https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119103
--- Comment #12 from Niklas Haas <gcc at haasn dot dev> --- Out of curiosity, is there a work-around that I could use to get current versions of GCC to compile the right thing, but without breaking cross-platform compatibility? I did try replacing the assertion by "x[i] << (amount & 0xF)" but the vector version of the code at least still compiles down to vpslld.
