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[Bug tree-optimization/52424] dom prematurely pops entries from const_and_copies stack
- From: "jiangning.liu at arm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 29 Feb 2012 03:23:46 +0000
- Subject: [Bug tree-optimization/52424] dom prematurely pops entries from const_and_copies stack
- Auto-submitted: auto-generated
- References: <bug-52424-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52424
--- Comment #1 from Jiangning Liu <jiangning.liu at arm dot com> 2012-02-29 03:23:46 UTC ---
> I've attached a proposed fix. Jiangning, can you please apply this and see if
> your performance problem is resolved?
Bill,
Confirmed, I think your patch works for my big case and I do see the redundant
copies are removed from final binary code. Benchmark performance boosts
accordingly as well, although there still might be other potential problems.
Thanks a lot for your quick patch. And are you going to check-in to trunk soon
for 4.7? It would be also better if you can add a test case.
-Jiangning