--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/sched-vis.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,787 @@
+/* Instruction scheduling pass.
+   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+   2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Contributed by Michael Tiemann (tiemann@cygnus.com) Enhanced by,
+   and currently maintained by, Jim Wilson (wilson@cygnus.com)
+
+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 "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "obstack.h"
+#include "hard-reg-set.h"
+#include "basic-block.h"
+#include "real.h"
+#include "insn-attr.h"
+#include "sched-int.h"
+#include "tree-pass.h"
+
+static char *safe_concat (char *, char *, const char *);
+
+#define BUF_LEN 2048
+
+static char *
+safe_concat (char *buf, char *cur, const char *str)
+{
+  char *end = buf + BUF_LEN - 2;	/* Leave room for null.  */
+  int c;
+
+  if (cur > end)
+    {
+      *end = '\0';
+      return end;
+    }
+
+  while (cur < end && (c = *str++) != '\0')
+    *cur++ = c;
+
+  *cur = '\0';
+  return cur;
+}
+
+/* This recognizes rtx, I classified as expressions.  These are always
+   represent some action on values or results of other expression, that
+   may be stored in objects representing values.  */
+
+static void
+print_exp (char *buf, const_rtx x, int verbose)
+{
+  char tmp[BUF_LEN];
+  const char *st[4];
+  char *cur = buf;
+  const char *fun = (char *) 0;
+  const char *sep;
+  rtx op[4];
+  int i;
+
+  for (i = 0; i < 4; i++)
+    {
+      st[i] = (char *) 0;
+      op[i] = NULL_RTX;
+    }
+
+  switch (GET_CODE (x))
+    {
+    case PLUS:
+      op[0] = XEXP (x, 0);
+      if (GET_CODE (XEXP (x, 1)) == CONST_INT
+	  && INTVAL (XEXP (x, 1)) < 0)
+	{
+	  st[1] = "-";
+	  op[1] = GEN_INT (-INTVAL (XEXP (x, 1)));
+	}
+      else
+	{
+	  st[1] = "+";
+	  op[1] = XEXP (x, 1);
+	}
+      break;
+    case LO_SUM:
+      op[0] = XEXP (x, 0);
+      st[1] = "+low(";
+      op[1] = XEXP (x, 1);
+      st[2] = ")";
+      break;
+    case MINUS:
+      op[0] = XEXP (x, 0);
+      st[1] = "-";
+      op[1] = XEXP (x, 1);
+      break;
+    case COMPARE:
+      fun = "cmp";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case NEG:
+      st[0] = "-";
+      op[0] = XEXP (x, 0);
+      break;
+    case MULT:
+      op[0] = XEXP (x, 0);
+      st[1] = "*";
+      op[1] = XEXP (x, 1);
+      break;
+    case DIV:
+      op[0] = XEXP (x, 0);
+      st[1] = "/";
+      op[1] = XEXP (x, 1);
+      break;
+    case UDIV:
+      fun = "udiv";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case MOD:
+      op[0] = XEXP (x, 0);
+      st[1] = "%";
+      op[1] = XEXP (x, 1);
+      break;
+    case UMOD:
+      fun = "umod";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case SMIN:
+      fun = "smin";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case SMAX:
+      fun = "smax";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case UMIN:
+      fun = "umin";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case UMAX:
