diff options
| author | Richard Guenther <rguenther@suse.de> | 2012-04-03 11:38:04 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2012-04-03 11:38:04 +0000 |
| commit | 07b1bf209c2fa991491ea9317d8afe225dd44f97 (patch) | |
| tree | 89c43a99b22d5e7d34c2934ec55d1719cf2bab3a /gcc/tree-ssa-threadupdate.c | |
| parent | 90b2952fa43b86c74d7ad99893f757abf30788f5 (diff) | |
| download | gcc-07b1bf209c2fa991491ea9317d8afe225dd44f97.zip gcc-07b1bf209c2fa991491ea9317d8afe225dd44f97.tar.gz gcc-07b1bf209c2fa991491ea9317d8afe225dd44f97.tar.bz2 | |
re PR bootstrap/52808 (LTO bootstrap failed with bootstrap-profiled)
2012-04-03 Richard Guenther <rguenther@suse.de>
PR tree-optimization/52808
* tracer.c (tail_duplicate): Return whether we have duplicated
any block.
(tracer): If we have duplicated any block, cleanup the CFG.
* cfghooks.c (duplicate_block): If we duplicated a loop
header but not its loop, destroy the loop because it now has
multiple entries.
* tree-ssa-threadupdate.c (thread_through_loop_header): Tell
the cfg manipulation routines we are not creating a multiple
entry loop.
* gcc.dg/pr52808.c: New testcase.
From-SVN: r186104
Diffstat (limited to 'gcc/tree-ssa-threadupdate.c')
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index 000bd3f..687eee0 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -1004,8 +1004,12 @@ thread_through_loop_header (struct loop *loop, bool may_peel_loop_headers) basic_block *bblocks; unsigned nblocks, i; - /* First handle the case latch edge is redirected. */ + /* First handle the case latch edge is redirected. We are copying + the loop header but not creating a multiple entry loop. Make the + cfg manipulation code aware of that fact. */ + set_loop_copy (loop, loop); loop->latch = thread_single_edge (latch); + set_loop_copy (loop, NULL); gcc_assert (single_succ (loop->latch) == tgt_bb); loop->header = tgt_bb; |