[Bug target/100021] [9/10/11 Regression] std::clamp unprofitable vectorization on -march=nehalem/.../broadwell

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100021

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
             Target|                            |x86_64-*-* i?86-*-*
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-04-12

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm quite sure the LLVM MCA calculation is "wrong".  The transform speeds up a
SPEC benchmark by >10% on a Haswell CPU.

So please show an actual runtime testcase that regresses.