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/* Generate code to allocate RTL structures.
Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2007
Free Software Foundation, 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 "bconfig.h"
#include "system.h"
struct rtx_definition
{
const char *const enumname, *const name, *const format;
};
/* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what
CONST_DOUBLE_FORMAT is because we're not going to be generating
anything for CONST_DOUBLE anyway. */
#define CONST_DOUBLE_FORMAT ""
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT },
static const struct rtx_definition defs[] =
{
#include "rtl.def" /* rtl expressions are documented here */
};
#define NUM_RTX_CODE ARRAY_SIZE(defs)
static const char *formats[NUM_RTX_CODE];
static const char *type_from_format (int);
static const char *accessor_from_format (int);
static int special_format (const char *);
static int special_rtx (int);
static int excluded_rtx (int);
static void find_formats (void);
static void gendecl (const char *);
static void genmacro (int);
static void gendef (const char *);
static void genlegend (void);
static void genheader (void);
static void gencode (void);
/* Decode a format letter into a C type string. */
static const char *
type_from_format (int c)
{
switch (c)
{
case 'i':
return "int ";
case 'w':
return "HOST_WIDE_INT ";
case 's':
return "const char *";
case 'e': case 'u':
return "rtx ";
case 'E':
return "rtvec ";
case 'b':
return "struct bitmap_head_def *"; /* bitmap - typedef not available */
case 't':
return "union tree_node *"; /* tree - typedef not available */
case 'B':
return "struct basic_block_def *"; /* basic block - typedef not available */
default:
gcc_unreachable ();
}
}
/* Decode a format letter into the proper accessor function. */
static const char *
accessor_from_format (int c)
{
switch (c)
{
case 'i':
return "XINT";
case 'w':
return "XWINT";
case 's':
return "XSTR";
case 'e': case 'u':
return "XEXP";
case 'E':
return "XVEC";
case 'b':
return "XBITMAP";
case 't':
return "XTREE";
case 'B':
return "XBBDEF";
default:
gcc_unreachable ();
}
}
/* Return nonzero if we should ignore FMT, an RTL format, when making
the list of formats we write routines to create. */
static int
special_format (const char *fmt)
{
return (strchr (fmt, '*') != 0
|| strchr (fmt, 'V') != 0
|| strchr (fmt, 'S') != 0
|| strchr (fmt, 'n') != 0);
}
/* Return nonzero if the RTL code given by index IDX is one that we should
generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
is a wrapper in emit-rtl.c). */
static int
special_rtx (int idx)
{
return (strcmp (defs[idx].enumname, "CONST_INT") == 0
|| strcmp (defs[idx].enumname, "REG") == 0
|| strcmp (defs[idx].enumname, "SUBREG") == 0
|| strcmp (defs[idx].enumname, "MEM") == 0
|| strcmp (defs[idx].enumname, "CONST_VECTOR") == 0);
}
/* Return nonzero if the RTL code given by index IDX is one that we should
generate no macro for at all (because gen_rtx_FOO is never used or
cannot have the obvious interface). */
static int
excluded_rtx (int idx)
{
return ((strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0)
|| (strcmp (defs[idx].enumname, "CONST_FIXED") == 0));
}
/* Place a list of all format specifiers we use into the array FORMAT. */
static void
find_formats (void)
{
unsigned int i;
for (i = 0; i < NUM_RTX_CODE; i++)
{
const char **f;
if (special_format (defs[i].format))
continue;
for (f = formats; *f; f++)
if (! strcmp (*f, defs[i].format))
break;
if (*f == 0)
*f = defs[i].format;
}
}
/* Write the declarations for the routine to allocate RTL with FORMAT. */
static void
gendecl (const char *format)
{
const char *p;
int i, pos;
printf ("extern rtx gen_rtx_fmt_%s_stat\t (RTX_CODE, ", format);
