[llvm] [RISCV] Disable fixed vectors in getOptimalMemOpType if minimum VLEN is 32. (PR #102974)

[Craig Topper via llvm-commits]

topperc wrote:

> At the moment, trying to use zve32x/zve32f is living very dangerously.

zve32x/zve32f are supposed to work as long as zvl64b or higher is also used.

https://github.com/llvm/llvm-project/pull/102974