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[Bug middle-end/81596] backwards threader misses simple copy within the same BB
- From: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 15 Aug 2017 03:11:57 +0000
- Subject: [Bug middle-end/81596] backwards threader misses simple copy within the same BB
- Auto-submitted: auto-generated
- References: <bug-81596-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81596
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
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CC| |law at redhat dot com
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Jump threading is a fairly high overhead solution for this problem. Simple
const/copy propagation is a better solution in cases like this IMHO.
The overhead could be reduced with some changes to the updating algorithm that
I want to implement, but haven't yet. So perhaps keep it open as a low
priority issue.