[Bug tree-optimization/66675] Could improve vector lane folding style operations.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66675

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> Basically VECTOR_CST + VECTOR_CST is not optimized at all.  I bet almost all
> operations that act on VECTOR_CST are not optimized including and not
> limited to PLUS, SUB, MULTIPLY, DIVIDE, SHIFT, IOR, XOR, and AND.

Or rather CONSTRUCTOR + VECTOR_CST.  We I suspect having a VECTOR_EXPR instead
of a CONSTRUCTOR can help in those cases.