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/* Generate insn-target-def.h, an automatically-generated part of targetm.
Copyright (C) 1987-2015 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"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "errors.h"
#include "read-md.h"
#include "gensupport.h"
#include "hash-table.h"
/* This class hashes define_insns and define_expands by name. */
struct insn_hasher : nofree_ptr_hash <rtx_def>
{
typedef rtx value_type;
typedef const char *compare_type;
static inline hashval_t hash (rtx);
static inline bool equal (rtx, const char *);
};
hashval_t
insn_hasher::hash (rtx x)
{
return htab_hash_string (XSTR (x, 0));
}
bool
insn_hasher::equal (rtx x, const char *y)
{
return strcmp (XSTR (x, 0), y) == 0;
}
/* All define_insns and define_expands, hashed by name. */
static hash_table <insn_hasher> *insns;
/* Records the prototype suffix X for each invalid_X stub that has been
generated. */
static hash_table <nofree_string_hash> *stubs;
/* Records which C conditions have been wrapped in functions, as a mapping
from the C condition to the function name. */
static hash_map <nofree_string_hash, const char *> *have_funcs;
/* Output hook definitions for pattern NAME, which has target-insns.def
prototype PROTOTYPE. */
static void
def_target_insn (const char *name, const char *prototype)
{
/* Get an upper-case form of NAME. */
unsigned int i;
char *upper_name = XALLOCAVEC (char, strlen (name) + 1);
for (i = 0; name[i]; ++i)
upper_name[i] = TOUPPER (name[i]);
upper_name[i] = 0;
/* Check that the prototype is valid and concatenate the types
together to get a suffix. */
char *suffix = XALLOCAVEC (char, strlen (prototype) + 1);
i = 0;
unsigned int opno = 0;
for (const char *p = prototype; *p; ++p)
if (*p == 'x' && ISDIGIT (p[1]))
{
/* This should be a parameter name of the form "x<OPNO>".
That doesn't contribute to the suffix, so skip ahead and
process the following character. */
char *endptr;
if ((unsigned int) strtol (p + 1, &endptr, 10) != opno
|| (*endptr != ',' && *endptr != ')'))
{
error ("invalid prototype for '%s'", name);
exit (FATAL_EXIT_CODE);
}
opno += 1;
p = endptr;
if (*p == ',')
suffix[i++] = '_';
}
else if (*p == ')' || *p == ',')
{
/* We found the end of a parameter without finding a
parameter name. */
if (strcmp (prototype, "(void)") != 0)
{
error ("argument %d of '%s' did not have the expected name",
opno, name);
exit (FATAL_EXIT_CODE);
}
}
else if (*p != '(' && !ISSPACE (*p))
suffix[i++] = *p;
suffix[i] = 0;
/* See whether we have an implementation of this pattern. */
hashval_t hash = htab_hash_string (name);
int truth = 0;
const char *have_name = name;
if (rtx insn = insns->find_with_hash (name, hash))
{
const char *test = XSTR (insn, 2);
truth = maybe_eval_c_test (test);
gcc_assert (truth != 0);
if (truth < 0)
{
/* Try to reuse an existing function that performs the same test. */
bool existed;
const char *&entry = have_funcs->get_or_insert (test, &existed);
if (!existed)
{
entry = name;
printf ("\nstatic bool\n");
printf ("target_have_%s (void)\n", name);
printf ("{\n");
printf (" return ");
print_c_condition (test);
printf (";\n");
printf ("}\n");
}
have_name = entry;
}
printf ("\nstatic rtx_insn *\n");
printf ("target_gen_%s %s\n", name, prototype);
printf ("{\n");
if (truth < 0)
printf (" gcc_checking_assert (targetm.have_%s ());\n", name);
printf (" return insnify (gen_%s (", name);
for (i = 0; i < opno; ++i)
printf ("%sx%d", i == 0 ? "" : ", ", i);
printf ("));\n");
printf ("}\n");
}
else
{
const char **slot = stubs->find_slot (suffix, INSERT);
if (!*slot)
{
*slot = xstrdup (suffix);
printf ("\nstatic rtx_insn *\n");
printf ("invalid_%s ", suffix);
const char *p = prototype;
while (*p)
{
if (p[0] == 'x' && ISDIGIT (p[1]))
{
char *endptr;
strtol (p + 1, &endptr, 10);
p = endptr;
}
else
fputc (*p++, stdout);
}
printf ("\n{\n");
printf (" gcc_unreachable ();\n");
printf ("}\n");
}
}
printf ("\n#undef TARGET_HAVE_%s\n", upper_name);
printf ("#define TARGET_HAVE_%s ", upper_name);
if (truth == 0)
printf ("hook_bool_void_false\n");
else if (truth == 1)
printf ("hook_bool_void_true\n");
else
printf ("target_have_%s\n", have_name);
printf ("#undef TARGET_GEN_%s\n", upper_name);
printf ("#define TARGET_GEN_%s ", upper_name);
if (truth == 0)
printf ("invalid_%s\n", suffix);
else
printf ("target_gen_%s\n", name);
}
int
main (int argc, char **argv)
{
int insn_code_number = 0;
progname = "gentarget-def";
if (!init_rtx_reader_args (argc, argv))
return (FATAL_EXIT_CODE);
insns = new hash_table <insn_hasher> (31);
stubs = new hash_table <nofree_string_hash> (31);
have_funcs = new hash_map <nofree_string_hash, const char *>;
while (1)
{
int line_no;
rtx desc = read_md_rtx (&line_no, &insn_code_number);
if (desc == NULL)
break;
if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
{
const char *name = XSTR (desc, 0);
if (name[0] != 0 && name[0] != '*')
{
hashval_t hash = htab_hash_string (name);
rtx *slot = insns->find_slot_with_hash (name, hash, INSERT);
if (*slot)
{
message_with_line (line_no, "duplicate definition of '%s'",
name);
have_error = 1;
}
else
*slot = desc;
}
}
}
printf ("/* Generated automatically by the program `gentarget-def'. */\n");
printf ("#ifndef GCC_INSN_TARGET_DEF_H\n");
printf ("#define GCC_INSN_TARGET_DEF_H\n");
/* Output a routine to convert an rtx to an rtx_insn sequence.
??? At some point the gen_* functions themselves should return
rtx_insns. */
printf ("\nstatic inline rtx_insn *\n");
printf ("insnify (rtx x)\n");
printf ("{\n");
printf (" if (!x)\n");
printf (" return NULL;\n");
printf (" if (rtx_insn *insn = dyn_cast <rtx_insn *> (x))\n");
printf (" return insn;\n");
printf (" start_sequence ();\n");
printf (" emit (x);\n");
printf (" rtx_insn *res = get_insns ();\n");
printf (" end_sequence ();\n");
printf (" return res;\n");
printf ("}\n");
#define DEF_TARGET_INSN(INSN, ARGS) \
def_target_insn (#INSN, #ARGS);
#include "target-insns.def"
#undef DEF_TARGET_INSN
printf ("\n#endif /* GCC_INSN_TARGET_DEF_H */\n");
if (have_error || ferror (stdout) || fflush (stdout) || fclose (stdout))
return FATAL_EXIT_CODE;
return SUCCESS_EXIT_CODE;
}
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