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| author | Richard Biener <rguenther@suse.de> | 2013-06-24 10:22:22 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2013-06-24 10:22:22 +0000 |
| commit | 3dbc97a91e0151bdbe4749b2e8fc427f3fb687e0 (patch) | |
| tree | a40cd40d70e99d651b36e5b81eefc95c7b9e7bc2 /gcc/tree-ssa-pre.c | |
| parent | 03a8a2d57d28617d60d499a359a60a3258144065 (diff) | |
| download | gcc-3dbc97a91e0151bdbe4749b2e8fc427f3fb687e0.zip gcc-3dbc97a91e0151bdbe4749b2e8fc427f3fb687e0.tar.gz gcc-3dbc97a91e0151bdbe4749b2e8fc427f3fb687e0.tar.bz2 | |
re PR tree-optimization/57488 (loop terminates early at -O3)
2013-06-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/57488
* tree-ssa-pre.c (insert): Clear NEW sets before each iteration.
* gcc.dg/torture/pr57488.c: New testcase.
From-SVN: r200363
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 345ebcc..642a343 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -3665,6 +3665,12 @@ insert (void) if (dump_file && dump_flags & TDF_DETAILS) fprintf (dump_file, "Starting insert iteration %d\n", num_iterations); new_stuff = insert_aux (ENTRY_BLOCK_PTR); + + /* Clear the NEW sets before the next iteration. We have already + fully propagated its contents. */ + if (new_stuff) + FOR_ALL_BB (bb) + bitmap_set_free (NEW_SETS (bb)); } statistics_histogram_event (cfun, "insert iterations", num_iterations); } |