[Bug tree-optimization/115426] ICE: in execute_todo, at passes.cc:2138

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115426

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Richard Biener
<rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:5b264a4b95b8f27c3c73892892d5c2030d3c8ea7

commit r14-10685-g5b264a4b95b8f27c3c73892892d5c2030d3c8ea7
Author: Richard Biener <rguent...@suse.de>
Date:   Tue Jun 11 13:11:08 2024 +0200

    middle-end/115426 - wrong gimplification of "rm" asm output operand

    When the operand is gimplified to an extract of a register or a
    register we have to disallow memory as we otherwise fail to
    gimplify it properly.  Instead of

      __asm__("" : "=rm" __imag <r>);

    we want

      __asm__("" : "=rm" D.2772);
      _1 = REALPART_EXPR <r>;
      r = COMPLEX_EXPR <_1, D.2772>;

    otherwise SSA rewrite will fail and generate wrong code with 'r'
    left bare in the asm output.

            PR middle-end/115426
            * gimplify.cc (gimplify_asm_expr): Handle "rm" output
            constraint gimplified to a register (operation).

            * gcc.dg/pr115426.c: New testcase.

    (cherry picked from commit a4bbdec2be1c9f8fb49276b8a54ee86024ceac17)