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       1              : // Copyright (C) 2026 Free Software Foundation, Inc.
       2              : 
       3              : // This file is part of GCC.
       4              : 
       5              : // GCC is free software; you can redistribute it and/or modify it under
       6              : // the terms of the GNU General Public License as published by the Free
       7              : // Software Foundation; either version 3, or (at your option) any later
       8              : // version.
       9              : 
      10              : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11              : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12              : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13              : // for more details.
      14              : 
      15              : // You should have received a copy of the GNU General Public License
      16              : // along with GCC; see the file COPYING3.  If not see
      17              : // <http://www.gnu.org/licenses/>.
      18              : 
      19              : #ifndef RUST_BIR_DROP_ANALYSIS_H
      20              : #define RUST_BIR_DROP_ANALYSIS_H
      21              : 
      22              : #include "rust-bir.h"
      23              : 
      24              : namespace Rust {
      25              : namespace BIR {
      26              : 
      27              : /*
      28              :   Classifies scheduled whole-local BIR Drop statements according to
      29              :   whether their place is initialized at the drop point.
      30              : 
      31              :   This initial implementation only handles straight-line control flow.
      32              : */
      33           25 : class DropAnalysis
      34              : {
      35              : public:
      36              :   static DropAnalysis &get ();
      37              : 
      38              :   void clear ();
      39              :   void analyze (Function &function);
      40              : 
      41              :   bool is_definitely_dead (HirId id) const;
      42              : 
      43              : private:
      44              :   std::set<HirId> definitely_dead;
      45              : };
      46              : 
      47              : } // namespace BIR
      48              : } // namespace Rust
      49              : 
      50              : #endif // RUST_BIR_DROP_ANALYSIS_H