[Bug target/116274] [14/15 Regression] x86: poor code generation with 16 byte function arguments and addition

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116274

--- Comment #8 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---

> 
> codegen is probably an RA/LRA artifact caused by bad instruction constraints
> and the refuse to reload to a gpr.  Not sure if a move high to gpr is a
> thing,
> pextrq would work for sure.  But an unpck looks like a better match anyway.

RA issue is fixed.