X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fgenflags.c;h=fcfd2f1bd899938e6d440ae90d77801eec4bc48e;hb=f090c9d06962930a4a782d0e78d71cababf0fdb7;hp=f9add41640ca44d4f0349bfec5466de41ab81fed;hpb=929efc7f759e1f5725c3e6349f92c28193d8f432;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/genflags.c b/gcc/genflags.c
index f9add41640c..fcfd2f1bd89 100644
--- a/gcc/genflags.c
+++ b/gcc/genflags.c
@@ -1,127 +1,217 @@
 /* Generate from machine description:
    - some flags HAVE_... saying which simple standard instructions are
    available for this machine.
-   Copyright (C) 1987, 1991, 1995, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2003, 2004, 2007
+   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"
+#include "bconfig.h"
 #include "system.h"
+#include "coretypes.h"
+#include "tm.h"
 #include "rtl.h"
 #include "obstack.h"
 #include "errors.h"
+#include "gensupport.h"
 
+/* Obstack to remember insns with.  */
 static struct obstack obstack;
-struct obstack *rtl_obstack = &obstack;
-
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
-
-/* Obstacks to remember normal, and call insns.  */
-static struct obstack call_obstack, normal_obstack;
 
 /* Max size of names encountered.  */
 static int max_id_len;
 
-static int num_operands PARAMS ((rtx));
-static void gen_proto PARAMS ((rtx));
-static void gen_nonproto PARAMS ((rtx));
-static void gen_insn PARAMS ((rtx));
+/* Max operand encountered in a scan over some insn.  */
+static int max_opno;
 
+static void max_operand_1 (rtx);
+static int num_operands (rtx);
+static void gen_proto (rtx);
+static void gen_macro (const char *, int, int);
+static void gen_insn (int, rtx);
 
 /* Count the number of match_operand's found.  */
 
-static int
-num_operands (x)
-     rtx x;
+static void
+max_operand_1 (rtx x)
 {
-  int count = 0;
-  int i, j;
-  enum rtx_code code = GET_CODE (x);
-  const char *format_ptr = GET_RTX_FORMAT (code);
+  RTX_CODE code;
+  int i;
+  int len;
+  const char *fmt;
+
+  if (x == 0)
+    return;
 
-  if (code == MATCH_OPERAND)
-    return 1;
+  code = GET_CODE (x);
 
-  if (code == MATCH_OPERATOR || code == MATCH_PARALLEL)
-    count++;
+  if (code == MATCH_OPERAND || code == MATCH_OPERATOR
+      || code == MATCH_PARALLEL)
+    max_opno = MAX (max_opno, XINT (x, 0));
 
-  for (i = 0; i < GET_RTX_LENGTH (code); i++)
+  fmt = GET_RTX_FORMAT (code);
+  len = GET_RTX_LENGTH (code);
+  for (i = 0; i < len; i++)
     {
-      switch (*format_ptr++)
+      if (fmt[i] == 'e' || fmt[i] == 'u')
+	max_operand_1 (XEXP (x, i));
+      else if (fmt[i] == 'E')
 	{
-	case 'u':
-	case 'e':
-	  count += num_operands (XEXP (x, i));
-	  break;
-
-	case 'E':
-	  if (XVEC (x, i) != NULL)
-	    for (j = 0; j < XVECLEN (x, i); j++)
-	      count += num_operands (XVECEXP (x, i, j));
-
-	  break;
+	  int j;
+	  for (j = 0; j < XVECLEN (x, i); j++)
+	    max_operand_1 (XVECEXP (x, i, j));
 	}
     }
+}
+
+static int
+num_operands (rtx insn)
+{
+  int len = XVECLEN (insn, 1);
+  int i;
+
+  max_opno = -1;
+
+  for (i = 0; i < len; i++)
+    max_operand_1 (XVECEXP (insn, 1, i));
+
+  return max_opno + 1;
+}
+
+/* Print out a wrapper macro for a function which corrects the number
+   of arguments it takes.  Any missing arguments are assumed to be at
+   the end.  */
+static void
+gen_macro (const char *name, int real, int expect)
+{
+  int i;
 
-  return count;
+  gcc_assert (real <= expect);
+  gcc_assert (real);
+
+  /* #define GEN_CALL(A, B, C, D) gen_call((A), (B)) */
+  fputs ("#define GEN_", stdout);
+  for (i = 0; name[i]; i++)
+    putchar (TOUPPER (name[i]));
+
+  putchar('(');
+  for (i = 0; i < expect - 1; i++)
+    printf ("%c, ", i + 'A');
+  printf ("%c) gen_%s (", i + 'A', name);
+
+  for (i = 0; i < real - 1; i++)
+    printf ("(%c), ", i + 'A');
+  printf ("(%c))\n", i + 'A');
 }
 
