diff options
| author | hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-10-03 05:39:32 +0000 |
|---|---|---|
| committer | hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4> | 2010-10-03 05:39:32 +0000 |
| commit | 3055f3ce13571287e98cfaa37cacc6cb8ac76890 (patch) | |
| tree | fd1eea306f2f5ca977aaaa32728dc316b851f9d6 /gcc/tree-vect-data-refs.c | |
| parent | 84dbdb74655cc9ebb0707226f53491cc3fb794ef (diff) | |
| download | gcc-3055f3ce13571287e98cfaa37cacc6cb8ac76890.tar.gz | |
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
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 71825137cd7..0d1e3381738 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -2287,9 +2287,7 @@ vect_analyze_data_ref_access (struct data_reference *dr) } /* Consecutive? */ - if (!tree_int_cst_compare (step, TYPE_SIZE_UNIT (scalar_type)) - || (dr_step < 0 - && !compare_tree_int (TYPE_SIZE_UNIT (scalar_type), -dr_step))) + if (!tree_int_cst_compare (step, TYPE_SIZE_UNIT (scalar_type))) { /* Mark that it is not interleaving. */ DR_GROUP_FIRST_DR (vinfo_for_stmt (stmt)) = NULL; @@ -2972,7 +2970,6 @@ vect_create_data_ref_ptr (gimple stmt, struct loop *at_loop, tree vptr; gimple_stmt_iterator incr_gsi; bool insert_after; - bool negative; tree indx_before_incr, indx_after_incr; gimple incr; tree step; @@ -3005,7 +3002,6 @@ vect_create_data_ref_ptr (gimple stmt, struct loop *at_loop, *inv_p = true; else *inv_p = false; - negative = tree_int_cst_compare (step, size_zero_node) < 0; /* Create an expression for the first address accessed by this load in LOOP. */ @@ -3164,8 +3160,6 @@ vect_create_data_ref_ptr (gimple stmt, struct loop *at_loop, LOOP is zero. In this case the step here is also zero. */ if (*inv_p) step = size_zero_node; - else if (negative) - step = fold_build1 (NEGATE_EXPR, TREE_TYPE (step), step); standard_iv_increment_position (loop, &incr_gsi, &insert_after); |