rebase

From-SVN: r177571

1 files changed, 207 insertions, 0 deletions

diff --git a/gcc/data-streamer-out.c b/gcc/data-streamer-out.c
new file mode 100644
index 00000000000..07d5b35fba3
--- /dev/null
+++ b/gcc/data-streamer-out.c
@@ -0,0 +1,207 @@
+/* Routines for saving various data types to a file stream.  This deals
+   with various data types like strings, integers, enums, etc.
+
+   Copyright 2011 Free Software Foundation, Inc.
+   Contributed by Diego Novillo <dnovillo@google.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 "data-streamer.h"
+
+/* Return index used to reference STRING of LEN characters in the string table
+   in OB.  The string might or might not include a trailing '\0'.
+   Then put the index onto the INDEX_STREAM.  
+   When PERSISTENT is set, the string S is supposed to not change during
+   duration of the OB and thus OB can keep pointer into it.  */
+
+unsigned
+lto_string_index (struct output_block *ob, const char *s, unsigned int len,
+		  bool persistent)
+{
+  struct string_slot **slot;
+  struct string_slot s_slot;
+
+  s_slot.s = s;
+  s_slot.len = len;
+  s_slot.slot_num = 0;
+
+  slot = (struct string_slot **) htab_find_slot (ob->string_hash_table,
+						 &s_slot, INSERT);
+  if (*slot == NULL)
+    {
+      struct lto_output_stream *string_stream = ob->string_stream;
+      unsigned int start = string_stream->total_size;
+      struct string_slot *new_slot = XOBNEW (&ob->obstack, struct string_slot);
+      const char *string;
+
+      if (!persistent)
+	{
+	  char *tmp;
+	  string = tmp = XOBNEWVEC (&ob->obstack, char, len);
+          memcpy (tmp, s, len);
+        }
+      else
+	string = s;
+
+      new_slot->s = string;
+      new_slot->len = len;
+      new_slot->slot_num = start;
+      *slot = new_slot;
+      lto_output_uleb128_stream (string_stream, len);
+      lto_output_data_stream (string_stream, string, len);
+      return start + 1;
+    }
+  else
+    {
+      struct string_slot *old_slot = *slot;
+      return old_slot->slot_num + 1;
+    }
+}
+
+
+/* Output STRING of LEN characters to the string table in OB. The
+   string might or might not include a trailing '\0'. Then put the
+   index onto the INDEX_STREAM. 
+   When PERSISTENT is set, the string S is supposed to not change during
+   duration of the OB and thus OB can keep pointer into it.  */
+
+void
+lto_output_string_with_length (struct output_block *ob,
+			       struct lto_output_stream *index_stream,
+			       const char *s, unsigned int len, bool persistent)
+{
+  if (s)
+    lto_output_uleb128_stream (index_stream,
+			       lto_string_index (ob, s, len, persistent));
+  else
+    lto_output_1_stream (index_stream, 0);
+}
+
+
+/* Output the '\0' terminated STRING to the string
+   table in OB.  Then put the index onto the INDEX_STREAM.
+   When PERSISTENT is set, the string S is supposed to not change during
+   duration of the OB and thus OB can keep pointer into it.  */
+
+void
+lto_output_string (struct output_block *ob,
+	           struct lto_output_stream *index_stream,
+	           const char *string, bool persistent)
+{
+  if (string)
+    lto_output_string_with_length (ob, index_stream, string,
+				   strlen (string) + 1,
+				   persistent);
+  else
+    lto_output_1_stream (index_stream, 0);
+}
+
+
+/* Write a zero to the output stream.  */
+
+void
+output_zero (struct output_block *ob)
+{
+  lto_output_1_stream (ob->main_stream, 0);
+}
+
+
+/* Output an unsigned LEB128 quantity to OB->main_stream.  */
+
+void
+output_uleb128 (struct output_block *ob, unsigned HOST_WIDE_INT work)
+{
+  lto_output_uleb128_stream (ob->main_stream, work);
+}
+
+
+/* Output a signed LEB128 quantity to OB->main_stream.  */
+
+void
+output_sleb128 (struct output_block *ob, HOST_WIDE_INT work)
+{
+  lto_output_sleb128_stream (ob->main_stream, work);
+}
+
+
+/* Output an unsigned LEB128 quantity to OBS.  */
+
+void
+lto_output_uleb128_stream (struct lto_output_stream *obs,
+			   unsigned HOST_WIDE_INT work)
+{
+  do
+    {
+      unsigned int byte = (work & 0x7f);
+      work >>= 7;
+      if (work != 0)
+	/* More bytes to follow.  */
+	byte |= 0x80;
+
+      lto_output_1_stream (obs, byte);
+    }
+  while (work != 0);
+}
+
+
+/* Identical to output_uleb128_stream above except using unsigned
+   HOST_WIDEST_INT type.  For efficiency on host where unsigned HOST_WIDEST_INT
+   is not native, we only use this if we know that HOST_WIDE_INT is not wide
+   enough.  */
+
+void
+lto_output_widest_uint_uleb128_stream (struct lto_output_stream *obs,
+				       unsigned HOST_WIDEST_INT work)
+{
+  do
+    {
+      unsigned int byte = (work & 0x7f);
+      work >>= 7;
+      if (work != 0)
+	/* More bytes to follow.  */
+	byte |= 0x80;
+
+      lto_output_1_stream (obs, byte);
+    }
+  while (work != 0);
+}
+
+
+/* Output a signed LEB128 quantity.  */
+
+void
+lto_output_sleb128_stream (struct lto_output_stream *obs, HOST_WIDE_INT work)
+{
+  int more, byte;
+
+  do
+    {
+      byte = (work & 0x7f);
+      /* arithmetic shift */
+      work >>= 7;
+      more = !((work == 0 && (byte & 0x40) == 0)
+	       || (work == -1 && (byte & 0x40) != 0));
+      if (more)
+	byte |= 0x80;
+
+      lto_output_1_stream (obs, byte);
+    }
+  while (more);
+}