modula2 front end: gimple interface *[a-d]*.cc

This patchset contains the gimple interface.

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gcc/m2/gm2-gcc/m2assert.cc

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+/* m2assert.cc provides a simple assertion for location.
+
+Copyright (C) 2012-2022 Free Software Foundation, Inc.
+Contributed by Gaius Mulley <gaius@glam.ac.uk>.
+
+This file is part of GNU Modula-2.
+
+GNU Modula-2 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.
+
+GNU Modula-2 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 GNU Modula-2; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "gcc-consolidation.h"
+
+#include "../gm2-lang.h"
+#include "../m2-tree.h"
+
+#define m2assert_c
+#include "m2assert.h"
+#include "m2options.h"
+
+void
+m2assert_AssertLocation (location_t location)
+{
+  /* Internally the compiler will use unknown location and
+     builtins_location so we ignore these values.  */
+  if (location == BUILTINS_LOCATION || location == UNKNOWN_LOCATION)
+    return;
+
+  if (M2Options_OverrideLocation (location) != location)
+    internal_error ("the location value is corrupt");
+}