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-rw-r--r--libiberty/ChangeLog6
-rw-r--r--libiberty/hashtab.c23
2 files changed, 28 insertions, 1 deletions
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 00c3089..745a2f4 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,9 @@
+2006-07-27 Jan Hubicka <jh@suse.cz>
+
+ PR rtl-optimization/28071
+ * hashtab.c (htab_empty): Clear out n_deleted/n_elements;
+ downsize the hashtable.
+
2006-07-04 Peter O'Gorman <peter@pogma.com>
* Makefile.in: chmod 644 before ranlib during install.
diff --git a/libiberty/hashtab.c b/libiberty/hashtab.c
index a5671a0..bf34a6d 100644
--- a/libiberty/hashtab.c
+++ b/libiberty/hashtab.c
@@ -421,7 +421,28 @@ htab_empty (htab_t htab)
if (entries[i] != HTAB_EMPTY_ENTRY && entries[i] != HTAB_DELETED_ENTRY)
(*htab->del_f) (entries[i]);
- memset (entries, 0, size * sizeof (PTR));
+ /* Instead of clearing megabyte, downsize the table. */
+ if (size > 1024*1024 / sizeof (PTR))
+ {
+ int nindex = higher_prime_index (1024 / sizeof (PTR));
+ int nsize = prime_tab[nindex].prime;
+
+ if (htab->free_f != NULL)
+ (*htab->free_f) (htab->entries);
+ else if (htab->free_with_arg_f != NULL)
+ (*htab->free_with_arg_f) (htab->alloc_arg, htab->entries);
+ if (htab->alloc_with_arg_f != NULL)
+ htab->entries = (PTR *) (*htab->alloc_with_arg_f) (htab->alloc_arg, nsize,
+ sizeof (PTR *));
+ else
+ htab->entries = (PTR *) (*htab->alloc_f) (nsize, sizeof (PTR *));
+ htab->size = nsize;
+ htab->size_prime_index = nindex;
+ }
+ else
+ memset (entries, 0, size * sizeof (PTR));
+ htab->n_deleted = 0;
+ htab->n_elements = 0;
}
/* Similar to htab_find_slot, but without several unwanted side effects: