/* Generate code from machine description to emit insns as rtl.
- Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000
+ Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-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.
+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 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.
+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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "hconfig.h"
#include "system.h"
#include "rtl.h"
-#include "obstack.h"
#include "errors.h"
#include "gensupport.h"
-static struct obstack obstack;
-struct obstack *rtl_obstack = &obstack;
-
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
static int max_opno;
static int max_dup_opno;
rtx pattern;
int first_clobber;
struct clobber_pat *next;
+ int has_hard_reg;
} *clobber_list;
/* Records one insn that uses the clobber list. */
static void gen_expand PARAMS ((rtx));
static void gen_split PARAMS ((rtx));
static void output_add_clobbers PARAMS ((void));
+static void output_added_clobbers_hard_reg_p PARAMS ((void));
static void gen_rtx_scratch PARAMS ((rtx, enum rtx_code));
static void output_peephole2_scratches PARAMS ((rtx));
if (XVEC (insn, 1))
{
+ int has_hard_reg = 0;
+
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 (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER)
+ break;
+
+ if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) == REG)
+ has_hard_reg = 1;
+ else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH)
+ break;
+ }
if (i != XVECLEN (insn, 1) - 1)
{
p->pattern = insn;
p->first_clobber = i + 1;
p->next = clobber_list;
+ p->has_hard_reg = has_hard_reg;
clobber_list = p;
}
register int i;
int operands;
const char *name = "split";
+ const char *unused;
if (GET_CODE (split) == DEFINE_PEEPHOLE2)
name = "peephole2";
max_operand_vec (split, 2);
operands = MAX (max_opno, MAX (max_dup_opno, max_scratch_opno)) + 1;
+ unused = (operands == 0 ? " ATTRIBUTE_UNUSED" : "");
/* Output the prototype, function name and argument declarations. */
if (GET_CODE (split) == DEFINE_PEEPHOLE2)
{
printf ("extern rtx gen_%s_%d PARAMS ((rtx, rtx *));\n",
name, insn_code_number);
- printf ("rtx\ngen_%s_%d (curr_insn, operands)\n\
- rtx curr_insn ATTRIBUTE_UNUSED;\n\
- rtx *operands;\n",
+ printf ("rtx\ngen_%s_%d (curr_insn, operands)\n",
name, insn_code_number);
+ printf (" rtx curr_insn ATTRIBUTE_UNUSED;\n");
+ printf (" rtx *operands%s;\n", unused);
}
else
{
printf ("extern rtx gen_split_%d PARAMS ((rtx *));\n", insn_code_number);
- printf ("rtx\ngen_%s_%d (operands)\n rtx *operands;\n", name,
- insn_code_number);
+ printf ("rtx\ngen_%s_%d (operands)\n", name, insn_code_number);
+ printf (" rtx *operands%s;\n", unused);
}
printf ("{\n");
printf ("}\n");
}
\f
+/* Write a function, `added_clobbers_hard_reg_p' this is given an insn_code
+ number that needs clobbers and returns 1 if they include a clobber of a
+ hard reg and 0 if they just clobber SCRATCH. */
+
+static void
+output_added_clobbers_hard_reg_p ()
+{
+ struct clobber_pat *clobber;
+ struct clobber_ent *ent;
+ int clobber_p;
+
+ printf ("\n\nint\nadded_clobbers_hard_reg_p (insn_code_number)\n");
+ printf (" int insn_code_number;\n");
+ printf ("{\n");
+ printf (" switch (insn_code_number)\n");
+ printf (" {\n");
+
+ for (clobber_p = 0; clobber_p <= 1; clobber_p++)
+ {
+ for (clobber = clobber_list; clobber; clobber = clobber->next)
+ if (clobber->has_hard_reg == clobber_p)
+ for (ent = clobber->insns; ent; ent = ent->next)
+ printf (" case %d:\n", ent->code_number);
+
+ printf (" return %d;\n\n", clobber_p);
+ }
+
+ printf (" default:\n");
+ printf (" abort ();\n");
+ printf (" }\n");
+ printf ("}\n");
+}
+\f
/* Generate code to invoke find_free_register () as needed for the
- scratch registers used by the peephole2 pattern in SPLIT. */
+ scratch registers used by the peephole2 pattern in SPLIT. */
static void
output_peephole2_scratches (split)
int i;
int insn_nr = 0;
- printf (" rtx first_insn ATTRIBUTE_UNUSED;\n");
- printf (" rtx last_insn ATTRIBUTE_UNUSED;\n");
printf (" HARD_REG_SET _regs_allocated;\n");
-
printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n");
for (i = 0; i < XVECLEN (split, 0); i++)
}
else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH)
cur_insn_nr++;
- printf (" first_insn = recog_next_insn (curr_insn, %d);\n", insn_nr);
- if (last_insn_nr > insn_nr)
- printf (" last_insn = recog_next_insn (curr_insn, %d);\n",
- last_insn_nr - 1);
- else
- printf (" last_insn = 0;\n");
- printf (" if ((operands[%d] = find_free_register (first_insn, last_insn, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\
+
+ printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\
return NULL;\n",
XINT (elt, 0),
+ insn_nr, last_insn_nr,
XSTR (elt, 1),
GET_MODE_NAME (GET_MODE (elt)));
insn_nr++;
}
}
-\f
-PTR
-xmalloc (size)
- size_t size;
-{
- register PTR val = (PTR) malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
-
- return val;
-}
-
-PTR
-xrealloc (old, size)
- PTR old;
- size_t size;
-{
- register PTR ptr;
- if (old)
- ptr = (PTR) realloc (old, size);
- else
- ptr = (PTR) malloc (size);
- if (!ptr)
- fatal ("virtual memory exhausted");
- return ptr;
-}
extern int main PARAMS ((int, char **));
rtx desc;
progname = "genemit";
- obstack_init (rtl_obstack);
if (argc <= 1)
fatal ("No input file name.");
printf ("#include \"tm_p.h\"\n");
printf ("#include \"function.h\"\n");
printf ("#include \"expr.h\"\n");
+ printf ("#include \"optabs.h\"\n");
printf ("#include \"real.h\"\n");
printf ("#include \"flags.h\"\n");
printf ("#include \"output.h\"\n");
printf ("#include \"insn-config.h\"\n");
- printf ("#include \"insn-flags.h\"\n");
- printf ("#include \"insn-codes.h\"\n");
- printf ("#include \"recog.h\"\n");
printf ("#include \"hard-reg-set.h\"\n");
+ printf ("#include \"recog.h\"\n");
printf ("#include \"resource.h\"\n");
- printf ("#include \"reload.h\"\n\n");
+ printf ("#include \"reload.h\"\n");
+ printf ("#include \"toplev.h\"\n");
+ printf ("#include \"ggc.h\"\n\n");
printf ("#define FAIL return (end_sequence (), _val)\n");
printf ("#define DONE return (_val = gen_sequence (), end_sequence (), _val)\n");
++insn_index_number;
}
- /* Write out the routine to add CLOBBERs to a pattern. */
+ /* Write out the routines to add CLOBBERs to a pattern and say whether they
+ clobber a hard reg. */
output_add_clobbers ();
+ output_added_clobbers_hard_reg_p ();
fflush (stdout);
return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);