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From: "jim.gray at atos dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109750] New: Incorrect code generated for shifted bit field
Date: Fri, 05 May 2023 17:27:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109750

            Bug ID: 109750
           Summary: Incorrect code generated for shifted bit field
           Product: gcc
           Version: 9.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jim.gray at atos dot net
  Target Milestone: ---

Created attachment 55008
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D55008&action=3Dedit
Tar file with source, assembly listing, compile script, executable

Attached is a simple program that shows the problem encountered.

Bad output when compiling with GCC compiler on Ubuntu
~/gcc-bug$ ./gccbug
  Source =3D 000000020000
  Target =3D 000000000200
  Target =3D 1777777777760000000200

Good output when compiling with MS C++ compiler on Windows:
>gccbug
  Source =3D 000000020000
  Target =3D 000000000200
  Target =3D 020000000200=