/* Generate code from machine description to perform peephole optimizations.
- Copyright (C) 1987, 1989, 1992, 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1987-2022 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 3, 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 COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
-#include "hconfig.h"
-#ifdef __STDC__
-#include <stdarg.h>
-#else
-#include <varargs.h>
-#endif
+#include "bconfig.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.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
-
-/* Define this so we can link with print-rtl.o to get debug_rtx function. */
-char **insn_name_ptr = 0;
/* While tree-walking an instruction pattern, we keep a chain
of these `struct link's to record how to get down to the
int vecelt;
};
-char *xmalloc PROTO((unsigned));
-static void fatal PVPROTO ((char *, ...)) ATTRIBUTE_PRINTF_1;
-void fancy_abort PROTO((void));
-
static int max_opno;
/* Number of operands used in current peephole definition. */
static int n_operands;
-/* Peephole optimizations get insn codes just like insn patterns.
- Count them so we know the code of the define_peephole we are handling. */
-
-static int insn_code_number = 0;
-
-static void gen_peephole PROTO((rtx));
-static void match_rtx PROTO((rtx, struct link *, int));
-static void print_path PROTO((struct link *));
-static void print_code PROTO((RTX_CODE));
+static void match_rtx (rtx, struct link *, int);
+static void print_path (struct link *);
+static void print_code (RTX_CODE);
\f
static void
-gen_peephole (peep)
- rtx peep;
+gen_peephole (md_rtx_info *info)
{
+ rtx peep = info->def;
int ninsns = XVECLEN (peep, 0);
int i;
n_operands = 0;
printf (" insn = ins1;\n");
-#if 0
- printf (" want_jump = 0;\n");
-#endif
for (i = 0; i < ninsns; i++)
{
if (i > 0)
{
printf (" do { insn = NEXT_INSN (insn);\n");
- printf (" if (insn == 0) goto L%d; }\n",
- insn_code_number);
- printf (" while (GET_CODE (insn) == NOTE\n");
- printf ("\t || (GET_CODE (insn) == INSN\n");
+ printf (" if (insn == 0) goto L%d; }\n", info->index);
+ printf (" while (NOTE_P (insn)\n");
+ printf ("\t || (NONJUMP_INSN_P (insn)\n");
printf ("\t && (GET_CODE (PATTERN (insn)) == USE\n");
printf ("\t\t || GET_CODE (PATTERN (insn)) == CLOBBER)));\n");
- printf (" if (GET_CODE (insn) == CODE_LABEL\n\
- || GET_CODE (insn) == BARRIER)\n goto L%d;\n",
- insn_code_number);
+ printf (" if (LABEL_P (insn)\n\
+ || BARRIER_P (insn))\n goto L%d;\n", info->index);
}
-#if 0
- printf (" if (GET_CODE (insn) == JUMP_INSN)\n");
- printf (" want_jump = JUMP_LABEL (insn);\n");
-#endif
-
printf (" pat = PATTERN (insn);\n");
/* Walk the insn's pattern, remembering at all times the path
down to the walking point. */
- match_rtx (XVECEXP (peep, 0, i), NULL_PTR, insn_code_number);
+ match_rtx (XVECEXP (peep, 0, i), NULL, info->index);
}
/* We get this far if the pattern matches.
if (XSTR (peep, 1) && XSTR (peep, 1)[0])
printf (" if (! (%s)) goto L%d;\n",
- XSTR (peep, 1), insn_code_number);
+ XSTR (peep, 1), info->index);
/* If that matches, construct new pattern and put it in the first insn.
This new pattern will never be matched.
printf (" PATTERN (ins1) = gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (%d, operands));\n", n_operands);
-#if 0
- printf (" if (want_jump && GET_CODE (ins1) != JUMP_INSN)\n");
- printf (" {\n");
- printf (" rtx insn2 = emit_jump_insn_before (PATTERN (ins1), ins1);\n");
- printf (" delete_insn (ins1);\n");
- printf (" ins1 = ins2;\n");
- printf (" }\n");
-#endif
-
/* Record this define_peephole's insn code in the insn,
as if it had been recognized to match this. */
- printf (" INSN_CODE (ins1) = %d;\n",
- insn_code_number);
+ printf (" INSN_CODE (ins1) = %d;\n", info->index);
/* Delete the remaining insns. */
if (ninsns > 1)
cannot be zero. */
printf (" return NEXT_INSN (insn);\n");
- printf (" L%d:\n\n", insn_code_number);
+ printf (" L%d:\n\n", info->index);
}
\f
static void
-match_rtx (x, path, fail_label)
- rtx x;
- struct link *path;
- int fail_label;
+match_rtx (rtx x, struct link *path, int fail_label)
{
- register RTX_CODE code;
- register int i;
- register int len;
- register char *fmt;
+ RTX_CODE code;
+ int i;
+ int len;
+ const char *fmt;
struct link link;
if (x == 0)
}
return;
- case ADDRESS:
- match_rtx (XEXP (x, 0), path, fail_label);
- return;
-
default:
break;
}
printf (" if (XINT (x, %d) != %d) goto L%d;\n",
i, XINT (x, i), fail_label);
}
+ else if (fmt[i] == 'r')
+ {
+ gcc_assert (i == 0);
+ printf (" if (REGNO (x) != %d) goto L%d;\n",
+ REGNO (x), fail_label);
+ }
else if (fmt[i] == 'w')
{
/* Make sure that at run time `x' is the RTX we want to test. */
printf (" if (strcmp (XSTR (x, %d), \"%s\")) goto L%d;\n",
i, XSTR (x, i), fail_label);
}
+ else if (fmt[i] == 'p')
+ /* Not going to support subregs for legacy define_peeholes. */
+ gcc_unreachable ();
}
}
evaluate to the rtx at that point. */
static void
-print_path (path)
- struct link *path;
+print_path (struct link *path)
{
if (path == 0)
printf ("pat");
}
\f
static void
-print_code (code)
- RTX_CODE code;
+print_code (RTX_CODE code)
{
- register char *p1;
+ const char *p1;
for (p1 = GET_RTX_NAME (code); *p1; p1++)
- {
- if (*p1 >= 'a' && *p1 <= 'z')
- putchar (*p1 + 'A' - 'a');
- else
- putchar (*p1);
- }
-}
-\f
-char *
-xmalloc (size)
- unsigned size;
-{
- register char *val = (char *) malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
- return val;
+ putchar (TOUPPER (*p1));
}
-char *
-xrealloc (ptr, size)
- char *ptr;
- unsigned size;
-{
- char *result = (char *) realloc (ptr, size);
- if (!result)
- fatal ("virtual memory exhausted");
- return result;
-}
+extern int main (int, const char **);
-static void
-fatal VPROTO ((char *format, ...))
