--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/align.h	Thu Oct 25 10:21:07 2018 +0900
@@ -0,0 +1,82 @@
+/* Alignment-related classes.
+   Copyright (C) 2018 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/>.  */
+
+/* Align flags tuple with alignment in log form and with a maximum skip.  */
+
+struct align_flags_tuple
+{
+  /* Values of the -falign-* flags: how much to align labels in code.
+     log is "align to 2^log" (so 0 means no alignment).
+     maxskip is the maximum allowed amount of padding to insert.  */
+  int log;
+  int maxskip;
+
+  /* Normalize filled values so that maxskip is not bigger than 1 << log.  */
+  void normalize ()
+  {
+    int n = (1 << log);
+    if (maxskip > n)
+      maxskip = n - 1;
+  }
+
+  /* Return original value of an alignment flag.  */
+  int get_value ()
+  {
+    return maxskip + 1;
+  }
+};
+
+/* Alignment flags is structure used as value of -align-* options.
+   It's used in target-dependant code.  */
+
+struct align_flags
+{
+  /* Default constructor.  */
+  align_flags (int log0 = 0, int maxskip0 = 0, int log1 = 0, int maxskip1 = 0)
+  {
+    levels[0].log = log0;
+    levels[0].maxskip = maxskip0;
+    levels[1].log = log1;
+    levels[1].maxskip = maxskip1;
+    normalize ();
+  }
+
+  /* Normalize both components of align_flags.  */
+  void normalize ()
+  {
+    for (unsigned i = 0; i < 2; i++)
+      levels[i].normalize ();
+  }
+
+  /* Get alignment that is common bigger alignment of alignments F0 and F1.  */
+  static align_flags max (const align_flags f0, const align_flags f1)
+    {
+      int log0 = MAX (f0.levels[0].log, f1.levels[0].log);
+      int maxskip0 = MAX (f0.levels[0].maxskip, f1.levels[0].maxskip);
+      int log1 = MAX (f0.levels[1].log, f1.levels[1].log);
+      int maxskip1 = MAX (f0.levels[1].maxskip, f1.levels[1].maxskip);
+      return align_flags (log0, maxskip0, log1, maxskip1);
+    }
+
+  align_flags_tuple levels[2];
+};
+
+/* Define maximum supported code alignment.  */
+#define MAX_CODE_ALIGN 16
+#define MAX_CODE_ALIGN_VALUE (1 << MAX_CODE_ALIGN)