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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/113463] ICE: in extended_tree, at tree.h:6449
 with _BitInt() used as offset
Date: Fri, 19 Jan 2024 09:02:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113463

--- Comment #2 from GCC 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:df1cd90e32bb17d34f5fdce99bd0377fe1b8e5c6

commit r14-8277-gdf1cd90e32bb17d34f5fdce99bd0377fe1b8e5c6
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jan 19 10:00:51 2024 +0100

    gimple-ssa-warn-restrict: Only use type range from NOP_EXPR for
non-narrowing conversions [PR113463]

    builtin_memref::extend_offset_range when it sees a NOP_EXPR from
    INTEGRAL_TYPE (to INTEGRAL_TYPE of sizetype/ptrdifftype precision
    given the callers) uses wi::to_offset on TYPE_{MIN,MAX}_VALUE
    of the rhs1 type.  This ICEs with large BITINT_TYPEs - to_offset
    is only supported for precisions up to the offset_int precision
    - but it even doesn't make any sense to do such thing for narrowing
    conversions, their range means the whole sizetype/ptrdifftype range
    and so the normal handling done later on (largest sized supported objec=
t)
    is the way to go in that case.

    So, the following patch just restrict this to non-narrowing conversions.

    2024-01-19  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/113463
            * gimple-ssa-warn-restrict.cc
(builtin_memref::extend_offset_range):
            Only look through NOP_EXPRs if rhs1 doesn't have wider type than
            lhs.

            * gcc.dg/bitint-74.c: New test.=