2008-08-15 Richard Guenther <rguenther@suse.de>

	* tree-ssa-ccp.c (maybe_fold_offset_to_reference): Do not
	strip components for unknown size accesses.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@139129 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d25df32..d823e22 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2008-08-15  Richard Guenther  <rguenther@suse.de>
+
+       * tree-ssa-ccp.c (maybe_fold_offset_to_reference): Do not
+       strip components for unknown size accesses.
+
 2008-08-15  Wolfgang Gellerich  <gellerich@de.ibm.com>
 
        * config/s390/2097.md New file.

diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c
index ff8af4f..2e34bd9 100644 (file)
--- a/gcc/tree-ssa-ccp.c
+++ b/gcc/tree-ssa-ccp.c
@@ -1976,6 +1976,7 @@ maybe_fold_offset_to_reference (tree base, tree offset, tree orig_type)
                                             &size, &maxsize);
          gcc_assert (newbase);
          if (size == maxsize
+             && size != -1
              && !(sub_offset & (BITS_PER_UNIT - 1)))
            {
              base = newbase;