-/* Print out prototype information for a function.  */
+/* Print out prototype information for a generator function.  If the
+   insn pattern has been elided, print out a dummy generator that
+   does nothing.  */
 
 static void
-gen_proto (insn)
-     rtx insn;
+gen_proto (rtx insn)
 {
   int num = num_operands (insn);
-  printf ("extern rtx gen_%-*s PARAMS ((", max_id_len, XSTR (insn, 0));
+  int i;
+  const char *name = XSTR (insn, 0);
+  int truth = maybe_eval_c_test (XSTR (insn, 2));
+
+  /* Many md files don't refer to the last two operands passed to the
+     call patterns.  This means their generator functions will be two
+     arguments too short.  Instead of changing every md file to touch
+     those operands, we wrap the prototypes in macros that take the
+     correct number of arguments.  */
+  if (name[0] == 'c' || name[0] == 's')
+    {
+      if (!strcmp (name, "call")
+	  || !strcmp (name, "call_pop")
+	  || !strcmp (name, "sibcall")
+	  || !strcmp (name, "sibcall_pop"))
+	gen_macro (name, num, 4);
+      else if (!strcmp (name, "call_value")
+	       || !strcmp (name, "call_value_pop")
+	       || !strcmp (name, "sibcall_value")
+	       || !strcmp (name, "sibcall_value_pop"))
+	gen_macro (name, num, 5);
+    }
+
+  if (truth != 0)
+    printf ("extern rtx        gen_%-*s (", max_id_len, name);
+  else
+    printf ("static inline rtx gen_%-*s (", max_id_len, name);
 
   if (num == 0)
-    printf ("void");
+    fputs ("void", stdout);
   else
     {
-      while (num-- > 1)
-	printf ("rtx, ");
+      for (i = 1; i < num; i++)
+	fputs ("rtx, ", stdout);
 
-      printf ("rtx");
+      fputs ("rtx", stdout);
     }
 
-  printf ("));\n");
-}
+  puts (");");
 
-/* Print out a function declaration without a prototype.  */
+  /* Some back ends want to take the address of generator functions,
+     so we cannot simply use #define for these dummy definitions.  */
+  if (truth == 0)
+    {
+      printf ("static inline rtx\ngen_%s", name);
+      if (num > 0)
+	{
+	  putchar ('(');
+	  for (i = 0; i < num-1; i++)
+	    printf ("rtx ARG_UNUSED (%c), ", 'a' + i);
+	  printf ("rtx ARG_UNUSED (%c))\n", 'a' + i);
+	}
+      else
+	puts ("(void)");
+      puts ("{\n  return 0;\n}");
+    }
 
-static void
-gen_nonproto (insn)
-     rtx insn;
-{
-  printf ("extern rtx gen_%s ();\n", XSTR (insn, 0));
 }
 
 static void
-gen_insn (insn)
-     rtx insn;
+gen_insn (int line_no, rtx insn)
 {
-  char *name = XSTR (insn, 0);
-  char *p;
-  struct obstack *obstack_ptr;
+  const char *name = XSTR (insn, 0);
+  const char *p;
+  const char *lt, *gt;
   int len;
+  int truth = maybe_eval_c_test (XSTR (insn, 2));
+
+  lt = strchr (name, '<');
+  if (lt && strchr (lt + 1, '>'))
+    {
+      message_with_line (line_no, "unresolved iterator");
+      have_error = 1;
+      return;
+    }
+
+  gt = strchr (name, '>');
+  if (lt || gt)
+    {
+      message_with_line (line_no,
+			 "unmatched angle brackets, likely "
+			 "an error in iterator syntax");
+      have_error = 1;
+      return;
+    }
 
   /* Don't mention instructions whose names are the null string
      or begin with '*'.  They are in the machine description just
@@ -134,153 +224,76 @@ gen_insn (insn)
   if (len > max_id_len)
     max_id_len = len;
 
-  printf ("#define HAVE_%s ", name);
-  if (strlen (XSTR (insn, 2)) == 0)
-    printf ("1\n");
+  if (truth == 0)
+    /* Emit nothing.  */;
+  else if (truth == 1)
+    printf ("#define HAVE_%s 1\n", name);
   else
     {
       /* Write the macro definition, putting \'s at the end of each line,
 	 if more than one.  */
-      printf ("(");
+      printf ("#define HAVE_%s (", name);
       for (p = XSTR (insn, 2); *p; p++)
 	{
-	  if (*p == '\n')
-	    printf (" \\\n");
+	  if (IS_VSPACE (*p))
+	    fputs (" \\\n", stdout);
 	  else
-	    printf ("%c", *p);
+	    putchar (*p);
 	}
-      printf (")\n");
+      fputs (")\n", stdout);
     }
 
