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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] Incorrect code generated for shifted bit field
Date: Fri, 05 May 2023 18:13:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109750

--- Comment #5 from jim.gray at atos dot net ---
I don't know if it makes any difference, but I ran with an older version of=
 the
Intel C++ compiler on Linux, with the results below:

Good output when compiling with the Intel C++ compiler=20
on CentOS Linux release 7.7.1908=20

[builder@7f936516e827 ~]$ icc --version
icc (ICC) 17.0.2 20170213
Copyright (C) 1985-2017 Intel Corporation.  All rights reserved.

[builder@af80ebc5f176 gccbug]$ icc gccbug.cpp
[builder@af80ebc5f176 gccbug]$=20

[builder@af80ebc5f176 gccbug]$ ls -l
total 28
-rwxrwxr-x 1 builder builder 22592 May  5 18:02 a.out
-rw-rw-r-- 1 builder builder  3553 May  5 18:02 gccbug.cpp
[builder@af80ebc5f176 gccbug]$=20

[builder@af80ebc5f176 gccbug]$ ./a.out
Example showing GCC bug:
  Source =3D 000000020000
  Target =3D 000000000200
  Target =3D 020000000200
Example showing workaround for bug:
  Source =3D 000000020000
  Target =3D 000000000200
  Temp   =3D 000000020000
  Temp   =3D 020000000000
  Target =3D 020000000200
[builder@af80ebc5f176 gccbug]$=