Disallow negative steps in vectorizer.
gcc/
2010-10-02 H.J. Lu <hongjiu.lu@intel.com>
PR tree-optimization/45720
PR tree-optimization/45764
* tree-vect-data-refs.c (vect_analyze_data_ref_access):
Don't accept backwards consecutive accesses.
(vect_create_data_ref_ptr): Disallow negative steps.
* tree-vect-stmts.c (vectorizable_store): Allow negative steps.
(perm_mask_for_reverse): Removed.
(reverse_vec_elements): Likewise.
(vectorizable_load): Don't hanle negative steps.
gcc/testsuite/
2010-10-02 H.J. Lu <hongjiu.lu@intel.com>
PR tree-optimization/45720
PR tree-optimization/45764
* g++.dg/torture/pr45764.C: New.
* gcc.dg/vect/pr43432.c: Xfail.
* gcc.dg/vect/vect-114.c: Likewise.
* gcc.dg/vect/vect-15.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164914
138bc75d-0d04-0410-961f-
82ee72b054a4