[Bug tree-optimization/114281] [14 Regression] Multiple 2-10% exec time regressions of 465.tonto since r14-9193-ga0b1798042d033

["xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114281

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE
                 CC|                            |xry111 at gcc dot gnu.org

--- Comment #1 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to Filip Kastl from comment #0)
> Our LNT instance has detected that runtime of benchmark 465.tonto from the
> SPEC 2006 suite regressed on all of our machines (aarch64 ampere altra,
> intel skylake, amd zen{2,3,4}) on most configurations by 2-10%.
> 
> One example: Zen4 -Ofast -flto -march=native (regressed by 10%)
> https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=992.230.0
> 
> I've bisected the example configuration to r14-9193-ga0b1798042d033 (Richard
> Biener: tree-optimization/114074 - CHREC multiplication and undefined
> overflow).
> 
> There have been two other SPEC benchmarks regressions reported that also got
> bisected to this commit -- pr114269, pr114238. I assume that all of these
> have the same cause.

Please don't open more tickets unless you are assuming they do *not* have the
same cause.

*** This bug has been marked as a duplicate of bug 114269 ***