+      fun = "umax";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case NOT:
+      st[0] = "!";
+      op[0] = XEXP (x, 0);
+      break;
+    case AND:
+      op[0] = XEXP (x, 0);
+      st[1] = "&";
+      op[1] = XEXP (x, 1);
+      break;
+    case IOR:
+      op[0] = XEXP (x, 0);
+      st[1] = "|";
+      op[1] = XEXP (x, 1);
+      break;
+    case XOR:
+      op[0] = XEXP (x, 0);
+      st[1] = "^";
+      op[1] = XEXP (x, 1);
+      break;
+    case ASHIFT:
+      op[0] = XEXP (x, 0);
+      st[1] = "<<";
+      op[1] = XEXP (x, 1);
+      break;
+    case LSHIFTRT:
+      op[0] = XEXP (x, 0);
+      st[1] = " 0>>";
+      op[1] = XEXP (x, 1);
+      break;
+    case ASHIFTRT:
+      op[0] = XEXP (x, 0);
+      st[1] = ">>";
+      op[1] = XEXP (x, 1);
+      break;
+    case ROTATE:
+      op[0] = XEXP (x, 0);
+      st[1] = "<-<";
+      op[1] = XEXP (x, 1);
+      break;
+    case ROTATERT:
+      op[0] = XEXP (x, 0);
+      st[1] = ">->";
+      op[1] = XEXP (x, 1);
+      break;
+    case ABS:
+      fun = "abs";
+      op[0] = XEXP (x, 0);
+      break;
+    case SQRT:
+      fun = "sqrt";
+      op[0] = XEXP (x, 0);
+      break;
+    case FFS:
+      fun = "ffs";
+      op[0] = XEXP (x, 0);
+      break;
+    case EQ:
+      op[0] = XEXP (x, 0);
+      st[1] = "==";
+      op[1] = XEXP (x, 1);
+      break;
+    case NE:
+      op[0] = XEXP (x, 0);
+      st[1] = "!=";
+      op[1] = XEXP (x, 1);
+      break;
+    case GT:
+      op[0] = XEXP (x, 0);
+      st[1] = ">";
+      op[1] = XEXP (x, 1);
+      break;
+    case GTU:
+      fun = "gtu";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case LT:
+      op[0] = XEXP (x, 0);
+      st[1] = "<";
+      op[1] = XEXP (x, 1);
+      break;
+    case LTU:
+      fun = "ltu";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case GE:
+      op[0] = XEXP (x, 0);
+      st[1] = ">=";
+      op[1] = XEXP (x, 1);
+      break;
+    case GEU:
+      fun = "geu";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case LE:
+      op[0] = XEXP (x, 0);
+      st[1] = "<=";
+      op[1] = XEXP (x, 1);
+      break;
+    case LEU:
+      fun = "leu";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      break;
+    case SIGN_EXTRACT:
+      fun = (verbose) ? "sign_extract" : "sxt";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      op[2] = XEXP (x, 2);
+      break;
+    case ZERO_EXTRACT:
+      fun = (verbose) ? "zero_extract" : "zxt";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      op[2] = XEXP (x, 2);
+      break;
+    case SIGN_EXTEND:
+      fun = (verbose) ? "sign_extend" : "sxn";
+      op[0] = XEXP (x, 0);
+      break;
+    case ZERO_EXTEND:
+      fun = (verbose) ? "zero_extend" : "zxn";
+      op[0] = XEXP (x, 0);
+      break;
+    case FLOAT_EXTEND:
+      fun = (verbose) ? "float_extend" : "fxn";
+      op[0] = XEXP (x, 0);
+      break;
+    case TRUNCATE:
+      fun = (verbose) ? "trunc" : "trn";
+      op[0] = XEXP (x, 0);
+      break;
+    case FLOAT_TRUNCATE:
+      fun = (verbose) ? "float_trunc" : "ftr";
+      op[0] = XEXP (x, 0);
+      break;
+    case FLOAT:
+      fun = (verbose) ? "float" : "flt";
+      op[0] = XEXP (x, 0);
+      break;
+    case UNSIGNED_FLOAT:
+      fun = (verbose) ? "uns_float" : "ufl";
+      op[0] = XEXP (x, 0);
+      break;
+    case FIX:
+      fun = "fix";
+      op[0] = XEXP (x, 0);
+      break;
+    case UNSIGNED_FIX:
+      fun = (verbose) ? "uns_fix" : "ufx";
+      op[0] = XEXP (x, 0);
+      break;
+    case PRE_DEC:
+      st[0] = "--";
+      op[0] = XEXP (x, 0);
+      break;
+    case PRE_INC:
+      st[0] = "++";
+      op[0] = XEXP (x, 0);
+      break;
+    case POST_DEC:
+      op[0] = XEXP (x, 0);
+      st[1] = "--";
+      break;
+    case POST_INC:
+      op[0] = XEXP (x, 0);
+      st[1] = "++";
+      break;
+    case PRE_MODIFY:
+      st[0] = "pre ";
+      op[0] = XEXP (XEXP (x, 1), 0);
+      st[1] = "+=";
+      op[1] = XEXP (XEXP (x, 1), 1);
+      break;
+    case POST_MODIFY:
+      st[0] = "post ";
+      op[0] = XEXP (XEXP (x, 1), 0);
+      st[1] = "+=";
+      op[1] = XEXP (XEXP (x, 1), 1);
+      break;
+    case CALL:
+      st[0] = "call ";
+      op[0] = XEXP (x, 0);
+      if (verbose)
+	{
+	  st[1] = " argc:";
+	  op[1] = XEXP (x, 1);
+	}
+      break;
+    case IF_THEN_ELSE:
+      st[0] = "{(";
+      op[0] = XEXP (x, 0);
+      st[1] = ")?";
+      op[1] = XEXP (x, 1);
+      st[2] = ":";
+      op[2] = XEXP (x, 2);
+      st[3] = "}";
+      break;
+    case TRAP_IF:
+      fun = "trap_if";
+      op[0] = TRAP_CONDITION (x);
+      break;
+    case PREFETCH:
+      fun = "prefetch";
+      op[0] = XEXP (x, 0);
+      op[1] = XEXP (x, 1);
+      op[2] = XEXP (x, 2);
+      break;
+    case UNSPEC:
+    case UNSPEC_VOLATILE:
+      {
+	cur = safe_concat (buf, cur, "unspec");
+	if (GET_CODE (x) == UNSPEC_VOLATILE)
+	  cur = safe_concat (buf, cur, "/v");
+	cur = safe_concat (buf, cur, "[");
+	sep = "";
+	for (i = 0; i < XVECLEN (x, 0); i++)
+	  {
+	    print_pattern (tmp, XVECEXP (x, 0, i), verbose);
+	    cur = safe_concat (buf, cur, sep);
+	    cur = safe_concat (buf, cur, tmp);
+	    sep = ",";
+	  }
+	cur = safe_concat (buf, cur, "] ");
+	sprintf (tmp, "%d", XINT (x, 1));
+	cur = safe_concat (buf, cur, tmp);
+      }
+      break;
+    default:
+      /* If (verbose) debug_rtx (x);  */
+      st[0] = GET_RTX_NAME (GET_CODE (x));
+      break;
+    }
+
+  /* Print this as a function?  */
+  if (fun)
+    {
+      cur = safe_concat (buf, cur, fun);
+      cur = safe_concat (buf, cur, "(");
+    }
+
+  for (i = 0; i < 4; i++)
+    {
+      if (st[i])
+	cur = safe_concat (buf, cur, st[i]);
+
+      if (op[i])
+	{
+	  if (fun && i != 0)
+	    cur = safe_concat (buf, cur, ",");
+
+	  print_value (tmp, op[i], verbose);
+	  cur = safe_concat (buf, cur, tmp);
+	}
+    }
+
+  if (fun)
+    cur = safe_concat (buf, cur, ")");
+}		/* print_exp */
+
+/* Prints rtxes, I customarily classified as values.  They're constants,
