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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [config/] [m32c/] [m32c-pragma.c] - Rev 527
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/* 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); }
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