[Bug tree-optimization/100512] [12 Regression] ICE during GIMPLE pass: cddce in mark_operand_necessary, at tree-ssa-dce.c:173 (under -O2 to -Os) since r12-623-g1416a1434c43de0b

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100512

--- Comment #8 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:3f476de7fd274f619a0b04c2e2f7077ee8ab17a5

commit r12-852-g3f476de7fd274f619a0b04c2e2f7077ee8ab17a5
Author: Andrew MacLeod <amacl...@redhat.com>
Date:   Mon May 17 15:53:39 2021 -0400

    Once a range becomes constant, make it invariant.

    Once a range is forced to a constant globally, simply make it invariant.
    Unify this with the code which makes non-zero pointer ranges invariant.

            gcc/
            PR tree-optimization/100512
            * gimple-range-cache.cc (ranger_cache::set_global_range): Mark
const
            and non-zero pointer ranges as invariant.
            * gimple-range.cc (gimple_ranger::range_of_stmt): Remove pointer
            processing from here.

            gcc/testsuite/
            PR tree-optimization/100512
            * gcc.dg/pr100512.c: New.