[Bug tree-optimization/106087] [12 Regression] ICE with inline-asm with multiple output and assigned only static vars

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106087

--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:e0e388998b797da09a8c018f6f94d1358fd4b8f1

commit r12-8627-ge0e388998b797da09a8c018f6f94d1358fd4b8f1
Author: Andrew Pinski <apinski@marvell.com>
Date:   Thu Jul 7 22:06:19 2022 +0000

    Fix tree-opt/PR106087: ICE with inline-asm with multiple output and
assigned only static vars

    The problem here is that when we mark the ssa name that was referenced in
the now removed
    dead store (to a write only static variable), the inline-asm would also be
removed
    even though it was defining another ssa name. This fixes the problem by
checking
    to make sure that the statement was only defining one ssa name.

    Committed as approved after a bootstrapped and tested on x86_64 with no
regressions.

            PR tree-optimization/106087

    gcc/ChangeLog:

            * tree-ssa-dce.cc (simple_dce_from_worklist): Check
            to make sure the statement is only defining one operand.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/compile/inline-asm-1.c: New test.

    (cherry picked from commit 71e3daa31cfa35ee58e5899cb00767be92227fd2)