a4cd5630b0
non-i386, non-unix, and generatable files have been trimmed, but can easily be added in later if needed. gcc-2.7.2.1 will follow shortly, it's a very small delta to this and it's handy to have both available for reference for such little cost. The freebsd-specific changes will then be committed, and once the dust has settled, the bmakefiles will be committed to use this code.
801 lines
21 KiB
C
801 lines
21 KiB
C
/* Generate code from machine description to emit insns as rtl.
|
||
Copyright (C) 1987, 1988, 1991, 1994, 1995 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU CC.
|
||
|
||
GNU CC 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 2, or (at your option)
|
||
any later version.
|
||
|
||
GNU CC 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 GNU CC; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
|
||
#include <stdio.h>
|
||
#include "hconfig.h"
|
||
#include "rtl.h"
|
||
#include "obstack.h"
|
||
|
||
static struct obstack obstack;
|
||
struct obstack *rtl_obstack = &obstack;
|
||
|
||
#define obstack_chunk_alloc xmalloc
|
||
#define obstack_chunk_free free
|
||
|
||
extern void free ();
|
||
extern rtx read_rtx ();
|
||
|
||
char *xmalloc ();
|
||
static void fatal ();
|
||
void fancy_abort ();
|
||
|
||
static int max_opno;
|
||
static int max_dup_opno;
|
||
static int register_constraints;
|
||
static int insn_code_number;
|
||
static int insn_index_number;
|
||
|
||
/* Data structure for recording the patterns of insns that have CLOBBERs.
|
||
We use this to output a function that adds these CLOBBERs to a
|
||
previously-allocated PARALLEL expression. */
|
||
|
||
struct clobber_pat
|
||
{
|
||
struct clobber_ent *insns;
|
||
rtx pattern;
|
||
int first_clobber;
|
||
struct clobber_pat *next;
|
||
} *clobber_list;
|
||
|
||
/* Records one insn that uses the clobber list. */
|
||
|
||
struct clobber_ent
|
||
{
|
||
int code_number; /* Counts only insns. */
|
||
struct clobber_ent *next;
|
||
};
|
||
|
||
static void
|
||
max_operand_1 (x)
|
||
rtx x;
|
||
{
|
||
register RTX_CODE code;
|
||
register int i;
|
||
register int len;
|
||
register char *fmt;
|
||
|
||
if (x == 0)
|
||
return;
|
||
|
||
code = GET_CODE (x);
|
||
|
||
if (code == MATCH_OPERAND && XSTR (x, 2) != 0 && *XSTR (x, 2) != '\0')
|
||
register_constraints = 1;
|
||
if (code == MATCH_SCRATCH && XSTR (x, 1) != 0 && *XSTR (x, 1) != '\0')
|
||
register_constraints = 1;
|
||
if (code == MATCH_OPERAND || code == MATCH_OPERATOR
|
||
|| code == MATCH_PARALLEL)
|
||
max_opno = MAX (max_opno, XINT (x, 0));
|
||
if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP)
|
||
max_dup_opno = MAX (max_dup_opno, XINT (x, 0));
|
||
|
||
fmt = GET_RTX_FORMAT (code);
|
||
len = GET_RTX_LENGTH (code);
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
if (fmt[i] == 'e' || fmt[i] == 'u')
|
||
max_operand_1 (XEXP (x, i));
|
||
else if (fmt[i] == 'E')
|
||
{
|
||
int j;
|
||
for (j = 0; j < XVECLEN (x, i); j++)
|
||
max_operand_1 (XVECEXP (x, i, j));
|
||
}
|
||
}
|
||
}
|
||
|
||
static int
|
||
max_operand_vec (insn, arg)
|
||
rtx insn;
|
||
int arg;
|
||
{
|
||
register int len = XVECLEN (insn, arg);
|
||
register int i;
|
||
|
||
