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| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-06-24 10:22:22 +0000 |
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| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-06-24 10:22:22 +0000 |
| commit | 5f751b2046c3e0987044e4e4c73e42c2b42a769f (patch) | |
| tree | a40cd40d70e99d651b36e5b81eefc95c7b9e7bc2 /gcc/tree-ssa-pre.c | |
| parent | ef1adaf25d934c25a54e5bde2b7b05e10d76060a (diff) | |
| download | gcc-5f751b2046c3e0987044e4e4c73e42c2b42a769f.tar.gz | |
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200363 138bc75d-0d04-0410-961f-82ee72b054a4
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 345ebcceaad..642a343afe8 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); } |