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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/106677] Abstraction overhead with
 std::views::join
Date: Sat, 06 May 2023 21:03:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106677

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm, I don't know if this related to the original issue but in .optimized we
have now:
  # RANGE [irange] unsigned char [0, 1] NONZERO 0x1
  # SR.115_117 =3D PHI <_119(9), SR.115_121(7)>
  # RANGE [irange] unsigned char [0, 1] NONZERO 0x1
  _119 =3D MAX_EXPR <1, SR.115_117>;

But that Max is just 1 because the max range of SR.115_117 is 1.


I don't know how that showed up in phiopt4 though.
SR.115_117 !=3D 0 ? SR.115_117 : 1
The code definitely looks worse in GCC 13 compared to GCC 12.=