[Bug tree-optimization/94908] Failure to optimally optimize certain shuffle patterns

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94908

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Even if we write __builtin_shuffle, the vector lowering pass turns it into the
same code (constructor of BIT_FIELD_REFs), which seems to indicate that the
target does not handle this pattern.