[Bug target/116425] RISC-V missed optimization: vector lowering along lmul boundaries

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116425

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Target|                            |riscv

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think both passes are valid placed to improve this.  The vector constructor
could be from the original source as well.

Note vector lowering already tries to compute a "compute mode", but not in
all lowering paths IIRC and possibly not aware of VLA vectors or "LMUL".