler.

src/ast.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_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 1145 matching lines @@
   Statement* then_statement_;
   Statement* else_statement_;
   int base_id_;
 };
 
 
 class TryStatement : public Statement {
  public:
   Block* try_block() const { return try_block_; }
 
+  void set_base_id(int id) { base_id_ = id; }
+  static int num_ids() { return parent_num_ids() + 1; }
+  BailoutId HandlerId() const { return BailoutId(local_id(0)); }
+
  protected:
   TryStatement(Zone* zone, Block* try_block, int pos)
-      : Statement(zone, pos), try_block_(try_block) {}
+      : Statement(zone, pos),
+        try_block_(try_block),
+        base_id_(BailoutId::None().ToInt()) {}
+  static int parent_num_ids() { return 0; }
+
+  int base_id() const {
+    DCHECK(!BailoutId(base_id_).IsNone());
+    return base_id_;
+  }
 
  private:
+  int local_id(int n) const { return base_id() + parent_num_ids() + n; }
+
   Block* try_block_;
+  int base_id_;
 };
 
 
 class TryCatchStatement final : public TryStatement {
  public:
   DECLARE_NODE_TYPE(TryCatchStatement)
 
   Scope* scope() { return scope_; }
   Variable* variable() { return variable_; }
   Block* catch_block() const { return catch_block_; }
@@ skipping 2415 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_