2012-08-17 Richard Guenther <rguenther@suse.de>

	* params.def (integer-share-limit): Decrease from 256 to 251,
	add rationale.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@190470 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a90ec55..effbb41 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2012-08-17  Richard Guenther  <rguenther@suse.de>
 
+       * params.def (integer-share-limit): Decrease from 256 to 251,
+       add rationale.
+
+2012-08-17  Richard Guenther  <rguenther@suse.de>
+
        * tree-sra.c (modify_function): Free redirect_callers vector.
        * ipa-split.c (split_function): Free args_to_pass vector.
        * tree-vect-data-refs.c (vect_peeling_hash_get_lowest_cost): Free

diff --git a/gcc/params.def b/gcc/params.def
index efa6860..cd8cb22 100644 (file)
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -638,11 +638,12 @@ DEFPARAM(PARAM_MAX_LAST_VALUE_RTL,
 
 /* INTEGER_CST nodes are shared for values [{-1,0} .. N) for
    {signed,unsigned} integral types.  This determines N.
-   Experimentation shows 256 to be a good value.  */
+   Experimentation shows 251 to be a good value that generates the
+   least amount of garbage for allocating the TREE_VEC storage.  */
 DEFPARAM (PARAM_INTEGER_SHARE_LIMIT,
          "integer-share-limit",
          "The upper bound for sharing integer constants",
-         256, 2, 2)
+         251, 2, 2)
 
 DEFPARAM (PARAM_SSP_BUFFER_SIZE,
          "ssp-buffer-size",