+   registers, labels, symbols and memory accesses.  */
+
+void
+print_value (char *buf, const_rtx x, int verbose)
+{
+  char t[BUF_LEN];
+  char *cur = buf;
+
+  switch (GET_CODE (x))
+    {
+    case CONST_INT:
+      sprintf (t, HOST_WIDE_INT_PRINT_HEX,
+	       (unsigned HOST_WIDE_INT) INTVAL (x));
+      cur = safe_concat (buf, cur, t);
+      break;
+    case CONST_DOUBLE:
+      if (FLOAT_MODE_P (GET_MODE (x)))
+	real_to_decimal (t, CONST_DOUBLE_REAL_VALUE (x), sizeof (t), 0, 1);
+      else
+	sprintf (t,
+		 "<" HOST_WIDE_INT_PRINT_HEX "," HOST_WIDE_INT_PRINT_HEX ">",
+		 (unsigned HOST_WIDE_INT) CONST_DOUBLE_LOW (x),
+		 (unsigned HOST_WIDE_INT) CONST_DOUBLE_HIGH (x));
+      cur = safe_concat (buf, cur, t);
+      break;
+    case CONST_FIXED:
+      fixed_to_decimal (t, CONST_FIXED_VALUE (x), sizeof (t));
+      cur = safe_concat (buf, cur, t);
+      break;
+    case CONST_STRING:
+      cur = safe_concat (buf, cur, "\"");
+      cur = safe_concat (buf, cur, XSTR (x, 0));
+      cur = safe_concat (buf, cur, "\"");
+      break;
+    case SYMBOL_REF:
+      cur = safe_concat (buf, cur, "`");
+      cur = safe_concat (buf, cur, XSTR (x, 0));
+      cur = safe_concat (buf, cur, "'");
+      break;
+    case LABEL_REF:
+      sprintf (t, "L%d", INSN_UID (XEXP (x, 0)));
+      cur = safe_concat (buf, cur, t);
+      break;
+    case CONST:
+      print_value (t, XEXP (x, 0), verbose);
+      cur = safe_concat (buf, cur, "const(");
+      cur = safe_concat (buf, cur, t);
+      cur = safe_concat (buf, cur, ")");
+      break;
+    case HIGH:
+      print_value (t, XEXP (x, 0), verbose);
+      cur = safe_concat (buf, cur, "high(");
+      cur = safe_concat (buf, cur, t);
+      cur = safe_concat (buf, cur, ")");
+      break;
+    case REG:
+      if (REGNO (x) < FIRST_PSEUDO_REGISTER)
+	{
+	  int c = reg_names[REGNO (x)][0];
+	  if (ISDIGIT (c))
+	    cur = safe_concat (buf, cur, "%");
+
+	  cur = safe_concat (buf, cur, reg_names[REGNO (x)]);
+	}
+      else
+	{
+	  sprintf (t, "r%d", REGNO (x));
+	  cur = safe_concat (buf, cur, t);
+	}
+      if (verbose
+#ifdef INSN_SCHEDULING
+	  && !current_sched_info
+#endif
+	 )
+	{
+	  sprintf (t, ":%s", GET_MODE_NAME (GET_MODE (x)));
+	  cur = safe_concat (buf, cur, t);
+	}
+      break;
+    case SUBREG:
+      print_value (t, SUBREG_REG (x), verbose);
+      cur = safe_concat (buf, cur, t);
+      sprintf (t, "#%d", SUBREG_BYTE (x));
+      cur = safe_concat (buf, cur, t);
+      break;
+    case SCRATCH:
+      cur = safe_concat (buf, cur, "scratch");
+      break;
+    case CC0:
+      cur = safe_concat (buf, cur, "cc0");
+      break;
+    case PC:
+      cur = safe_concat (buf, cur, "pc");
+      break;
+    case MEM:
+      print_value (t, XEXP (x, 0), verbose);
+      cur = safe_concat (buf, cur, "[");
+      cur = safe_concat (buf, cur, t);
+      cur = safe_concat (buf, cur, "]");
+      break;
+    default:
+      print_exp (t, x, verbose);
+      cur = safe_concat (buf, cur, t);
