[Bug tree-optimization/119718] __attribute__((musttail)) affects whether -foptimize-tail-calls will in fact optimize a tail call

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119718

--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>:

https://gcc.gnu.org/g:7e91bba6d53899689b00bd0c995b35f6586fcacd

commit r15-9396-g7e91bba6d53899689b00bd0c995b35f6586fcacd
Author: Jakub Jelinek <ja...@redhat.com>
Date:   Sat Apr 12 13:12:56 2025 +0200

    tailc, expand: Small incremental tweak to tail call dump [PR119718]

    Here is an optional incremental tweak to the previous patch.
    Instead of

    ./xgcc -B ./ -S -O2 -fdump-{tree-tailc,rtl-expand}-details pr119718.c ;
grep -B1 '^\(;; \)\?Cannot tail-call:' pr119718.c.*
    pr119718.c.222t.tailc-_7 = bar (0);
    pr119718.c.222t.tailc:Cannot tail-call: call invocation refers to locals
    --
    pr119718.c.270r.expand-;; foo (1, 2, 3, 4, 5, 6, 7) [tail call]
    pr119718.c.270r.expand:;; Cannot tail-call: callee required more stack
slots than the caller

    this dumps

    ./xgcc -B ./ -S -O2 -fdump-{tree-tailc,rtl-expand}-details pr119718.c ;
grep '^\(;; \)\?Cannot tail-call:' pr119718.c.*
    pr119718.c.222t.tailc:Cannot tail-call: call invocation refers to locals:
_7 = bar (0);
    pr119718.c.270r.expand:;; Cannot tail-call: callee required more stack
slots than the caller: foo (1, 2, 3, 4, 5, 6, 7) [tail call]

    2025-04-12  Jakub Jelinek  <ja...@redhat.com>

            PR tree-optimization/119718
            * tree-tailcall.cc (maybe_error_musttail): Dump the GIMPLE at the
            end of the Cannot tail-call line rather than on the line before it.
            * calls.cc (maybe_complain_about_tail_call): Dump the GENERIC
            at the end of the ;; Cannot tail-call line rather than on the
            line before it.