https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122981
--- Comment #14 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-16 branch has been updated by Matthias Kretz <[email protected]>: https://gcc.gnu.org/g:7ebe0af619c317969346b7c612198776c2f89cc8 commit r16-9595-g7ebe0af619c317969346b7c612198776c2f89cc8 Author: Matthias Kretz <[email protected]> Date: Mon Aug 17 15:44:35 2026 +0200 libstdc++: Resolve integer type mismatches in stdx::simd [PR122981] Conversions from generic vector to ARM vector are rejected when the value type is not equal. Since arm-none-eabi defines int32_t as long rather than int, a generic int vector passed as int32x2_t argument is ill-formed. With this patch, use the intN_t aliases in general: for the central __int_for_sizeof meta function and when bitcasting vectors in the NEON popcount implementation. This solution avoids unnecessary reinterpretation of generic vectors as ARM vectors, keeping it a tiny bit more type safe. libstdc++-v3/ChangeLog: PR libstdc++/122981 * include/experimental/bits/simd.h (__int_for_sizeof): Return int32_t, int8_t, int16_t, and int64_t, rather than int, signed char, short, long, and long long. * include/experimental/bits/simd_neon.h (_S_popcount): Cast elements to int8_t, int16_t, int32_t, or int64_t, rather than signed char, short, int, or long. Signed-off-by: Matthias Kretz <[email protected]> (cherry picked from commit 4e08734e5fcfba5fb657a163a20c001236655f01)
