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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/107208] [aarch64] llvm generate better code
 than gcc base on _Complex type mul
Date: Tue, 11 Oct 2022 03:14:39 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107208

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
           Keywords|                            |missed-optimization
          Component|c++                         |rtl-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely this is a register allocation issue. I suspect it is due to the=
 way
incoming and returns are represented for complex integer types.

Note complex integer types are an extension to the c language so I doubt ma=
ny
people use them anyways.=