[turbofan] Ensure lazy bailout point in exception handler.

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index 0dc9e6066630898e326880092c60b157e4e8e6a7..7bdd520bbaf6e6559e8dae2f273facfb6bf1969f 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1163,12 +1163,27 @@ 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_;
 };