+      break;
+    }
+}				/* print_value */
+
+/* The next step in insn detalization, its pattern recognition.  */
+
+void
+print_pattern (char *buf, const_rtx x, int verbose)
+{
+  char t1[BUF_LEN], t2[BUF_LEN], t3[BUF_LEN];
+
+  switch (GET_CODE (x))
+    {
+    case SET:
+      print_value (t1, SET_DEST (x), verbose);
+      print_value (t2, SET_SRC (x), verbose);
+      sprintf (buf, "%s=%s", t1, t2);
+      break;
+    case RETURN:
+      sprintf (buf, "return");
+      break;
+    case CALL:
+      print_exp (buf, x, verbose);
+      break;
+    case CLOBBER:
+      print_value (t1, XEXP (x, 0), verbose);
+      sprintf (buf, "clobber %s", t1);
+      break;
+    case USE:
+      print_value (t1, XEXP (x, 0), verbose);
+      sprintf (buf, "use %s", t1);
+      break;
+    case COND_EXEC:
+      if (GET_CODE (COND_EXEC_TEST (x)) == NE
+	  && XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
+	print_value (t1, XEXP (COND_EXEC_TEST (x), 0), verbose);
+      else if (GET_CODE (COND_EXEC_TEST (x)) == EQ
+	       && XEXP (COND_EXEC_TEST (x), 1) == const0_rtx)
+	{
+	  t1[0] = '!';
+	  print_value (t1 + 1, XEXP (COND_EXEC_TEST (x), 0), verbose);
+	}
+      else
+	print_value (t1, COND_EXEC_TEST (x), verbose);
+      print_pattern (t2, COND_EXEC_CODE (x), verbose);
+      sprintf (buf, "(%s) %s", t1, t2);
+      break;
+    case PARALLEL:
+      {
+	int i;
+
+	sprintf (t1, "{");
+	for (i = 0; i < XVECLEN (x, 0); i++)
+	  {
+	    print_pattern (t2, XVECEXP (x, 0, i), verbose);
+	    sprintf (t3, "%s%s;", t1, t2);
+	    strcpy (t1, t3);
+	  }
+	sprintf (buf, "%s}", t1);
+      }
+      break;
+    case SEQUENCE:
+      /* Should never see SEQUENCE codes until after reorg.  */
+      gcc_unreachable ();
+    case ASM_INPUT:
+      sprintf (buf, "asm {%s}", XSTR (x, 0));
+      break;
+    case ADDR_VEC:
+      break;
+    case ADDR_DIFF_VEC:
+      print_value (buf, XEXP (x, 0), verbose);
+      break;
+    case TRAP_IF:
+      print_value (t1, TRAP_CONDITION (x), verbose);
+      sprintf (buf, "trap_if %s", t1);
+      break;
+    case UNSPEC:
+      {
+	int i;
+
+	sprintf (t1, "unspec{");
+	for (i = 0; i < XVECLEN (x, 0); i++)
+	  {
+	    print_pattern (t2, XVECEXP (x, 0, i), verbose);
+	    sprintf (t3, "%s%s;", t1, t2);
+	    strcpy (t1, t3);
+	  }
+	sprintf (buf, "%s}", t1);
+      }
+      break;
+    case UNSPEC_VOLATILE:
+      {
+	int i;
+
+	sprintf (t1, "unspec/v{");
+	for (i = 0; i < XVECLEN (x, 0); i++)
+	  {
+	    print_pattern (t2, XVECEXP (x, 0, i), verbose);
+	    sprintf (t3, "%s%s;", t1, t2);
+	    strcpy (t1, t3);
+	  }
+	sprintf (buf, "%s}", t1);
+      }
+      break;
+    default:
+      print_value (buf, x, verbose);
+    }
+}				/* print_pattern */
+
+/* This is the main function in rtl visualization mechanism. It
+   accepts an rtx and tries to recognize it as an insn, then prints it
+   properly in human readable form, resembling assembler mnemonics.
+   For every insn it prints its UID and BB the insn belongs too.
