[Bug middle-end/121159] musttail gives bogus volatile function error message

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121159

--- Comment #31 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Rainer Orth <ro@gcc.gnu.org>:

https://gcc.gnu.org/g:fea034b49335eff45efaae01498f2b563f8d54ea

commit r16-8058-gfea034b49335eff45efaae01498f2b563f8d54ea
Author: Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
Date:   Thu Mar 12 20:53:50 2026 +0100

    testsuite: Fix gcc.dg/plugin/must-tail-call-2.c on SPARC [PR121159]

    The gcc.dg/plugin/must-tail-call-2.c test FAILs on 32 and 64-bit SPARC:

    FAIL: gcc.dg/plugin/must-tail-call-2.c -fplugin=./must_tail_call_plugin.so
(test for excess errors)

    Excess errors:
    gcc.dg/plugin/must-tail-call-2.c:58:3: error: cannot tail-call: target is
not able to optimize the call into a sibling call

    As discussed in the PR, this can be avoided by compiling with
    -fdelayed-branch on SPARC.

    Tested on sparc-sun-solaris2.11, sparc64-unknown-linux-gnu, and
    x86_64-pc-linux-gnu.

    2026-03-09  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

            gcc/testsuite:
            PR middle-end/121159
            * gcc.dg/plugin/must-tail-call-2.c (dg-additional-options): Add
            -fdelayed-branch on SPARC.