[Bug tree-optimization/89804] optimization opportunity: move variable from stack to register

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89804

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The decision is currently to limit GIMPLE-level memcpy "inlining" to
power-of-two
(mode-precision) (single) moves and leave the rest to RTL expansion.