+   (Probably the last "option" should be extended somehow, since it
+   depends now on sched.c inner variables ...)  */
+
+void
+print_insn (char *buf, const_rtx x, int verbose)
+{
+  char t[BUF_LEN];
+  const_rtx insn = x;
+
+  switch (GET_CODE (x))
+    {
+    case INSN:
+      print_pattern (t, PATTERN (x), verbose);
+#ifdef INSN_SCHEDULING
+      if (verbose && current_sched_info)
+	sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (x, 1),
+		 t);
+      else
+#endif
+	sprintf (buf, " %4d %s", INSN_UID (x), t);
+      break;
+    case JUMP_INSN:
+      print_pattern (t, PATTERN (x), verbose);
+#ifdef INSN_SCHEDULING
+      if (verbose && current_sched_info)
+	sprintf (buf, "%s: jump %s", (*current_sched_info->print_insn) (x, 1),
+		 t);
+      else
+#endif
+	sprintf (buf, " %4d %s", INSN_UID (x), t);
+      break;
+    case CALL_INSN:
+      x = PATTERN (insn);
+      if (GET_CODE (x) == PARALLEL)
+	{
+	  x = XVECEXP (x, 0, 0);
+	  print_pattern (t, x, verbose);
+	}
+      else
+	strcpy (t, "call <...>");
+#ifdef INSN_SCHEDULING
+      if (verbose && current_sched_info)
+	sprintf (buf, "%s: %s", (*current_sched_info->print_insn) (insn, 1), t);
+      else
+#endif
+	sprintf (buf, " %4d %s", INSN_UID (insn), t);
+      break;
+    case CODE_LABEL:
+      sprintf (buf, "L%d:", INSN_UID (x));
+      break;
+    case BARRIER:
+      sprintf (buf, "i%4d: barrier", INSN_UID (x));
+      break;
+    case NOTE:
+      sprintf (buf, " %4d %s", INSN_UID (x),
+	       GET_NOTE_INSN_NAME (NOTE_KIND (x)));
+      break;
+    default:
+      sprintf (buf, "i%4d  <What %s?>", INSN_UID (x),
+	       GET_RTX_NAME (GET_CODE (x)));
+    }
+}				/* print_insn */
+
+/* Emit a slim dump of X (an insn) to the file F, including any register
+   note attached to the instruction.  */
+void
+dump_insn_slim (FILE *f, rtx x)
+{
+  char t[BUF_LEN + 32];
+  rtx note;
+
+  print_insn (t, x, 1);
+  fputs (t, f);
+  putc ('\n', f);
+  if (INSN_P (x) && REG_NOTES (x))
+    for (note = REG_NOTES (x); note; note = XEXP (note, 1))
+      {
+        print_value (t, XEXP (note, 0), 1);
+	fprintf (f, "      %s: %s\n",
+		 GET_REG_NOTE_NAME (REG_NOTE_KIND (note)), t);
+      }
+}
+
+/* Emit a slim dump of X (an insn) to stderr.  */
+void
+debug_insn_slim (rtx x)
+{
+  dump_insn_slim (stderr, x);
+}
+
+/* Provide a slim dump the instruction chain starting at FIRST to F, honoring
+   the dump flags given in FLAGS.  Currently, TDF_BLOCKS and TDF_DETAILS
+   include more information on the basic blocks.  */
+void
+print_rtl_slim_with_bb (FILE *f, rtx first, int flags)
+{
+  print_rtl_slim (f, first, NULL, -1, flags);
+}
+
+/* Same as above, but stop at LAST or when COUNT == 0.  
+   If COUNT < 0 it will stop only at LAST or NULL rtx.  */
+void
+print_rtl_slim (FILE *f, rtx first, rtx last, int count, int flags)
+{
+  basic_block current_bb = NULL;
+  rtx insn, tail;
+
+  tail = last ? NEXT_INSN (last) : NULL_RTX;
+  for (insn = first; 
+       (insn != NULL) && (insn != tail) && (count != 0); 
+       insn = NEXT_INSN (insn))
+    {
+      if ((flags & TDF_BLOCKS)
+	  && (INSN_P (insn) || GET_CODE (insn) == NOTE)
+	  && BLOCK_FOR_INSN (insn)
+	  && !current_bb)
+	{
+	  current_bb = BLOCK_FOR_INSN (insn);
+	  dump_bb_info (current_bb, true, false, flags, ";; ", f);
+	}
+
+      dump_insn_slim (f, insn);
+
+      if ((flags & TDF_BLOCKS)
+	  && current_bb
+	  && insn == BB_END (current_bb))
+	{
+	  dump_bb_info (current_bb, false, true, flags, ";; ", f);
+	  current_bb = NULL;
+	}
+      if (count > 0)
+        count--;
+    }
+}
+
+void 
+debug_bb_slim (struct basic_block_def *bb)
+{
+  print_rtl_slim (stderr, BB_HEAD (bb), BB_END (bb), -1, 32);
+}
+
+void
+debug_bb_n_slim (int n)
+{
+  struct basic_block_def *bb = BASIC_BLOCK (n);
+  debug_bb_slim (bb);
+}
+