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

[ro at gcc dot gnu.org via Gcc-bugs]

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

--- Comment #28 from Rainer Orth <ro at gcc dot gnu.org> ---
Btw., I noticed that the test is already skipped in plugins.exp on arm/thumb1:

    # Skip tail call tests on targets that do not have sibcall_epilogue.
    if {[regexp ".*must_tail_call_plugin.c" $plugin_src]
        && [istarget arm*-*-*]
        && [check_effective_target_arm_thumb1]} then { 
        continue
    }