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Subject: [Bug analyzer/101082] new test case gcc.dg/analyzer/bitfields-1.c
 from r12-1303 fails on BE
Date: Tue, 15 Jun 2021 21:54:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101082

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

https://gcc.gnu.org/g:ec3fafa9ec7d16b9d89076efd3bac1d1af0502b8

commit r12-1491-gec3fafa9ec7d16b9d89076efd3bac1d1af0502b8
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Tue Jun 15 17:53:34 2021 -0400

    analyzer: fix bitfield endianness issues [PR99212,PR101082]

    Looks like my patch for PR analyzer/99212 implicitly assumed
    little-endian, which the following patch fixes.

    Fixes bitfields-1.c on:
    - armeb-none-linux-gnueabihf
    - cris-elf
    - powerpc64-darwin
    - s390-linux-gnu

    gcc/analyzer/ChangeLog:
            PR analyzer/99212
            PR analyzer/101082
            * engine.cc: Include "target.h".
            (impl_run_checkers): Log BITS_BIG_ENDIAN, BYTES_BIG_ENDIAN, and
            WORDS_BIG_ENDIAN.
            * region-model-manager.cc
            (region_model_manager::maybe_fold_binop): Move support for mask=
ing
            via ARG0 & CST into...
            (region_model_manager::maybe_undo_optimize_bit_field_compare):
            ...this new function.  Flatten by converting from nested
            conditionals to a series of early return statements to reject
            failures.  Reject if type is not unsigned_char_type_node.
            Handle BYTES_BIG_ENDIAN when determining which bits are bound
            in the binding_map.
            * region-model.h
            (region_model_manager::maybe_undo_optimize_bit_field_compare):
            New decl.
            * store.cc (bit_range::dump): New function.
            * store.h (bit_range::dump): New decl.

    Signed-off-by: David Malcolm <dmalcolm@redhat.com>=