X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fstringpool.c;h=747db177b2abcf1b76aa49ee9e6187952ea4cc62;hb=fe10f73e500e04b2006cdcfd1349e93dfdcebd0e;hp=0227688f6e176b723c0f863ee6db3f3e55af14ff;hpb=c39ed964c8cd9aec2fe6060830804416b0856b60;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/stringpool.c b/gcc/stringpool.c
index 0227688f6e1..747db177b2a 100644
--- a/gcc/stringpool.c
+++ b/gcc/stringpool.c
@@ -1,11 +1,12 @@
 /* String pool for GCC.
-   Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 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 2, or (at your option) any later
+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
@@ -14,13 +15,11 @@ 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 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/>.  */
 
-/* String text, identifier text and identifier node allocator.  Strings
-   allocated by ggc_alloc_string are stored in an obstack which is
-   never shrunk.  Identifiers are uniquely stored in a hash table.
+/* String text, identifier text and identifier node allocator.
+   Identifiers are uniquely stored in a hash table.
 
    We use cpplib's hash table implementation.  libiberty's
    hashtab.c is not used because it requires 100% average space
@@ -30,8 +29,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "config.h"
 #include "system.h"
 #include "coretypes.h"
-#include "tm.h"
 #include "ggc.h"
+#include "ggc-internal.h"
 #include "tree.h"
 #include "symtab.h"
 #include "cpplib.h"
@@ -41,13 +40,14 @@ const char empty_string[] = "";
 
 /* Character strings, each containing a single decimal digit.
    Written this way to save space.  */
-const char digit_vector[] = {
+static const char digit_vector[] = {
   '0', 0, '1', 0, '2', 0, '3', 0, '4', 0,
   '5', 0, '6', 0, '7', 0, '8', 0, '9', 0
 };
 
+#define digit_string(d) (digit_vector + ((d) * 2))
+
 struct ht *ident_hash;
-static struct obstack string_stack;
 
 static hashnode alloc_node (hash_table *);
 static int mark_ident (struct cpp_reader *, hashnode, const void *);
@@ -55,7 +55,7 @@ static int mark_ident (struct cpp_reader *, hashnode, const void *);
 static void *
 stringpool_ggc_alloc (size_t x)
 {
-  return ggc_alloc (x);
+  return ggc_alloc_atomic (x);
 }
 
 /* Initialize the string pool.  */
@@ -66,7 +66,6 @@ init_stringpool (void)
   ident_hash = ht_create (14);
   ident_hash->alloc_node = alloc_node;
   ident_hash->alloc_subobject = stringpool_ggc_alloc;
-  gcc_obstack_init (&string_stack);
 }
 
 /* Allocate a hash node.  */
@@ -78,13 +77,13 @@ alloc_node (hash_table *table ATTRIBUTE_UNUSED)
 
 /* Allocate and return a string constant of length LENGTH, containing
    CONTENTS.  If LENGTH is -1, CONTENTS is assumed to be a
-   nul-terminated string, and the length is calculated using strlen.
-   If the same string constant has been allocated before, that copy is
-   returned this time too.  */
+   nul-terminated string, and the length is calculated using strlen.  */
 
 const char *
-ggc_alloc_string (const char *contents, int length)
+ggc_alloc_string_stat (const char *contents, int length MEM_STAT_DECL)
 {
+  char *result;
+
   if (length == -1)
     length = strlen (contents);
 
@@ -93,8 +92,10 @@ ggc_alloc_string (const char *contents, int length)
   if (length == 1 && ISDIGIT (contents[0]))
     return digit_string (contents[0] - '0');
 
-  obstack_grow0 (&string_stack, contents, length);
-  return obstack_finish (&string_stack);
+  result = (char *) ggc_alloc_atomic_stat (length + 1 PASS_MEM_STAT);
+  memcpy (result, contents, length);
+  result[length] = '\0';
+  return (const char *) result;
 }
 
 /* Return an IDENTIFIER_NODE whose name is TEXT (a null-terminated string).
@@ -163,9 +164,18 @@ mark_ident (struct cpp_reader *pfile ATTRIBUTE_UNUSED, hashnode h,
   return 1;
 }
 
+/* Return true if an identifier should be removed from the table.  */
+
+static int
+maybe_delete_ident (struct cpp_reader *pfile ATTRIBUTE_UNUSED, hashnode h,
+		    const void *v ATTRIBUTE_UNUSED)
+{
+  return !ggc_marked_p (HT_IDENT_TO_GCC_IDENT (h));
+}
+
 /* Mark the trees hanging off the identifier node for GGC.  These are
-   handled specially (not using gengtype) because of the special
-   treatment for strings.  */
+   handled specially (not using gengtype) because identifiers are only
+   roots during one part of compilation.  */
 
 void
 ggc_mark_stringpool (void)
@@ -173,13 +183,13 @@ ggc_mark_stringpool (void)
   ht_forall (ident_hash, mark_ident, NULL);
 }
 
-/* Strings are _not_ GCed, but this routine exists so that a separate
-   roots table isn't needed for the few global variables that refer
-   to strings.  */
+/* Purge the identifier hash of identifiers which are no longer
+   referenced.  */
 
 void
-gt_ggc_m_S (void *x ATTRIBUTE_UNUSED)
+ggc_purge_stringpool (void)
 {
+  ht_purge (ident_hash, maybe_delete_ident, NULL);
 }
 
 /* Pointer-walking routine for strings (not very interesting, since
@@ -197,7 +207,8 @@ gt_pch_p_S (void *obj ATTRIBUTE_UNUSED, void *x ATTRIBUTE_UNUSED,
 void
 gt_pch_n_S (const void *x)
 {
-  gt_pch_note_object ((void *)x, (void *)x, &gt_pch_p_S);
+  gt_pch_note_object (CONST_CAST (void *, x), CONST_CAST (void *, x),
+		      &gt_pch_p_S, gt_types_enum_last);
 }
 
 /* Handle saving and restoring the string pool for PCH.  */
@@ -205,9 +216,8 @@ gt_pch_n_S (const void *x)
 /* SPD is saved in the PCH file and holds the information needed
    to restore the string pool.  */
 
-struct string_pool_data GTY(())
-{
-  struct ht_identifier * * 
+struct GTY(()) string_pool_data {
+  ht_identifier_ptr *
     GTY((length ("%h.nslots"),
 	 nested_ptr (union tree_node, "%h ? GCC_IDENT_TO_HT_IDENT (%h) : NULL",
 		     "%h ? HT_IDENT_TO_GCC_IDENT (%h) : NULL")))
@@ -223,10 +233,10 @@ static GTY(()) struct string_pool_data * spd;
 void
 gt_pch_save_stringpool (void)
 {
-  spd = ggc_alloc (sizeof (*spd));
+  spd = ggc_alloc_string_pool_data ();
   spd->nslots = ident_hash->nslots;
   spd->nelements = ident_hash->nelements;
-  spd->entries = ggc_alloc (sizeof (spd->entries[0]) * spd->nslots);
+  spd->entries = ggc_alloc_vec_ht_identifier_ptr (spd->nslots);
   memcpy (spd->entries, ident_hash->entries,
 	  spd->nslots * sizeof (spd->entries[0]));
 }