Add rtl-ssa

This patch adds the RTL SSA infrastructure itself.  The following
fwprop.c patch will make use of it.

gcc/
	* configure.ac: Add rtl-ssa to the list of dependence directories.
	* configure: Regenerate.
	* Makefile.in (rtl-ssa-warn): New variable.
	(OBJS): Add the rtl-ssa object files.
	* emit-rtl.h (rtl_data::ssa): New field.
	* rtl-ssa.h: New file.
	* system.h: Include <functional> when INCLUDE_FUNCTIONAL is defined.
	* rtl-ssa/access-utils.h: Likewise.
	* rtl-ssa/accesses.h: New file.
	* rtl-ssa/accesses.cc: Likewise.
	* rtl-ssa/blocks.h: New file.
	* rtl-ssa/blocks.cc: Likewise.
	* rtl-ssa/change-utils.h: Likewise.
	* rtl-ssa/changes.h: New file.
	* rtl-ssa/changes.cc: Likewise.
	* rtl-ssa/functions.h: New file.
	* rtl-ssa/functions.cc: Likewise.
	* rtl-ssa/insn-utils.h: Likewise.
	* rtl-ssa/insns.h: New file.
	* rtl-ssa/insns.cc: Likewise.
	* rtl-ssa/internals.inl: Likewise.
	* rtl-ssa/is-a.inl: Likewise.
	* rtl-ssa/member-fns.inl: Likewise.
	* rtl-ssa/movement.h: Likewise.

1 files changed, 71 insertions, 0 deletions

diff --git a/gcc/rtl-ssa.h b/gcc/rtl-ssa.h
new file mode 100644
index 0000000..60cdad0
--- /dev/null
+++ b/gcc/rtl-ssa.h
@@ -0,0 +1,71 @@
+// On-the-side RTL SSA representation                               -*- C++ -*-
+// Copyright (C) 2020 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 GCC_RTL_SSA_H
+#define GCC_RTL_SSA_H 1
+
+// This is an aggregation header file.  This means it should contain only
+// other include files.
+
+#if 0
+// Files that use this one should first have:
+#define INCLUDE_ALGORITHM
+#define INCLUDE_FUNCTIONAL
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "backend.h"
+#include "rtl.h"
+#include "df.h"
+#endif
+
+// Needed by splay-tree-utils.h and directly by rtl-ssa.
+#include "pretty-print.h"
+
+// Needed directly by recog.h.
+#include "insn-config.h"
+
+// Needed directly by rtl-ssa.
+#include "splay-tree-utils.h"
+#include "recog.h"
+#include "regs.h"
+#include "function-abi.h"
+#include "obstack-utils.h"
+#include "mux-utils.h"
+#include "rtlanal.h"
+
+// Provides the global crtl->ssa.
+#include "tm_p.h"
+#include "memmodel.h"
+#include "emit-rtl.h"
+
+// The rtl-ssa files themselves.
+#include "rtl-ssa/accesses.h"
+#include "rtl-ssa/insns.h"
+#include "rtl-ssa/blocks.h"
+#include "rtl-ssa/changes.h"
+#include "rtl-ssa/functions.h"
+#include "rtl-ssa/is-a.inl"
+#include "rtl-ssa/access-utils.h"
+#include "rtl-ssa/insn-utils.h"
+#include "rtl-ssa/movement.h"
+#include "rtl-ssa/change-utils.h"
+#include "rtl-ssa/member-fns.inl"
+
+#endif