max_opno = -1;
|
||
max_dup_opno = -1;
|
||
|
||
for (i = 0; i < len; i++)
|
||
max_operand_1 (XVECEXP (insn, arg, i));
|
||
|
||
return max_opno + 1;
|
||
}
|
||
|
||
static void
|
||
print_code (code)
|
||
RTX_CODE code;
|
||
{
|
||
register char *p1;
|
||
for (p1 = GET_RTX_NAME (code); *p1; p1++)
|
||
{
|
||
if (*p1 >= 'a' && *p1 <= 'z')
|
||
putchar (*p1 + 'A' - 'a');
|
||
else
|
||
putchar (*p1);
|
||
}
|
||
}
|
||
|
||
/* Print a C expression to construct an RTX just like X,
|
||
substituting any operand references appearing within. */
|
||
|
||
static void
|
||
gen_exp (x)
|
||
rtx x;
|
||
{
|
||
register RTX_CODE code;
|
||
register int i;
|
||
register int len;
|
||
register char *fmt;
|
||
|
||
if (x == 0)
|
||
{
|
||
printf ("NULL_RTX");
|
||
return;
|
||
}
|
||
|
||
code = GET_CODE (x);
|
||
|
||
switch (code)
|
||
{
|
||
case MATCH_OPERAND:
|
||
case MATCH_DUP:
|
||
printf ("operand%d", XINT (x, 0));
|
||
return;
|
||
|
||
case MATCH_OP_DUP:
|
||
printf ("gen_rtx (GET_CODE (operand%d), GET_MODE (operand%d)",
|
||
XINT (x, 0), XINT (x, 0));
|
||
for (i = 0; i < XVECLEN (x, 1); i++)
|
||
{
|
||
printf (",\n\t\t");
|
||
gen_exp (XVECEXP (x, 1, i));
|
||
}
|
||
printf (")");
|
||
return;
|
||
|
||
case MATCH_OPERATOR:
|
||
printf ("gen_rtx (GET_CODE (operand%d)", XINT (x, 0));
|
||
printf (", %smode", GET_MODE_NAME (GET_MODE (x)));
|
||
for (i = 0; i < XVECLEN (x, 2); i++)
|
||
{
|
||
printf (",\n\t\t");
|
||
gen_exp (XVECEXP (x, 2, i));
|
||
}
|
||
printf (")");
|
||
return;
|
||
|
||
case MATCH_PARALLEL:
|
||
case MATCH_PAR_DUP:
|
||
printf ("operand%d", XINT (x, 0));
|
||
return;
|
||
|
||
case MATCH_SCRATCH:
|
||
printf ("gen_rtx (SCRATCH, %smode, 0)", GET_MODE_NAME (GET_MODE (x)));
|
||
return;
|
||
|
||
case ADDRESS:
|
||
fatal ("ADDRESS expression code used in named instruction pattern");
|
||
|
||
case PC:
|
||
printf ("pc_rtx");
|
||
return;
|
||
|
||
case CC0:
|
||
printf ("cc0_rtx");
|
||
return;
|
||
|
||
case CONST_INT:
|
||
if (INTVAL (x) == 0)
|
||
printf ("const0_rtx");
|
||
else if (INTVAL (x) == 1)
|
||
printf ("const1_rtx");
|
||
else if (INTVAL (x) == -1)
|
||
printf ("constm1_rtx");
|
||
else if (INTVAL (x) == STORE_FLAG_VALUE)
|
||
printf ("const_true_rtx");
|
||
else
|
||
printf (
|
||
#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
|
||
"GEN_INT (%d)",
|
||
#else
|
||
"GEN_INT (%ld)",
|
||
#endif
|
||
INTVAL (x));
|
||
return;
|
||
|
||
case CONST_DOUBLE:
|
||
/* These shouldn't be written in MD files. Instead, the appropriate
|
||
routines in varasm.c should be called. */
|
||
abort ();
|
||
}
|
||
|
||
printf ("gen_rtx (");
|
||
print_code (code);
|
||
printf (", %smode", GET_MODE_NAME (GET_MODE (x)));
|
||
|
||
fmt = GET_RTX_FORMAT (code);
|
||
len = GET_RTX_LENGTH (code);
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
if (fmt[i] == '0')
|
||
break;
|
||
printf (",\n\t");
|
||
if (fmt[i] == 'e' || fmt[i] == 'u')
|
||
gen_exp (XEXP (x, i));
|
||
else if (fmt[i] == 'i')
|
||
printf ("%u", XINT (x, i));
|
||
else if (fmt[i] == 's')
|
||
printf ("\"%s\"", XSTR (x, i));
|
||
else if (fmt[i] == 'E')
|
||
{
|
||
int j;
|
||
printf ("gen_rtvec (%d", XVECLEN (x, i));
|
||
for (j = 0; j < XVECLEN (x, i); j++)
