[Bug tree-optimization/106878] [11/12/13 Regression] ICE: verify_gimple failed at -O2 with pointers and bitwise caluclation

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106878

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:645ef01a463f15fc230e2155719c7a12cec89acf

commit r13-2658-g645ef01a463f15fc230e2155719c7a12cec89acf
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Sep 14 12:36:36 2022 +0200

    Disallow pointer operands for |, ^ and partly & [PR106878]

    My change to match.pd (that added the two simplifications this patch
    touches) results in more |/^/& assignments with pointer arguments,
    but since r12-1608 we reject pointer operands for BIT_NOT_EXPR.

    Disallowing them for BIT_NOT_EXPR and allowing for BIT_{IOR,XOR,AND}_EXPR
    leads to a match.pd maintainance nightmare (see one of the patches in the
    PR), so either we want to allow pointer operand on BIT_NOT_EXPR (but then
    we run into issues e.g. with the ranger which expects it can emulate
    BIT_NOT_EXPR ~X as - 1 - X which doesn't work for pointers which don't
    support MINUS_EXPR), or the following patch disallows pointer arguments
    for all of BIT_{IOR,XOR,AND}_EXPR with the exception of BIT_AND_EXPR
    with INTEGER_CST last operand (for simpler pointer realignment).
    I had to tweak one reassoc optimization and the two match.pd
    simplifications.

    2022-09-14  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/106878
            * tree-cfg.cc (verify_gimple_assign_binary): Disallow pointer,
            reference or OFFSET_TYPE BIT_IOR_EXPR, BIT_XOR_EXPR or, unless
            the second argument is INTEGER_CST, BIT_AND_EXPR.
            * match.pd ((type) X op CST -> (type) (X op ((type-x) CST)),
            (type) (((type2) X) op Y) -> (X op (type) Y)): Punt for
            POINTER_TYPE_P or OFFSET_TYPE.
            * tree-ssa-reassoc.cc (optimize_range_tests_cmp_bitwise): For
            pointers cast them to pointer sized integers first.

            * gcc.c-torture/compile/pr106878.c: New test.