llvm-project

f2ac265c - [RISCV] Reduce the LMUL for a vrgather operation if legal (#125768)

[RISCV] Reduce the LMUL for a vrgather operation if legal (#125768) If we're lowering a shuffle to a vrgather (or vcompress), and we know that a prefix of the operation can be done while producing the same (defined) lanes, do the operation with a narrower LMUL.