Imported gcc-4.4.3

[msp430-gcc.git] / gcc / config / m32c / m32c-pragma.c

diff --git a/gcc/config/m32c/m32c-pragma.c b/gcc/config/m32c/m32c-pragma.c
new file mode 100644 (file)
index 0000000..4e30937
--- /dev/null
+++ b/gcc/config/m32c/m32c-pragma.c
@@ -0,0 +1,96 @@
+/* M32C Pragma support
+   Copyright (C) 2004, 2007 Free Software Foundation, Inc.
+   Contributed by Red Hat, 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/>.  */
+
+#include <stdio.h>
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "rtl.h"
+#include "toplev.h"
+#include "c-pragma.h"
+#include "cpplib.h"
+#include "hard-reg-set.h"
+#include "output.h"
+#include "m32c-protos.h"
+#include "function.h"
+#define MAX_RECOG_OPERANDS 10
+#include "reload.h"
+#include "target.h"
+
+/* Implements the "GCC memregs" pragma.  This pragma takes only an
+   integer, and is semantically identical to the -memregs= command
+   line option.  The only catch is, the programmer should only use
+   this pragma at the beginning of the file (preferably, in some
+   project-wide header) to avoid ABI changes related to changing the
+   list of available "registers".  */
+static void
+m32c_pragma_memregs (cpp_reader * reader ATTRIBUTE_UNUSED)
+{
+  /* on off */
+  tree val;
+  enum cpp_ttype type;
+  HOST_WIDE_INT i;
+  static char new_number[3];
+
+  type = pragma_lex (&val);
+  if (type == CPP_NUMBER)
+    {
+      if (host_integerp (val, 1))
+       {
+         i = tree_low_cst (val, 1);
+
+         type = pragma_lex (&val);
+         if (type != CPP_EOF)
+           warning (0, "junk at end of #pragma GCC memregs [0..16]");
+
+         if (0 <= i && i <= 16)
+           {
+             if (!ok_to_change_target_memregs)
+               {
+                 warning (0,
+                          "#pragma GCC memregs must precede any function decls");
+                 return;
+               }
+             new_number[0] = (i / 10) + '0';
+             new_number[1] = (i % 10) + '0';
+             new_number[2] = 0;
+             target_memregs = new_number;
+             m32c_conditional_register_usage ();
+           }
+         else
+           {
+             warning (0, "#pragma GCC memregs takes a number [0..16]");
+           }
+
+         return;
+       }
+    }
+
+  error ("#pragma GCC memregs takes a number [0..16]");
+}
+
+/* Implements REGISTER_TARGET_PRAGMAS.  */
+void
+m32c_register_pragmas (void)
+{
+  c_register_pragma ("GCC", "memregs", m32c_pragma_memregs);
+}