This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug target/68110] __builtin_sub_overflow unsigned performance issue
- From: "pinskia 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 05:19:14 +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 #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So the question is does anyone use this function without "a - b" later on? If
not then it is just a microbenchmark of this code is showing the regression and
I would say the microbenchmark is wrong.