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Subject: [Bug target/104894] [11/12 Regression] ICE with -fno-plt
 -mcpu=power10 on PowerPC64 LE Linux
Date: Tue, 12 Apr 2022 20:24:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104894

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Peter Bergner
<bergner@gcc.gnu.org>:

https://gcc.gnu.org/g:5ede37c0f274f0de19afd662588891e32b60f705

commit r11-9836-g5ede37c0f274f0de19afd662588891e32b60f705
Author: Peter Bergner <bergner@linux.ibm.com>
Date:   Tue Apr 12 14:08:53 2022 -0500

    rs6000: Handle pcrel sibcalls to longcall functions [PR104894]

    Before PCREL in POWER10, we were not allowed to perform sibcalls to
longcall
    functions since callee's return would skip the TOC restore in the calle=
r.
    However, with PCREL we can now safely perform a sibling call to longcall
    functions.  The problem with the current code is that pcrel sibcall
    branches to a PLT stub label even though -fno-plt was used.  The soluti=
on
    here is to check for a pcrel longcall and emit an inline plt stub in
    that case.

    2022-04-11  Peter Bergner  <bergner@linux.ibm.com>

    gcc/
            PR target/104894
            * config/rs6000/rs6000.c (rs6000_sibcall_aix): Handle pcrel
sibcalls
            to longcall functions.

    gcc/testsuite/
            PR target/104894
            * gcc.target/powerpc/pr104894.c: New test.
            * gcc.target/powerpc/pr104894-2.c: New test.

    (cherry picked from commit d74c4c6a1b4956b5cd9b2a770bb7261836fa1289)=