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[Bug target/77881] [5/6/7 Regression] Non-optimal signed comparison on x86_64 since r146817
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 06 Oct 2016 12:25:32 +0000
- Subject: [Bug target/77881] [5/6/7 Regression] Non-optimal signed comparison on x86_64 since r146817
- Auto-submitted: auto-generated
- References: <bug-77881-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77881
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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Keywords| |missed-optimization
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The question is why we expand a < 0 to shift and test in the first place.