gccrs: Add HIR to GCC GENERIC lowering for all nodes

This patch implements the lowering mentioned in the previous patch for all HIR nodes.

	gcc/rust/
	* backend/rust-compile-block.cc: New.
	* backend/rust-compile-block.h: New.
	* backend/rust-compile-expr.cc: New.
	* backend/rust-compile-expr.h: New.
	* backend/rust-compile-extern.h: New.
	* backend/rust-compile-fnparam.cc: New.
	* backend/rust-compile-fnparam.h: New.
	* backend/rust-compile-implitem.cc: New.
	* backend/rust-compile-implitem.h: New.
	* backend/rust-compile-intrinsic.cc: New.
	* backend/rust-compile-intrinsic.h: New.
	* backend/rust-compile-item.cc: New.
	* backend/rust-compile-item.h: New.
	* backend/rust-compile-pattern.cc: New.
	* backend/rust-compile-pattern.h: New.
	* backend/rust-compile-resolve-path.cc: New.
	* backend/rust-compile-resolve-path.h: New.
	* backend/rust-compile-stmt.cc: New.
	* backend/rust-compile-stmt.h: New.
	* backend/rust-compile-struct-field-expr.cc: New.
	* backend/rust-compile-struct-field-expr.h: New.
	* backend/rust-compile-type.cc: New.
	* backend/rust-compile-type.h: New.
	* backend/rust-compile-var-decl.h: New.

Co-authored-by: David Faust <david.faust@oracle.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/gcc/rust/backend/rust-compile-fnparam.h b/gcc/rust/backend/rust-compile-fnparam.h
new file mode 100644
index 0000000..0dbbd99
--- /dev/null
+++ b/gcc/rust/backend/rust-compile-fnparam.h
@@ -0,0 +1,70 @@
+// Copyright (C) 2020-2022 Free Software Foundation, Inc.
+
+// 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/>.
+
+#ifndef RUST_COMPILE_FNPARAM
+#define RUST_COMPILE_FNPARAM
+
+#include "rust-compile-base.h"
+
+namespace Rust {
+namespace Compile {
+
+class CompileFnParam : private HIRCompileBase, protected HIR::HIRPatternVisitor
+{
+public:
+  static Bvariable *compile (Context *ctx, tree fndecl,
+			     HIR::FunctionParam *param, tree decl_type,
+			     Location locus);
+  static Bvariable *compile (Context *ctx, tree fndecl, HIR::Pattern *param,
+			     tree decl_type, Location locus);
+
+  void visit (HIR::IdentifierPattern &pattern) override;
+  void visit (HIR::WildcardPattern &pattern) override;
+  void visit (HIR::StructPattern &) override;
+  void visit (HIR::TupleStructPattern &) override;
+
+  // Empty visit for unused Pattern HIR nodes.
+  void visit (HIR::GroupedPattern &) override {}
+  void visit (HIR::LiteralPattern &) override {}
+  void visit (HIR::PathInExpression &) override {}
+  void visit (HIR::QualifiedPathInExpression &) override {}
+  void visit (HIR::RangePattern &) override {}
+  void visit (HIR::ReferencePattern &) override {}
+  void visit (HIR::SlicePattern &) override {}
+  void visit (HIR::TuplePattern &) override {}
+
+private:
+  CompileFnParam (Context *ctx, tree fndecl, tree decl_type, Location locus);
+
+  tree fndecl;
+  tree decl_type;
+  Location locus;
+  Bvariable *compiled_param;
+};
+
+class CompileSelfParam : private HIRCompileBase
+{
+public:
+  static Bvariable *compile (Context *ctx, tree fndecl, HIR::SelfParam &self,
+			     tree decl_type, Location locus);
+};
+
+} // namespace Compile
+} // namespace Rust
+
+#endif // RUST_COMPILE_FNPARAM