|
||
{
|
||
printf (",\n\t\t");
|
||
gen_exp (XVECEXP (x, i, j));
|
||
}
|
||
printf (")");
|
||
}
|
||
else
|
||
abort ();
|
||
}
|
||
printf (")");
|
||
}
|
||
|
||
/* Generate the `gen_...' function for a DEFINE_INSN. */
|
||
|
||
static void
|
||
gen_insn (insn)
|
||
rtx insn;
|
||
{
|
||
int operands;
|
||
register int i;
|
||
|
||
/* See if the pattern for this insn ends with a group of CLOBBERs of (hard)
|
||
registers or MATCH_SCRATCHes. If so, store away the information for
|
||
later. */
|
||
|
||
if (XVEC (insn, 1))
|
||
{
|
||
for (i = XVECLEN (insn, 1) - 1; i > 0; i--)
|
||
if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER
|
||
|| (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != REG
|
||
&& GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH))
|
||
break;
|
||
|
||
if (i != XVECLEN (insn, 1) - 1)
|
||
{
|
||
register struct clobber_pat *p;
|
||
register struct clobber_ent *link
|
||
= (struct clobber_ent *) xmalloc (sizeof (struct clobber_ent));
|
||
register int j;
|
||
|
||
link->code_number = insn_code_number;
|
||
|
||
/* See if any previous CLOBBER_LIST entry is the same as this
|
||
one. */
|
||
|
||
for (p = clobber_list; p; p = p->next)
|
||
{
|
||
if (p->first_clobber != i + 1
|
||
|| XVECLEN (p->pattern, 1) != XVECLEN (insn, 1))
|
||
continue;
|
||
|
||
for (j = i + 1; j < XVECLEN (insn, 1); j++)
|
||
{
|
||
rtx old = XEXP (XVECEXP (p->pattern, 1, j), 0);
|
||
rtx new = XEXP (XVECEXP (insn, 1, j), 0);
|
||
|
||
/* OLD and NEW are the same if both are to be a SCRATCH
|
||
of the same mode,
|
||
or if both are registers of the same mode and number. */
|
||
if (! (GET_MODE (old) == GET_MODE (new)
|
||
&& ((GET_CODE (old) == MATCH_SCRATCH
|
||
&& GET_CODE (new) == MATCH_SCRATCH)
|
||
|| (GET_CODE (old) == REG && GET_CODE (new) == REG
|
||
&& REGNO (old) == REGNO (new)))))
|
||
break;
|
||
}
|
||
|
||
if (j == XVECLEN (insn, 1))
|
||
break;
|
||
}
|
||
|
||
if (p == 0)
|
||
{
|
||
p = (struct clobber_pat *) xmalloc (sizeof (struct clobber_pat));
|
||
|
||
p->insns = 0;
|
||
p->pattern = insn;
|
||
p->first_clobber = i + 1;
|
||
p->next = clobber_list;
|
||
clobber_list = p;
|
||
}
|
||
|
||
link->next = p->insns;
|
||
p->insns = link;
|
||
}
|
||
}
|
||
|
||
/* Don't mention instructions whose names are the null string
|
||
or begin with '*'. They are in the machine description just
|
||
to be recognized. */
|
||
if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*')
|
||
return;
|
||
|
||
/* Find out how many operands this function has,
|
||
and also whether any of them have register constraints. */
|
||
register_constraints = 0;
|
||
operands = max_operand_vec (insn, 1);
|
||
if (max_dup_opno >= operands)
|
||
fatal ("match_dup operand number has no match_operand");
|
||
|
||
/* Output the function name and argument declarations. */
|
||
printf ("rtx\ngen_%s (", XSTR (insn, 0));
|
||
for (i = 0; i < operands; i++)
|
||
printf (i ? ", operand%d" : "operand%d", i);
|
||
printf (")\n");
|
||
for (i = 0; i < operands; i++)
|
||
printf (" rtx operand%d;\n", i);
|
||
printf ("{\n");
|
||
|
||
/* Output code to construct and return the rtl for the instruction body */
|
||
|
||
