[Bug tree-optimization/101335] [12 Regression] wrong code at -O2 and above (casts between signed and unsigned) by r12-1796

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101335

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <amacl...@gcc.gnu.org>:

https://gcc.gnu.org/g:a1539b797a06e03b08e1f1de28ad0d19a3956616

commit r12-2258-ga1539b797a06e03b08e1f1de28ad0d19a3956616
Author: Andrew MacLeod <amacl...@redhat.com>
Date:   Mon Jul 12 11:38:17 2021 -0400

    Do not register a cast as an equivalence.

    Registering an equivalence between objects of the same size in a cast can
    cause other relations to be incorrect.

            gcc/
            PR tree-optimization/101335
            * range-op.cc (operator_cast::lhs_op1_relation): Delete.

            gcc/testsuite/
            * gcc.dg/tree-ssa/pr101335.c: New.