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       1                 :             : // rust-gcc.cc -- Rust frontend to gcc IR.
       2                 :             : // Copyright (C) 2011-2024 Free Software Foundation, Inc.
       3                 :             : // Contributed by Ian Lance Taylor, Google.
       4                 :             : // forked from gccgo
       5                 :             : 
       6                 :             : // This file is part of GCC.
       7                 :             : 
       8                 :             : // GCC is free software; you can redistribute it and/or modify it under
       9                 :             : // the terms of the GNU General Public License as published by the Free
      10                 :             : // Software Foundation; either version 3, or (at your option) any later
      11                 :             : // version.
      12                 :             : 
      13                 :             : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      14                 :             : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      15                 :             : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      16                 :             : // for more details.
      17                 :             : 
      18                 :             : // You should have received a copy of the GNU General Public License
      19                 :             : // along with GCC; see the file COPYING3.  If not see
      20                 :             : // <http://www.gnu.org/licenses/>.
      21                 :             : 
      22                 :             : // This has to be included outside of extern "C", so we have to
      23                 :             : // include it here before tree.h includes it later.
      24                 :             : 
      25                 :             : #ifndef RUST_GCC
      26                 :             : #define RUST_GCC
      27                 :             : 
      28                 :             : #include "rust-location.h"
      29                 :             : 
      30                 :             : // Bvariable is a bit more complicated, because of zero-sized types.
      31                 :             : // The GNU linker does not permit dynamic variables with zero size.
      32                 :             : // When we see such a variable, we generate a version of the type with
      33                 :             : // non-zero size.  However, when referring to the global variable, we
      34                 :             : // want an expression of zero size; otherwise, if, say, the global
      35                 :             : // variable is passed to a function, we will be passing a
      36                 :             : // non-zero-sized value to a zero-sized value, which can lead to a
      37                 :             : // miscompilation.
      38                 :             : 
      39                 :             : class Bvariable
      40                 :             : {
      41                 :             : public:
      42                 :       31259 :   Bvariable (tree t) : t_ (t), orig_type_ (NULL) {}
      43                 :             : 
      44                 :          38 :   Bvariable (tree t, tree orig_type) : t_ (t), orig_type_ (orig_type) {}
      45                 :             : 
      46                 :             :   // Get the tree for use as an expression.
      47                 :             :   tree get_tree (location_t) const;
      48                 :             : 
      49                 :             :   // Get the actual decl;
      50                 :       15706 :   tree get_decl () const { return this->t_; }
      51                 :             : 
      52                 :             :   // Create an error variable.  This is used for cases which should
      53                 :             :   // not occur in a correct program, in order to keep the compilation
      54                 :             :   // going without crashing.
      55                 :             :   static Bvariable *error_variable ();
      56                 :             : 
      57                 :             : private:
      58                 :             :   tree t_;
      59                 :             :   tree orig_type_;
      60                 :             : };
      61                 :             : 
      62                 :             : #endif // RUST_GCC