From 86743891a6e9eb6a927dc0201c0306a98ec8ebad Mon Sep 17 00:00:00 2001 From: Arthur Cohen Date: Wed, 24 Aug 2022 17:20:57 +0200 Subject: gccrs: backend: Expose Bvariable class through rust-gcc header gcc/rust/ChangeLog: * rust-gcc.cc (class Bvariable): Move class to `rust-gcc.h` header. * rust-gcc.h: New file. --- gcc/rust/rust-gcc.h | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 gcc/rust/rust-gcc.h (limited to 'gcc/rust/rust-gcc.h') diff --git a/gcc/rust/rust-gcc.h b/gcc/rust/rust-gcc.h new file mode 100644 index 0000000..085c16d --- /dev/null +++ b/gcc/rust/rust-gcc.h @@ -0,0 +1,58 @@ +// rust-gcc.cc -- Rust frontend to gcc IR. +// Copyright (C) 2011-2022 Free Software Foundation, Inc. +// Contributed by Ian Lance Taylor, Google. +// forked from gccgo + +// This file is part of GCC. + +// GCC is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 3, or (at your option) any later +// version. + +// GCC is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. + +// You should have received a copy of the GNU General Public License +// along with GCC; see the file COPYING3. If not see +// . + +#include "rust-system.h" + +// This has to be included outside of extern "C", so we have to +// include it here before tree.h includes it later. +#include + +#include "tree.h" +#include "rust-location.h" + +// TODO: this will have to be significantly modified to work with Rust + +// Bvariable is a bit more complicated, because of zero-sized types. +// The GNU linker does not permit dynamic variables with zero size. +// When we see such a variable, we generate a version of the type with +// non-zero size. However, when referring to the global variable, we +// want an expression of zero size; otherwise, if, say, the global +// variable is passed to a function, we will be passing a +// non-zero-sized value to a zero-sized value, which can lead to a +// miscompilation. + +class Bvariable +{ +public: + Bvariable (tree t) : t_ (t), orig_type_ (NULL) {} + + Bvariable (tree t, tree orig_type) : t_ (t), orig_type_ (orig_type) {} + + // Get the tree for use as an expression. + tree get_tree (Location) const; + + // Get the actual decl; + tree get_decl () const { return this->t_; } + +private: + tree t_; + tree orig_type_; +}; -- cgit v1.1