https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115247
--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Matthias Kretz <mkr...@gcc.gnu.org>: https://gcc.gnu.org/g:f79b273d4145961133ef8b0344469e77425629f6 commit r12-10571-gf79b273d4145961133ef8b0344469e77425629f6 Author: Matthias Kretz <m.kr...@gsi.de> Date: Wed May 15 11:02:22 2024 +0200 libstdc++: Avoid MMX return types from __builtin_shufflevector This resolves a regression on i686 that was introduced with r15-429-gfb1649f8b4ad50. Signed-off-by: Matthias Kretz <m.kr...@gsi.de> libstdc++-v3/ChangeLog: PR libstdc++/115247 * include/experimental/bits/simd.h (__as_vector): Don't use vector_size(8) on __i386__. (__vec_shuffle): Never return MMX vectors, widen to 16 bytes instead. (concat): Fix padding calculation to pick up widening logic from __as_vector. (cherry picked from commit 241a6cc88d866fb36bd35ddb3edb659453d6322e)