if (XVECLEN (insn, 1) == 1)
|
||
{
|
||
printf (" return ");
|
||
gen_exp (XVECEXP (insn, 1, 0));
|
||
printf (";\n}\n\n");
|
||
}
|
||
else
|
||
{
|
||
printf (" return gen_rtx (PARALLEL, VOIDmode, gen_rtvec (%d", XVECLEN (insn, 1));
|
||
for (i = 0; i < XVECLEN (insn, 1); i++)
|
||
{
|
||
printf (",\n\t\t");
|
||
gen_exp (XVECEXP (insn, 1, i));
|
||
}
|
||
printf ("));\n}\n\n");
|
||
}
|
||
}
|
||
|
||
/* Generate the `gen_...' function for a DEFINE_EXPAND. */
|
||
|
||
static void
|
||
gen_expand (expand)
|
||
rtx expand;
|
||
{
|
||
int operands;
|
||
register int i;
|
||
|
||
if (strlen (XSTR (expand, 0)) == 0)
|
||
fatal ("define_expand lacks a name");
|
||
if (XVEC (expand, 1) == 0)
|
||
fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0));
|
||
|
||
/* Find out how many operands this function has,
|
||
and also whether any of them have register constraints. */
|
||
register_constraints = 0;
|
||
|
||
operands = max_operand_vec (expand, 1);
|
||
|
||
/* Output the function name and argument declarations. */
|
||
printf ("rtx\ngen_%s (", XSTR (expand, 0));
|
||
for (i = 0; i < operands; i++)
|
||
printf (i ? ", operand%d" : "operand%d", i);
|
||
printf (")\n");
|
||
for (i = 0; i < operands; i++)
|
||
printf (" rtx operand%d;\n", i);
|
||
printf ("{\n");
|
||
|
||
/* If we don't have any C code to write, only one insn is being written,
|
||
and no MATCH_DUPs are present, we can just return the desired insn
|
||
like we do for a DEFINE_INSN. This saves memory. */
|
||
if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0')
|
||
&& operands > max_dup_opno
|
||
&& XVECLEN (expand, 1) == 1)
|
||
{
|
||
printf (" return ");
|
||
gen_exp (XVECEXP (expand, 1, 0));
|
||
printf (";\n}\n\n");
|
||
return;
|
||
}
|
||
|
||
/* For each operand referred to only with MATCH_DUPs,
|
||
make a local variable. */
|
||
for (i = operands; i <= max_dup_opno; i++)
|
||
printf (" rtx operand%d;\n", i);
|
||
if (operands > 0 || max_dup_opno >= 0)
|
||
printf (" rtx operands[%d];\n", MAX (operands, max_dup_opno + 1));
|
||
printf (" rtx _val = 0;\n");
|
||
printf (" start_sequence ();\n");
|
||
|
||
/* The fourth operand of DEFINE_EXPAND is some code to be executed
|
||
before the actual construction.
|
||
This code expects to refer to `operands'
|
||
just as the output-code in a DEFINE_INSN does,
|
||
but here `operands' is an automatic array.
|
||
So copy the operand values there before executing it. */
|
||
if (XSTR (expand, 3) && *XSTR (expand, 3))
|
||
{
|
||
/* Output code to copy the arguments into `operands'. */
|
||
for (i = 0; i < operands; i++)
|
||
printf (" operands[%d] = operand%d;\n", i, i);
|
||
|
||
/* Output the special code to be executed before the sequence
|
||
is generated. */
|
||
printf ("%s\n", XSTR (expand, 3));
|
||
|
||
/* Output code to copy the arguments back out of `operands'
|
||
(unless we aren't going to use them at all). */
|
||
if (XVEC (expand, 1) != 0)
|
||
{
|
||
for (i = 0; i < operands; i++)
|
||
printf (" operand%d = operands[%d];\n", i, i);
|
||
for (; i <= max_dup_opno; i++)
|
||
printf (" operand%d = operands[%d];\n", i, i);
|
||
}
|
||
}
|
||
|
||
/* Output code to construct the rtl for the instruction bodies.
