[llvm] [SROA] Only try additional vector type candidates when needed (PR #77678)

[Craig Topper via llvm-commits]

topperc wrote:

> > Thanks @topperc -- do you have a test case I can look at?
> 
> here's a test https://godbolt.org/z/G5sxbf1sx

@jrbyrnes any update?

https://github.com/llvm/llvm-project/pull/77678