[Bug middle-end/106519] [13 Regression] internal compiler error: in gimple_phi_arg, at gimple.h:4594 by r13-1950

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106519

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tamar Christina <tnfchris@gcc.gnu.org>:

https://gcc.gnu.org/g:c832ec4c3ec4853ad89ff3b0dbf6e9454e75e8cc

commit r13-1963-gc832ec4c3ec4853ad89ff3b0dbf6e9454e75e8cc
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Thu Aug 4 16:35:31 2022 +0100

    middle-end: Fix phi-ssa assertion triggers.  [PR106519]

    For the diamond PHI form in tree_ssa_phiopt_worker we need to
    extract edge e2 sooner.  This changes it so we extract it at the
    same time we determine we have a diamond shape.

    gcc/ChangeLog:

            PR middle-end/106519
            * tree-ssa-phiopt.cc (tree_ssa_phiopt_worker): Check final phi edge
for
            diamond shapes.

    gcc/testsuite/ChangeLog:

            PR middle-end/106519
            * gcc.dg/pr106519.c: New test.