-{
-#ifndef __STDC__
- char *format;
-#endif
- va_list ap;
-
- VA_START (ap, format);
-
-#ifndef __STDC__
- format = va_arg (ap, char *);
-#endif
-
- fprintf (stderr, "genpeep: ");
- vfprintf (stderr, format, ap);
- va_end (ap);
- 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.");
-}
-\f
int
-main (argc, argv)
- int argc;
- char **argv;
+main (int argc, const char **argv)
{
- rtx desc;
- FILE *infile;
- register int c;
-
max_opno = -1;
- obstack_init (rtl_obstack);
+ progname = "genpeep";
- 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 ();
+ if (!init_rtx_reader_args (argc, argv))
+ return (FATAL_EXIT_CODE);
printf ("/* Generated automatically by the program `genpeep'\n\
from the machine description file `md'. */\n\n");
+ printf ("#define IN_TARGET_CODE 1\n");
printf ("#include \"config.h\"\n");
printf ("#include \"system.h\"\n");
+ printf ("#include \"coretypes.h\"\n");
+ printf ("#include \"backend.h\"\n");
+ printf ("#include \"tree.h\"\n");
printf ("#include \"rtl.h\"\n");
+ printf ("#include \"insn-config.h\"\n");
+ printf ("#include \"alias.h\"\n");
+ printf ("#include \"varasm.h\"\n");
+ printf ("#include \"stor-layout.h\"\n");
+ printf ("#include \"calls.h\"\n");
+ printf ("#include \"memmodel.h\"\n");
+ printf ("#include \"tm_p.h\"\n");
printf ("#include \"regs.h\"\n");
printf ("#include \"output.h\"\n");
- printf ("#include \"real.h\"\n");
- printf ("#include \"except.h\"\n\n");
+ printf ("#include \"recog.h\"\n");
+ printf ("#include \"except.h\"\n");
+ printf ("#include \"diagnostic-core.h\"\n");
+ printf ("#include \"flags.h\"\n");
+ printf ("#include \"tm-constrs.h\"\n\n");
printf ("extern rtx peep_operand[];\n\n");
printf ("#define operands peep_operand\n\n");
- printf ("rtx\npeephole (ins1)\n rtx ins1;\n{\n");
- printf (" rtx insn, x, pat;\n\n");
+ printf ("rtx_insn *\npeephole (rtx_insn *ins1)\n{\n");
+ printf (" rtx_insn *insn ATTRIBUTE_UNUSED;\n");
+ printf (" rtx x ATTRIBUTE_UNUSED, pat ATTRIBUTE_UNUSED;\n\n");
/* Early out: no peepholes for insns followed by barriers. */
printf (" if (NEXT_INSN (ins1)\n");
- printf (" && GET_CODE (NEXT_INSN (ins1)) == BARRIER)\n");
+ printf (" && BARRIER_P (NEXT_INSN (ins1)))\n");
printf (" return 0;\n\n");
/* Read the machine description. */
- while (1)
- {
- c = read_skip_spaces (infile);
- if (c == EOF)
+ md_rtx_info info;
+ while (read_md_rtx (&info))
+ switch (GET_CODE (info.def))
+ {
+ case DEFINE_PEEPHOLE:
+ gen_peephole (&info);
break;
- ungetc (c, infile);
- desc = read_rtx (infile);
- if (GET_CODE (desc) == DEFINE_PEEPHOLE)
- {
- gen_peephole (desc);
- insn_code_number++;
- }
- if (GET_CODE (desc) == DEFINE_INSN
- || GET_CODE (desc) == DEFINE_EXPAND
- || GET_CODE (desc) == DEFINE_SPLIT)
- {
- insn_code_number++;
- }
- }
+ default:
+ break;
+ }
printf (" return 0;\n}\n\n");
printf ("rtx peep_operand[%d];\n", max_opno + 1);
fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- /* NOTREACHED */
- return 0;
+ return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
}
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