|
||
Use emit_insn to add them to the sequence being accumulated.
|
||
But don't do this if the user's code has set `no_more' nonzero. */
|
||
|
||
for (i = 0; i < XVECLEN (expand, 1); i++)
|
||
{
|
||
rtx next = XVECEXP (expand, 1, i);
|
||
if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC)
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == SET
|
||
&& GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC)
|
||
|| GET_CODE (next) == RETURN)
|
||
printf (" emit_jump_insn (");
|
||
else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL)
|
||
|| GET_CODE (next) == CALL
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == SET
|
||
&& GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL)
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == CALL))
|
||
printf (" emit_call_insn (");
|
||
else if (GET_CODE (next) == CODE_LABEL)
|
||
printf (" emit_label (");
|
||
else if (GET_CODE (next) == MATCH_OPERAND
|
||
|| GET_CODE (next) == MATCH_OPERATOR
|
||
|| GET_CODE (next) == MATCH_PARALLEL
|
||
|| GET_CODE (next) == MATCH_OP_DUP
|
||
|| GET_CODE (next) == MATCH_DUP
|
||
|| GET_CODE (next) == PARALLEL)
|
||
printf (" emit (");
|
||
else
|
||
printf (" emit_insn (");
|
||
gen_exp (next);
|
||
printf (");\n");
|
||
if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC
|
||
&& GET_CODE (SET_SRC (next)) == LABEL_REF)
|
||
printf (" emit_barrier ();");
|
||
}
|
||
|
||
/* Call `gen_sequence' to make a SEQUENCE out of all the
|
||
insns emitted within this gen_... function. */
|
||
|
||
printf (" _done:\n");
|
||
printf (" _val = gen_sequence ();\n");
|
||
printf (" _fail:\n");
|
||
printf (" end_sequence ();\n");
|
||
printf (" return _val;\n}\n\n");
|
||
}
|
||
|
||
/* Like gen_expand, but generates a SEQUENCE. */
|
||
static void
|
||
gen_split (split)
|
||
rtx split;
|
||
{
|
||
register int i;
|
||
int operands;
|
||
|
||
if (XVEC (split, 0) == 0)
|
||
fatal ("define_split (definition %d) lacks a pattern", insn_index_number);
|
||
else if (XVEC (split, 2) == 0)
|
||
fatal ("define_split (definition %d) lacks a replacement pattern",
|
||
insn_index_number);
|
||
|
||
/* Find out how many operands this function has. */
|
||
|
||
max_operand_vec (split, 2);
|
||
operands = MAX (max_opno, max_dup_opno) + 1;
|
||
|
||
/* Output the function name and argument declarations. */
|
||
printf ("rtx\ngen_split_%d (operands)\n rtx *operands;\n",
|
||
insn_code_number);
|
||
printf ("{\n");
|
||
|
||
/* Declare all local variables. */
|
||
for (i = 0; i < operands; i++)
|
||
printf (" rtx operand%d;\n", i);
|
||
printf (" rtx _val = 0;\n");
|
||
printf (" start_sequence ();\n");
|
||
|
||
/* The fourth operand of DEFINE_SPLIT is some code to be executed
|
||
before the actual construction. */
|
||
|
||
if (XSTR (split, 3))
|
||
printf ("%s\n", XSTR (split, 3));
|
||
|
||
/* Output code to copy the arguments back out of `operands' */
|
||
for (i = 0; i < operands; i++)
|
||
printf (" operand%d = operands[%d];\n", i, i);
|
||
|
||
/* Output code to construct the rtl for the instruction bodies.
|
||
Use emit_insn to add them to the sequence being accumulated.
