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| author | Richard Biener <rguenther@suse.de> | 2016-04-19 13:22:19 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-04-19 13:22:19 +0000 |
| commit | 65f52ee9b978858ed791162f29a04f2cbcef6dbc (patch) | |
| tree | c229c8622615d24353d0e083b34905437310e60f /gcc/tree-ssa-pre.c | |
| parent | 27b95a65410ccb700752c8178fd19f1485a4b5bf (diff) | |
| download | gcc-65f52ee9b978858ed791162f29a04f2cbcef6dbc.zip gcc-65f52ee9b978858ed791162f29a04f2cbcef6dbc.tar.gz gcc-65f52ee9b978858ed791162f29a04f2cbcef6dbc.tar.bz2 | |
re PR tree-optimization/70724 (Miscompiles python3 with FDO)
2016-04-19 Richard Biener <rguenther@suse.de>
PR tree-optimization/70724
* tree-ssa-sccvn.c (scc_vn_restore_ssa_info): Split SSA info
restoring out from ...
(free_scc_vn): ... here.
* tree-ssa-sccvn.h (scc_vn_restore_ssa_info): Declare.
* tres-ssa-pre.c (pass_pre::execute): Restore SSA info before
tail merging.
(pass_fre::execute): Restore SSA info.
* gcc.dg/torture/pr70724.c: New testcase.
From-SVN: r235203
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index c0e3b80..2d1eb70 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4804,6 +4804,9 @@ pass_pre::execute (function *fun) todo |= fini_eliminate (); loop_optimizer_finalize (); + /* Restore SSA info before tail-merging as that resets it as well. */ + scc_vn_restore_ssa_info (); + /* TODO: tail_merge_optimize may merge all predecessors of a block, in which case we can merge the block with the remaining predecessor of the block. It should either: @@ -4877,6 +4880,7 @@ pass_fre::execute (function *fun) todo |= fini_eliminate (); + scc_vn_restore_ssa_info (); free_scc_vn (); statistics_counter_event (fun, "Insertions", pre_stats.insertions); |