[Bug target/109780] [12/13/14/15 Regression] csmith: runtime crash with -O2 -march=znver1

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780

--- Comment #40 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by H.J. Lu <hjl@gcc.gnu.org>:

https://gcc.gnu.org/g:11902be7a57c0ccf03786aa0255fffaf0f54dbf9

commit r15-7573-g11902be7a57c0ccf03786aa0255fffaf0f54dbf9
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Mar 14 11:41:51 2023 -0700

    x86: Properly find the maximum stack slot alignment

    Don't assume that stack slots can only be accessed by stack or frame
    registers.  We first find all registers defined by stack or frame
    registers.  Then check memory accesses by such registers, including
    stack and frame registers.

    gcc/

            PR target/109780
            PR target/109093
            * config/i386/i386.cc (ix86_update_stack_alignment): New.
            (ix86_find_all_reg_use_1): Likewise.
            (ix86_find_all_reg_use): Likewise.
            (ix86_find_max_used_stack_alignment): Also check memory accesses
            from registers defined by stack or frame registers.

    gcc/testsuite/

            PR target/109780
            PR target/109093
            * g++.target/i386/pr109780-1.C: New test.
            * gcc.target/i386/pr109093-1.c: Likewise.
            * gcc.target/i386/pr109780-1.c: Likewise.
            * gcc.target/i386/pr109780-2.c: Likewise.
            * gcc.target/i386/pr109780-3.c: Likewise.

    Signed-off-by: H.J. Lu <hjl.tools@gmail.com>