printf ("enum machine_mode mode");
/* Write each parameter that is needed and start a new line when the line
would overflow. */
for (p = format, i = 0, pos = 75; *p != 0; p++)
if (*p != '0')
{
int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9);
printf (",");
if (pos + ourlen > 76)
printf ("\n\t\t\t\t "), pos = 39;
printf (" %sarg%d", type_from_format (*p), i++);
pos += ourlen;
}
printf (" MEM_STAT_DECL");
printf (");\n");
printf ("#define gen_rtx_fmt_%s(c, m", format);
for (p = format, i = 0; *p != 0; p++)
if (*p != '0')
printf (", p%i",i++);
printf (")\\\n gen_rtx_fmt_%s_stat (c, m", format);
for (p = format, i = 0; *p != 0; p++)
if (*p != '0')
printf (", p%i",i++);
printf (" MEM_STAT_INFO)\n\n");
}
/* Generate macros to generate RTL of code IDX using the functions we
write. */
static void
genmacro (int idx)
{
const char *p;
int i;
/* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
if (excluded_rtx (idx))
/* Don't define a macro for this code. */
return;
printf ("#define gen_rtx_%s%s(MODE",
special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
for (p = defs[idx].format, i = 0; *p != 0; p++)
if (*p != '0')
printf (", ARG%d", i++);
printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
defs[idx].format, defs[idx].enumname);
for (p = defs[idx].format, i = 0; *p != 0; p++)
if (*p != '0')
printf (", (ARG%d)", i++);
puts (")");
}
/* Generate the code for the function to generate RTL whose
format is FORMAT. */
static void
gendef (const char *format)
{
const char *p;
int i, j;
/* Start by writing the definition of the function name and the types
of the arguments. */
printf ("rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, enum machine_mode mode", format);
for (p = format, i = 0; *p != 0; p++)
if (*p != '0')
printf (",\n\t%sarg%d", type_from_format (*p), i++);
puts (" MEM_STAT_DECL)");
/* Now write out the body of the function itself, which allocates
the memory and initializes it. */
puts ("{");
puts (" rtx rt;");
puts (" rt = rtx_alloc_stat (code PASS_MEM_STAT);\n");
puts (" PUT_MODE (rt, mode);");
for (p = format, i = j = 0; *p ; ++p, ++i)
if (*p != '0')
printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
else
printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
puts ("\n return rt;\n}\n");
}
/* Generate the documentation header for files we write. */
static void
genlegend (void)
{
puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
}
/* Generate the text of the header file we make, genrtl.h. */
static void
genheader (void)
{
unsigned int i;
const char **fmt;
puts ("#ifndef GCC_GENRTL_H");
puts ("#define GCC_GENRTL_H\n");
puts ("#include \"statistics.h\"\n");
for (fmt = formats; *fmt; ++fmt)
gendecl (*fmt);
putchar ('\n');
for (i = 0; i < NUM_RTX_CODE; i++)
if (! special_format (defs[i].format))
genmacro (i);
puts ("\n#endif /* GCC_GENRTL_H */");
}
/* Generate the text of the code file we write, genrtl.c. */
static void
gencode (void)
{
const char **fmt;
puts ("#include \"config.h\"");
puts ("#include \"system.h\"");
puts ("#include \"coretypes.h\"");
puts ("#include \"tm.h\"");
puts ("#include \"obstack.h\"");
puts ("#include \"rtl.h\"");
puts ("#include \"ggc.h\"\n");
for (fmt = formats; *fmt != 0; fmt++)
gendef (*fmt);
}
/* This is the main program. We accept only one argument, "-h", which
says we are writing the genrtl.h file. Otherwise we are writing the
genrtl.c file. */
int
main (int argc, char **argv)
{
find_formats ();
genlegend ();
if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
genheader ();
else
gencode ();
if (ferror (stdout) || fflush (stdout) || fclose (stdout))
return FATAL_EXIT_CODE;
return SUCCESS_EXIT_CODE;
}
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