[llvm] [ValueTracking] Handle FADD and XOR in matchSimpleRecurrence. (PR #144031)

[Nikita Popov via llvm-commits]

nikic wrote:

@rj-jesus I'd check for integer specifically instead of isSCEVable. I'd also move the getSCEV call into isBigEndianBitShift to cover both call-sites. (Generally the use of SCEV for that check seems a bit questionable, but that's unrelated to this patch).

https://github.com/llvm/llvm-project/pull/144031