[Bug target/123390] UBSAN: arm: gcc/config/arm/arm.cc:5435:48: runtime error: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int'

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123390

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Earnshaw <rearn...@gcc.gnu.org>:

https://gcc.gnu.org/g:d1f4800d973367c9b34407b405ba3de55a885d54

commit r16-6541-gd1f4800d973367c9b34407b405ba3de55a885d54
Author: Richard Earnshaw <rearn...@arm.com>
Date:   Mon Jan 5 17:29:25 2026 +0000

    arm: avoid UB in arm_gen_constant [PR123390]

    To avoid having potentially UB in arm_gen_const, use the macros
    from hwint.h to correctly type literal values.

    gcc/ChangeLog:

            PR target/123390
            * config/arm/arm.cc (arm_gen_constant): Fix types of HWI literals.
            (arm_const_double_prefer_rsbs_rsc): Likewise.