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| author | Daniel Berlin <dberlin@dberlin.org> | 2004-11-10 21:32:10 +0000 |
|---|---|---|
| committer | Daniel Berlin <dberlin@gcc.gnu.org> | 2004-11-10 21:32:10 +0000 |
| commit | 8b41b1b24fa17fc41a28c4466b1dcd8d9fdcb170 (patch) | |
| tree | 04e059bd31757c6683315f9d6855e4478975f882 /gcc/tree-data-ref.c | |
| parent | 78e54994ff2b5b5c716269ea2e47d021362aea9c (diff) | |
| download | gcc-8b41b1b24fa17fc41a28c4466b1dcd8d9fdcb170.zip gcc-8b41b1b24fa17fc41a28c4466b1dcd8d9fdcb170.tar.gz gcc-8b41b1b24fa17fc41a28c4466b1dcd8d9fdcb170.tar.bz2 | |
tree-data-ref.c (build_classic_dist_vector): If either loop is outside of the nest we asked about, the dependence can't matter.
2004-11-10 Daniel Berlin <dberlin@dberlin.org>
* tree-data-ref.c (build_classic_dist_vector): If either loop
is outside of the nest we asked about, the dependence can't
matter.
(build_classic_dir_vector): Ditto.
From-SVN: r90454
Diffstat (limited to 'gcc/tree-data-ref.c')
| -rw-r--r-- | gcc/tree-data-ref.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c index 9a0126c..3c88346 100644 --- a/gcc/tree-data-ref.c +++ b/gcc/tree-data-ref.c @@ -1816,12 +1816,12 @@ build_classic_dist_vector (struct data_dependence_relation *ddr, struct loop *loop_b = current_loops->parray[loop_nb_b]; struct loop *loop_first = current_loops->parray[first_loop]; - /* If the loops for both variables are at a lower depth than - the first_loop's depth, then they can't possibly have a + /* If the loop for either variable is at a lower depth than + the first_loop's depth, then we can't possibly have a dependency at this level of the loop. */ if (loop_a->depth < loop_first->depth - && loop_b->depth < loop_first->depth) + || loop_b->depth < loop_first->depth) return false; if (loop_nb_a != loop_nb_b @@ -1992,11 +1992,12 @@ build_classic_dir_vector (struct data_dependence_relation *ddr, struct loop *loop_b = current_loops->parray[loop_nb_b]; struct loop *loop_first = current_loops->parray[first_loop]; - /* If the loops for both variables are at a lower depth than - the first_loop's depth, then they can't possibly matter */ + /* If the loop for either variable is at a lower depth than + the first_loop's depth, then we can't possibly have a + dependency at this level of the loop. */ if (loop_a->depth < loop_first->depth - && loop_b->depth < loop_first->depth) + || loop_b->depth < loop_first->depth) return false; if (loop_nb_a != loop_nb_b |