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[Bug target/68110] __builtin_sub_overflow unsigned performance issue
- 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: Tue, 27 Oct 2015 09:45:56 +0000
- Subject: [Bug target/68110] __builtin_sub_overflow unsigned performance issue
- Auto-submitted: auto-generated
- References: <bug-68110-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68110
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
value-numbering would need to special-case them via the insertion trick it does
for conversions. somehow. not sure if feasible or worthwhile.