314 lines
6.5 KiB
C
314 lines
6.5 KiB
C
/* Generate code to allocate RTL structures.
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Copyright (C) 1997 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC 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 2, or (at your option)
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any later version.
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GNU CC 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 GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "hconfig.h"
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#include <stdio.h>
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#include "obstack.h"
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free free
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#define NO_GENRTL_H
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#include "rtl.h"
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struct rtx_definition
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{
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const char *enumname, *name, *format;
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};
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#if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
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#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { # ENUM, NAME, FORMAT },
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#else
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#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { "ENUM", NAME, FORMAT },
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#endif
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struct rtx_definition defs[] =
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{
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#include "rtl.def" /* rtl expressions are documented here */
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};
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const char *formats[NUM_RTX_CODE];
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static const char *
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type_from_format (c)
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char c;
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{
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switch (c)
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{
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case 'i':
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return "int";
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case 'w':
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return "HOST_WIDE_INT";
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case 's':
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return "char *";
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case 'e':
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case 'u':
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return "rtx";
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case 'E':
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return "rtvec";
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default:
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abort ();
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}
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}
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static const char *
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accessor_from_format (c)
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char c;
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{
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switch (c)
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{
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case 'i':
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return "XINT";
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case 'w':
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return "XWINT";
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case 's':
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return "XSTR";
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case 'e':
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case 'u':
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return "XEXP";
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case 'E':
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return "XVEC";
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default:
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abort ();
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}
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}
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static int
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special_format (fmt)
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const char *fmt;
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{
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return (strchr (fmt, '*') != 0
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|| strchr (fmt, 'V') != 0
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|| strchr (fmt, 'S') != 0
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|| strchr (fmt, 'n') != 0);
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}
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static int
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special_rtx (idx)
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int idx;
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{
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return (strcmp (defs[idx].enumname, "CONST_INT") == 0
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|| strcmp (defs[idx].enumname, "REG") == 0);
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}
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static void
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find_formats ()
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{
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int i;
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for (i = 0; i < NUM_RTX_CODE; ++i)
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{
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const char **f;
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if (special_format (defs[i].format))
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continue;
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for (f = formats; *f ; ++f)
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if (!strcmp(*f, defs[i].format))
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break;
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if (!*f)
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*f = defs[i].format;
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}
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}
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static void
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gendecl (f, format)
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FILE *f;
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const char *format;
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{
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const char *p;
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int i;
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fprintf (f, "extern rtx gen_rtx_fmt_%s PROTO((RTX_CODE, enum machine_mode mode",
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format);
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for (p = format, i = 0; *p ; ++p)
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if (*p != '0')
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fprintf (f, ", %s arg%d", type_from_format (*p), i++);
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fprintf (f, "));\n");
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}
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static void
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genmacro (f, idx)
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FILE *f;
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int idx;
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{
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const char *p;
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int i;
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fprintf (f, "#define gen_rtx_%s%s(mode",
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(special_rtx (idx) ? "raw_" : ""), defs[idx].enumname);
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for (p = defs[idx].format, i = 0; *p ; ++p)
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if (*p != '0')
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fprintf (f, ", arg%d", i++);
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fprintf (f, ") ");
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fprintf (f, "gen_rtx_fmt_%s(%s,(mode)", defs[idx].format, defs[idx].enumname);
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for (p = defs[idx].format, i = 0; *p ; ++p)
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if (*p != '0')
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fprintf (f, ",(arg%d)", i++);
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fprintf (f, ")\n");
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}
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static void
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gendef (f, format)
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FILE *f;
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const char *format;
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{
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const char *p;
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int i, j;
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fprintf (f, "rtx\ngen_rtx_fmt_%s (code, mode", format);
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for (p = format, i = 0; *p ; ++p)
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if (*p != '0')
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fprintf (f, ", arg%d", i++);
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fprintf (f, ")\n RTX_CODE code;\n enum machine_mode mode;\n");
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for (p = format, i = 0; *p ; ++p)
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if (*p != '0')
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fprintf (f, " %s arg%d;\n", type_from_format (*p), i++);
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/* See rtx_alloc in rtl.c for comments. */
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fprintf (f, "{\n");
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fprintf (f, " rtx rt = obstack_alloc_rtx (sizeof (struct rtx_def) + %d * sizeof (rtunion));\n",
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(int) strlen (format) - 1);
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fprintf (f, " PUT_CODE (rt, code);\n");
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fprintf (f, " PUT_MODE (rt, mode);\n");
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for (p = format, i = j = 0; *p ; ++p, ++i)
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if (*p != '0')
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{
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fprintf (f, " %s (rt, %d) = arg%d;\n",
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accessor_from_format (*p), i, j++);
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}
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fprintf (f, "\n return rt;\n}\n\n");
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}
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static void
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genlegend (f)
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FILE *f;
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{
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fprintf (f, "/* Generated automaticaly by the program `gengenrtl'\n");
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fprintf (f, " from the RTL description file `rtl.def' */\n\n");
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}
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static void
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genheader (f)
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FILE *f;
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{
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int i;
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const char **fmt;
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for (fmt = formats; *fmt; ++fmt)
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gendecl (f, *fmt);
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fprintf(f, "\n");
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for (i = 0; i < NUM_RTX_CODE; i++)
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{
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if (special_format (defs[i].format))
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continue;
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genmacro (f, i);
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}
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}
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static void
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gencode (f)
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FILE *f;
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{
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const char **fmt;
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fputs ("#include \"config.h\"\n", f);
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fputs ("#include \"obstack.h\"\n", f);
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fputs ("#include \"rtl.h\"\n\n", f);
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fputs ("extern struct obstack *rtl_obstack;\n\n", f);
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fputs ("static rtx obstack_alloc_rtx PROTO((int length));\n", f);
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fputs ("static rtx obstack_alloc_rtx (length)\n", f);
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fputs (" register int length;\n{\n", f);
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fputs (" rtx rt = (rtx) obstack_alloc (rtl_obstack, length);\n\n", f);
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fputs (" if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(int))\n", f);
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fputs (" *(int *)rt = 0;\n", f);
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fputs (" else if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(HOST_WIDE_INT))\n", f);
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fputs (" *(HOST_WIDE_INT *)rt = 0;\n", f);
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fputs (" else\n", f);
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fputs (" bzero(rt, sizeof(struct rtx_def) - sizeof(rtunion));\n\n", f);
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fputs (" return rt;\n}\n\n", f);
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for (fmt = formats; *fmt; ++fmt)
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gendef (f, *fmt);
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}
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#if defined(USE_C_ALLOCA) && !defined(__GNUC__)
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char *
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xmalloc (nbytes)
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int nbytes;
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{
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char *tmp = (char *) malloc (nbytes);
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if (!tmp)
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{
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fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n", nbytes);
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exit (FATAL_EXIT_CODE);
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}
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return tmp;
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}
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#endif /* USE_C_ALLOCA && !__GNUC__ */
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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FILE *f;
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if (argc != 3)
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exit (1);
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find_formats ();
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f = fopen (argv[1], "w");
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if (f == NULL)
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{
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perror(argv[1]);
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exit (1);
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}
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genlegend (f);
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genheader (f);
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fclose(f);
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f = fopen (argv[2], "w");
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if (f == NULL)
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{
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perror(argv[2]);
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exit (1);
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}
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genlegend (f);
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gencode (f);
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fclose(f);
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exit (0);
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}
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