-  /* Save the current insn, so that we can later put out appropriate
-     prototypes.  At present, most md files have the wrong number of
-     arguments for the call insns (call, call_value, call_pop,
-     call_value_pop) ignoring the extra arguments that are passed for
-     some machines, so by default, turn off the prototype.  */
-
-  obstack_ptr = (name[0] == 'c'
-		 && (!strcmp (name, "call")
-		     || !strcmp (name, "call_value")
-		     || !strcmp (name, "call_pop")
-		     || !strcmp (name, "call_value_pop")))
-    ? &call_obstack : &normal_obstack;
-
-  obstack_grow (obstack_ptr, &insn, sizeof (rtx));
-}
-
-PTR
-xmalloc (size)
-  size_t size;
-{
-  register PTR val = (PTR) malloc (size);
-
-  if (val == 0)
-    fatal ("virtual memory exhausted");
-
-  return val;
+  obstack_grow (&obstack, &insn, sizeof (rtx));
 }
 
-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 **));
-
 int
-main (argc, argv)
-     int argc;
-     char **argv;
+main (int argc, char **argv)
 {
   rtx desc;
   rtx dummy;
-  rtx *call_insns;
-  rtx *normal_insns;
+  rtx *insns;
   rtx *insn_ptr;
-  FILE *infile;
-  register int c;
 
   progname = "genflags";
-  obstack_init (rtl_obstack);
-  obstack_init (&call_obstack);
-  obstack_init (&normal_obstack);
+  obstack_init (&obstack);
 
-  if (argc <= 1)
-    fatal ("No input file name.");
+  /* We need to see all the possibilities.  Elided insns may have
+     direct calls to their generators in C code.  */
+  insn_elision = 0;
 
-  infile = fopen (argv[1], "r");
-  if (infile == 0)
-    {
-      perror (argv[1]);
-      return (FATAL_EXIT_CODE);
-    }
-  read_rtx_filename = argv[1];
+  if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
+    return (FATAL_EXIT_CODE);
 
-  printf ("/* Generated automatically by the program `genflags'\n\
-from the machine description file `md'.  */\n\n");
+  puts ("/* Generated automatically by the program `genflags'");
+  puts ("   from the machine description file `md'.  */\n");
+  puts ("#ifndef GCC_INSN_FLAGS_H");
+  puts ("#define GCC_INSN_FLAGS_H\n");
 
   /* Read the machine description.  */
 
   while (1)
     {
-      c = read_skip_spaces (infile);
-      if (c == EOF)
-	break;
-      ungetc (c, infile);
+      int line_no, insn_code_number = 0;
 
-      desc = read_rtx (infile);
+      desc = read_md_rtx (&line_no, &insn_code_number);
+      if (desc == NULL)
+	break;
       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
-	gen_insn (desc);
+	gen_insn (line_no, desc);
     }
 
   /* Print out the prototypes now.  */
   dummy = (rtx) 0;
-  obstack_grow (&call_obstack, &dummy, sizeof (rtx));
-  call_insns = (rtx *) obstack_finish (&call_obstack);
-
-  obstack_grow (&normal_obstack, &dummy, sizeof (rtx));
-  normal_insns = (rtx *) obstack_finish (&normal_obstack);
+  obstack_grow (&obstack, &dummy, sizeof (rtx));
+  insns = XOBFINISH (&obstack, rtx *);
 
-  printf ("\n#ifndef NO_MD_PROTOTYPES\n");
-  for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++)
+  for (insn_ptr = insns; *insn_ptr; insn_ptr++)
     gen_proto (*insn_ptr);
 
-  printf ("\n#ifdef MD_CALL_PROTOTYPES\n");
-  for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
-    gen_proto (*insn_ptr);
-
-  printf ("\n#else /* !MD_CALL_PROTOTYPES */\n");
-  for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
-    gen_nonproto (*insn_ptr);
-
-  printf ("#endif /* !MD_CALL_PROTOTYPES */\n");
-  printf ("\n#else  /* NO_MD_PROTOTYPES */\n");
-  for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++)
-    gen_nonproto (*insn_ptr);
-
-  for (insn_ptr = call_insns; *insn_ptr; insn_ptr++)
-    gen_nonproto (*insn_ptr);
+  puts("\n#endif /* GCC_INSN_FLAGS_H */");
 
-  printf ("#endif  /* NO_MD_PROTOTYPES */\n");
+  if (have_error || ferror (stdout) || fflush (stdout) || fclose (stdout))
+    return FATAL_EXIT_CODE;
 
-  fflush (stdout);
-  return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
-}
-
-/* Define this so we can link with print-rtl.o to get debug_rtx function.  */
-const char *
-get_insn_name (code)
-     int code ATTRIBUTE_UNUSED;
-{
-  return NULL;
+  return SUCCESS_EXIT_CODE;
 }