|
||
But don't do this if the user's code has set `no_more' nonzero. */
|
||
|
||
for (i = 0; i < XVECLEN (split, 2); i++)
|
||
{
|
||
rtx next = XVECEXP (split, 2, i);
|
||
if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC)
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == SET
|
||
&& GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC)
|
||
|| GET_CODE (next) == RETURN)
|
||
printf (" emit_jump_insn (");
|
||
else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL)
|
||
|| GET_CODE (next) == CALL
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == SET
|
||
&& GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL)
|
||
|| (GET_CODE (next) == PARALLEL
|
||
&& GET_CODE (XVECEXP (next, 0, 0)) == CALL))
|
||
printf (" emit_call_insn (");
|
||
else if (GET_CODE (next) == CODE_LABEL)
|
||
printf (" emit_label (");
|
||
else if (GET_CODE (next) == MATCH_OPERAND
|
||
|| GET_CODE (next) == MATCH_OPERATOR
|
||
|| GET_CODE (next) == MATCH_PARALLEL
|
||
|| GET_CODE (next) == MATCH_OP_DUP
|
||
|| GET_CODE (next) == MATCH_DUP
|
||
|| GET_CODE (next) == PARALLEL)
|
||
printf (" emit (");
|
||
else
|
||
printf (" emit_insn (");
|
||
gen_exp (next);
|
||
printf (");\n");
|
||
if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC
|
||
&& GET_CODE (SET_SRC (next)) == LABEL_REF)
|
||
printf (" emit_barrier ();");
|
||
}
|
||
|
||
/* Call `gen_sequence' to make a SEQUENCE out of all the
|
||
insns emitted within this gen_... function. */
|
||
|
||
printf (" _done:\n");
|
||
printf (" _val = gen_sequence ();\n");
|
||
printf (" _fail:\n");
|
||
printf (" end_sequence ();\n");
|
||
printf (" return _val;\n}\n\n");
|
||
}
|
||
|
||
/* Write a function, `add_clobbers', that is given a PARALLEL of sufficient
|
||
size for the insn and an INSN_CODE, and inserts the required CLOBBERs at
|
||
the end of the vector. */
|
||
|
||
static void
|
||
output_add_clobbers ()
|
||
{
|
||
struct clobber_pat *clobber;
|
||
struct clobber_ent *ent;
|
||
int i;
|
||
|
||
printf ("\n\nvoid\nadd_clobbers (pattern, insn_code_number)\n");
|
||
printf (" rtx pattern;\n int insn_code_number;\n");
|
||
printf ("{\n");
|
||
printf (" int i;\n\n");
|
||
printf (" switch (insn_code_number)\n");
|
||
printf (" {\n");
|
||
|
||
for (clobber = clobber_list; clobber; clobber = clobber->next)
|
||
{
|
||
for (ent = clobber->insns; ent; ent = ent->next)
|
||
printf (" case %d:\n", ent->code_number);
|
||
|
||
for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++)
|
||
{
|
||
printf (" XVECEXP (pattern, 0, %d) = ", i);
|
||
gen_exp (XVECEXP (clobber->pattern, 1, i));
|
||
printf (";\n");
|
||
}
|
||
|
||
printf (" break;\n\n");
|
||
}
|
||
|
||
printf (" default:\n");
|
||
printf (" abort ();\n");
|
||
printf (" }\n");
|
||
printf ("}\n");
|
||
}
|
||
|
||
/* Write a function, init_mov_optab, that is called to set up entries
|
||
in mov_optab for EXTRA_CC_MODES. */
|
||
|
||
static void
|
||
output_init_mov_optab ()
|
||
{
|
||
#ifdef EXTRA_CC_NAMES
|
||
static char *cc_names[] = { EXTRA_CC_NAMES };
|
||
char *p;
|
||
int i;
|
||
|
||
printf ("\nvoid\ninit_mov_optab ()\n{\n");
|
||
|
||
for (i = 0; i < sizeof cc_names / sizeof cc_names[0]; i++)
|
||
{
|
||
printf ("#ifdef HAVE_mov");
|
||
for (p = cc_names[i]; *p; p++)
|
||
printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p);
|
||
printf ("\n");
|
||
printf (" if (HAVE_mov");
|
||
for (p = cc_names[i]; *p; p++)
|
||
printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p);
|
||
printf (")\n");
|
||
printf (" mov_optab->handlers[(int) %smode].insn_code = CODE_FOR_mov",
|
||
cc_names[i]);
|
||
for (p = cc_names[i]; *p; p++)
|
||
printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p);
|
||
printf (";\n#endif\n");
|
||
}
|
||
|
||
printf ("}\n");
|
||
#endif
|
||
}
|
||
|
||
char *
|
||
xmalloc (size)
|
||
unsigned size;
|
||
{
|
||
register char *val = (char *) malloc (size);
|
||
|
||
if (val == 0)
|
||
fatal ("virtual memory exhausted");
|
||
|
||
return val;
|
||
}
|
||
|
||
char *
|
||
xrealloc (ptr, size)
|
||
char *ptr;
|
||
unsigned size;
|
||
{
|
||
char *result = (char *) realloc (ptr, size);
|
||
if (!result)
|
||
fatal ("virtual memory exhausted");
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
fatal (s, a1, a2)
|
||
char *s;
|
||
{
|
||
fprintf (stderr, "genemit: ");
|
||
fprintf (stderr, s, a1, a2);
|
||
fprintf (stderr, "\n");
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
|
||
/* More 'friendly' abort that prints the line and file.
