obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 153 insertions, 0 deletions

diff --git a/gcc/dbgcnt.c b/gcc/dbgcnt.c
new file mode 100644
index 000000000..fa46ed8a6
--- /dev/null
+++ b/gcc/dbgcnt.c
@@ -0,0 +1,153 @@
+/* Debug counter for debugging support
+   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+
+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/>.
+
+See dbgcnt.def for usage information.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "diagnostic-core.h"
+#include "tm.h"
+#include "rtl.h"
+#include "output.h"
+
+#include "dbgcnt.h"
+
+struct string2counter_map {
+  const char *name;
+  enum debug_counter counter;
+};
+
+#define DEBUG_COUNTER(a) { #a , a },
+
+static struct string2counter_map map[debug_counter_number_of_counters] =
+{
+#include "dbgcnt.def"
+};
+#undef DEBUG_COUNTER
+
+#define DEBUG_COUNTER(a) UINT_MAX,
+static unsigned int limit[debug_counter_number_of_counters] =
+{
+#include "dbgcnt.def"
+};
+#undef DEBUG_COUNTER
+
+static unsigned int count[debug_counter_number_of_counters];
+
+bool
+dbg_cnt_is_enabled (enum debug_counter index)
+{
+  return count[index] <= limit[index];
+}
+
+bool
+dbg_cnt (enum debug_counter index)
+{
+  count[index]++;
+  if (dump_file && count[index] == limit[index])
+    fprintf (dump_file, "***dbgcnt: limit reached for %s.***\n",
+	     map[index].name);
+
+  return dbg_cnt_is_enabled (index);
+}
+
+
+static void
+dbg_cnt_set_limit_by_index (enum debug_counter index, int value)
+{
+  limit[index] = value;
+
+  fprintf (stderr, "dbg_cnt '%s' set to %d\n", map[index].name, value);
+}
+
+static bool
+dbg_cnt_set_limit_by_name (const char *name, int len, int value)
+{
+  int i;
+  for (i = debug_counter_number_of_counters - 1; i >= 0; i--)
+    if (strncmp (map[i].name, name, len) == 0
+        && map[i].name[len] == '\0')
+      break;
+
+  if (i < 0)
+    return false;
+
+  dbg_cnt_set_limit_by_index ((enum debug_counter) i, value);
+  return true;
+}
+
+
+/* Process a single "name:value" pair.
+   Returns NULL if there's no valid pair is found.
+   Otherwise returns a pointer to the end of the pair. */
+
+static const char *
+dbg_cnt_process_single_pair (const char *arg)
+{
+   const char *colon = strchr (arg, ':');
+   char *endptr = NULL;
+   int value;
+
+   if (colon == NULL)
+     return NULL;
+
+   value = strtol (colon + 1, &endptr, 10);
+
+   if (endptr != NULL && endptr != colon + 1
+       && dbg_cnt_set_limit_by_name (arg, colon - arg, value))
+     return endptr;
+
+   return NULL;
+}
+
+void
+dbg_cnt_process_opt (const char *arg)
+{
+   const char *start = arg;
+   const char *next;
+   do {
+     next = dbg_cnt_process_single_pair (arg);
+     if (next == NULL)
+       break;
+   } while (*next == ',' && (arg = next + 1));
+
+   if (next == NULL || *next != 0)
+     {
+       char *buffer = XALLOCAVEC (char, arg - start + 2);
+       sprintf (buffer, "%*c", (int)(1 + (arg - start)), '^');
+       error ("cannot find a valid counter:value pair:");
+       error ("-fdbg-cnt=%s", start);
+       error ("          %s", buffer);
+     }
+}
+
+/* Print name, limit and count of all counters.   */
+
+void
+dbg_cnt_list_all_counters (void)
+{
+  int i;
+  printf ("  %-30s %-5s %-5s\n", "counter name",  "limit", "value");
+  printf ("----------------------------------------------\n");
+  for (i = 0; i < debug_counter_number_of_counters; i++)
+    printf ("  %-30s %5d %5u\n",
+            map[i].name, limit[map[i].counter], count[map[i].counter]);
+  printf ("\n");
+}