[clang] [clang-tools-extra] [compiler-rt] [llvm] [flang] [TTI]Fallback to SingleSrcPermute shuffle kind, if no direct estimation for (PR #79837)

[David Green via cfe-commits]

davemgreen wrote:

I think this is probably OK for Arm & AArch64. In the long run we should ideally be adding better extract subvector costs, but this patch moves the cost in that direction.

https://github.com/llvm/llvm-project/pull/79837