|
||
config.h can #define abort fancy_abort if you like that sort of thing. */
|
||
|
||
void
|
||
fancy_abort ()
|
||
{
|
||
fatal ("Internal gcc abort.");
|
||
}
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
rtx desc;
|
||
FILE *infile;
|
||
register int c;
|
||
|
||
obstack_init (rtl_obstack);
|
||
|
||
if (argc <= 1)
|
||
fatal ("No input file name.");
|
||
|
||
infile = fopen (argv[1], "r");
|
||
if (infile == 0)
|
||
{
|
||
perror (argv[1]);
|
||
exit (FATAL_EXIT_CODE);
|
||
}
|
||
|
||
init_rtl ();
|
||
|
||
/* Assign sequential codes to all entries in the machine description
|
||
in parallel with the tables in insn-output.c. */
|
||
|
||
insn_code_number = 0;
|
||
insn_index_number = 0;
|
||
|
||
printf ("/* Generated automatically by the program `genemit'\n\
|
||
from the machine description file `md'. */\n\n");
|
||
|
||
printf ("#include \"config.h\"\n");
|
||
printf ("#include \"rtl.h\"\n");
|
||
printf ("#include \"expr.h\"\n");
|
||
printf ("#include \"real.h\"\n");
|
||
printf ("#include \"output.h\"\n");
|
||
printf ("#include \"insn-config.h\"\n\n");
|
||
printf ("#include \"insn-flags.h\"\n\n");
|
||
printf ("#include \"insn-codes.h\"\n\n");
|
||
printf ("extern char *insn_operand_constraint[][MAX_RECOG_OPERANDS];\n\n");
|
||
printf ("extern rtx recog_operand[];\n");
|
||
printf ("#define operands emit_operand\n\n");
|
||
printf ("#define FAIL goto _fail\n\n");
|
||
printf ("#define DONE goto _done\n\n");
|
||
|
||
/* Read the machine description. */
|
||
|
||
while (1)
|
||
{
|
||
c = read_skip_spaces (infile);
|
||
if (c == EOF)
|
||
break;
|
||
ungetc (c, infile);
|
||
|
||
desc = read_rtx (infile);
|
||
if (GET_CODE (desc) == DEFINE_INSN)
|
||
{
|
||
gen_insn (desc);
|
||
++insn_code_number;
|
||
}
|
||
if (GET_CODE (desc) == DEFINE_EXPAND)
|
||
{
|
||
gen_expand (desc);
|
||
++insn_code_number;
|
||
}
|
||
if (GET_CODE (desc) == DEFINE_SPLIT)
|
||
{
|
||
gen_split (desc);
|
||
++insn_code_number;
|
||
}
|
||
if (GET_CODE (desc) == DEFINE_PEEPHOLE)
|
||
{
|
||
++insn_code_number;
|
||
}
|
||
++insn_index_number;
|
||
}
|
||
|
||
/* Write out the routine to add CLOBBERs to a pattern. */
|
||
output_add_clobbers ();
|
||
|
||
/* Write the routine to initialize mov_optab for the EXTRA_CC_MODES. */
|
||
output_init_mov_optab ();
|
||
|
||
fflush (stdout);
|
||
exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
|
||
/* NOTREACHED */
|
||
return 0;
|
||
}
|