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[Bug tree-optimization/28029] [4.1 Regression] wrong optimization with -ftree-vectorize
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Jul 2006 11:00:33 -0000
- Subject: [Bug tree-optimization/28029] [4.1 Regression] wrong optimization with -ftree-vectorize
- References: <bug-28029-12708@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from rguenth at gcc dot gnu dot org 2006-07-21 11:00 -------
Backporting
Author: dberlin
Date: Wed Feb 15 22:09:45 2006
New Revision: 111120
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=111120
Log:
2006-02-15 Daniel Berlin <dberlin@dberlin.org>
...
* tree-ssa-alias.c (get_tmt_for): Don't handle TYPE_READONLY
specially here.
...
causes this problem to go away. For reference:
Index: gcc/tree-ssa-alias.c
===================================================================
--- gcc/tree-ssa-alias.c (revision 115613)
+++ gcc/tree-ssa-alias.c (working copy)
@@ -1818,8 +1818,7 @@ get_tmt_for (tree ptr, struct alias_info
{
struct alias_map_d *curr = ai->pointers[i];
tree curr_tag = var_ann (curr->var)->type_mem_tag;
- if (tag_set == curr->set
- && TYPE_READONLY (tag_type) == TYPE_READONLY (TREE_TYPE (curr_tag)))
+ if (tag_set == curr->set)
{
tag = curr_tag;
break;
@@ -1856,10 +1855,6 @@ get_tmt_for (tree ptr, struct alias_info
pointed-to type. */
gcc_assert (tag_set == get_alias_set (tag));
- /* If PTR's pointed-to type is read-only, then TAG's type must also
- be read-only. */
- gcc_assert (TYPE_READONLY (tag_type) == TYPE_READONLY (TREE_TYPE (tag)));
-
return tag;
}
I'm going to bootstrap and test that backport.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2006-07-10 13:24:57 |2006-07-21 11:00:32
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28029