[Bug target/120714] [15 regression] RISC-V: incorrect frame pointer CFA address for stack-clash protection loops

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120714

--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Jeff Law <l...@gcc.gnu.org>:

https://gcc.gnu.org/g:93eeb52a81b2a6c11917b14549ff5a5aeb37af8f

commit r15-10075-g93eeb52a81b2a6c11917b14549ff5a5aeb37af8f
Author: Alexey Merzlyakov <alexey.merzlya...@samsung.com>
Date:   Mon Jun 30 13:58:29 2025 -0600

    [RISC-V] Correct CFA notes for stack-clash protection [PR120714]

    Fixes incorrect SP-addresses used in CFA notes for the stack probes
    unrelative to the frame's top. It applied to the RISC-V targets code
    generation when the stack-clash protection is enabled.

            PR target/120714
    gcc/ChangeLog:

            * config/riscv/riscv.cc (riscv_allocate_and_probe_stack_space):
            Fix SP-addresses in REG_CFA_DEF_CFA notes for stack-clash case.

    gcc/testsuite/ChangeLog:

            * gcc.target/riscv/pr120714.c: New test.

    (cherry picked from commit 45a17e3081120f51f8e8b1d7cda73c7d89453e85)