97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/* M32C Pragma support
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Copyright (C) 2004, 2007 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "rtl.h"
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#include "toplev.h"
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#include "c-pragma.h"
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#include "cpplib.h"
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#include "hard-reg-set.h"
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#include "output.h"
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#include "m32c-protos.h"
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#include "function.h"
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#define MAX_RECOG_OPERANDS 10
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#include "reload.h"
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#include "target.h"
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/* Implements the "GCC memregs" pragma. This pragma takes only an
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integer, and is semantically identical to the -memregs= command
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line option. The only catch is, the programmer should only use
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this pragma at the beginning of the file (preferably, in some
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project-wide header) to avoid ABI changes related to changing the
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list of available "registers". */
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static void
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m32c_pragma_memregs (cpp_reader * reader ATTRIBUTE_UNUSED)
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{
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/* on off */
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tree val;
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enum cpp_ttype type;
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HOST_WIDE_INT i;
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static char new_number[3];
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type = pragma_lex (&val);
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if (type == CPP_NUMBER)
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{
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if (host_integerp (val, 1))
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{
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i = tree_low_cst (val, 1);
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type = pragma_lex (&val);
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if (type != CPP_EOF)
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warning (0, "junk at end of #pragma GCC memregs [0..16]");
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if (0 <= i && i <= 16)
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{
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if (!ok_to_change_target_memregs)
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{
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warning (0,
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"#pragma GCC memregs must precede any function decls");
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return;
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}
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new_number[0] = (i / 10) + '0';
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new_number[1] = (i % 10) + '0';
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new_number[2] = 0;
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target_memregs = new_number;
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m32c_conditional_register_usage ();
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}
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else
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{
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warning (0, "#pragma GCC memregs takes a number [0..16]");
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}
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return;
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}
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}
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error ("#pragma GCC memregs takes a number [0..16]");
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}
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/* Implements REGISTER_TARGET_PRAGMAS. */
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void
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m32c_register_pragmas (void)
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{
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c_register_pragma ("GCC", "memregs", m32c_pragma_memregs);
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}
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