[Bug target/93300] ICE in convert_mode_scalar, at expr.c:325

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93300

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Stam Markianos-Wright
<stammark@gcc.gnu.org>:

https://gcc.gnu.org/g:ff861d65950ede95b6c28ac720c56d44cff784de

commit r10-6473-gff861d65950ede95b6c28ac720c56d44cff784de
Author: Stam Markianos-Wright <stam.markianos-wright@arm.com>
Date:   Wed Feb 5 19:21:42 2020 +0000

        [GCC][BUG][ARM] Fix ICE due to BFmode libfunc call (PR93300)

        This was sent and approved on gcc-patches as "[GCC][BUG][Aarch64][ARM]
        (PR93300) Fix ICE due to BFmode placement in GET_MODES_WIDER chain".

        The observed error came about because BFmode was placed between HFmode
        and SFmode in the GET_MODES_WIDER chain, resulting in
convert_mode_scalar
        attempting to gen a libfunc for a HFmode -> BFmode conversion.

        This patch registers NULL for all libfuncs in BFmode, which stops the
        middle-end from attempting to generate them.

        gcc/ChangeLog:
        2020-02-06  Stam Markianos-Wright  <stam.markianos-wright@arm.com>

        PR target/93300
        * config/arm/arm.c (arm_block_arith_comp_libfuncs_for_mode): New.
        (arm_init_libfuncs): Add BFmode support to block spurious BF libfuncs.
        Use arm_block_arith_comp_libfuncs_for_mode for HFmode.