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| author | Richard Biener <rguenther@suse.de> | 2017-10-23 11:14:40 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-10-23 11:14:40 +0000 |
| commit | 0524367e2aa8f4e021a719f5fcfab642dfe62dcb (patch) | |
| tree | 414a95aaa8dba5d46f3e33f344a5aba398146f5f /gcc/tree-ssa-pre.c | |
| parent | 908d1d3aeaf1a40d9308dc09aac6e94d78991af1 (diff) | |
| download | gcc-0524367e2aa8f4e021a719f5fcfab642dfe62dcb.zip gcc-0524367e2aa8f4e021a719f5fcfab642dfe62dcb.tar.gz gcc-0524367e2aa8f4e021a719f5fcfab642dfe62dcb.tar.bz2 | |
re PR tree-optimization/82129 (ICE in compute_antic, at tree-ssa-pre.c:2447)
2017-10-23 Richard Biener <rguenther@suse.de>
PR tree-optimization/82129
Revert
2017-08-01 Richard Biener <rguenther@suse.de>
PR tree-optimization/81181
* tree-ssa-pre.c (compute_antic_aux): Defer clean() to ...
(compute_antic): ... end of iteration here.
From-SVN: r254005
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 4861a4c..cad7934 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -2082,8 +2082,7 @@ static sbitmap has_abnormal_preds; ANTIC_OUT[BLOCK] = phi_translate (ANTIC_IN[succ(BLOCK)]) ANTIC_IN[BLOCK] = clean(ANTIC_OUT[BLOCK] U EXP_GEN[BLOCK] - TMP_GEN[BLOCK]) - - Note that clean() is deferred until after the iteration. */ +*/ static bool compute_antic_aux (basic_block block, bool block_has_abnormal_pred_edge) @@ -2219,8 +2218,7 @@ compute_antic_aux (basic_block block, bool block_has_abnormal_pred_edge) bitmap_value_insert_into_set (ANTIC_IN (block), expression_for_id (bii)); - /* clean (ANTIC_IN (block)) is defered to after the iteration converged - because it can cause non-convergence, see for example PR81181. */ + clean (ANTIC_IN (block)); if (!bitmap_set_equal (old, ANTIC_IN (block))) changed = true; @@ -2453,12 +2451,6 @@ compute_antic (void) gcc_checking_assert (num_iterations < 500); } - /* We have to clean after the dataflow problem converged as cleaning - can cause non-convergence because it is based on expressions - rather than values. */ - FOR_EACH_BB_FN (block, cfun) - clean (ANTIC_IN (block)); - statistics_histogram_event (cfun, "compute_antic iterations", num_iterations); |