Merge from trunk revision aa8f4242efc99f24de73c59d53996f28db28c13f.

1 files changed, 58 insertions, 0 deletions

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
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+// 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
+// <http://www.gnu.org/licenses/>.
+
+#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 <gmp.h>
+
+#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_;
+};