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| author | Richard Biener <rguenther@suse.de> | 2016-08-18 10:06:03 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-08-18 10:06:03 +0000 |
| commit | f9d97e407ff87e930c40d27f37e666fa4db79643 (patch) | |
| tree | 8ed809f4dff007e9b63483c33e6490b5dcb079ca | |
| parent | 6cb984919944d6a622c459140301ab11a850aa64 (diff) | |
| download | gcc-f9d97e407ff87e930c40d27f37e666fa4db79643.zip gcc-f9d97e407ff87e930c40d27f37e666fa4db79643.tar.gz gcc-f9d97e407ff87e930c40d27f37e666fa4db79643.tar.bz2 | |
re PR tree-optimization/77282 (test case gcc.dg/autopar/pr46193.c fails starting with r239414)
2016-08-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/77282
* tree-ssa-pre.c (eliminate_dom_walker::before_dom_children):
When doing auto-parallelizing also prevent use of PHIs that
carry dependences across loop backedges.
From-SVN: r239565
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/tree-ssa-pre.c | 2 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5d89dbb..20c5d58 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2016-08-18 Richard Biener <rguenther@suse.de> + + PR tree-optimization/77282 + * tree-ssa-pre.c (eliminate_dom_walker::before_dom_children): + When doing auto-parallelizing also prevent use of PHIs that + carry dependences across loop backedges. + 2016-08-18 Tamar Christina <tamar.christina@arm.com> Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 5d21c80..b1e869b 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4270,7 +4270,7 @@ eliminate_dom_walker::before_dom_children (basic_block b) if (sprime && TREE_CODE (sprime) == SSA_NAME && do_pre - && flag_tree_loop_vectorize + && (flag_tree_loop_vectorize || flag_tree_parallelize_loops) && loop_outer (b->loop_father) && has_zero_uses (sprime) && bitmap_bit_p (inserted_exprs, SSA_NAME_VERSION (sprime)) |