[llvm] [RISCV] Add +optimized-nfN-segment-load-store (PR #114414)

[Luke Lau via llvm-commits]

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@@ -716,6 +716,28 @@ RISCVTTIImpl::getMaskedMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
   return getMemoryOpCost(Opcode, Src, Alignment, AddressSpace, CostKind);
 }
 
+static bool hasOptimizedSegmentLoadStore(unsigned NF,
+                                         const RISCVSubtarget *ST) {
+  switch (NF) {
+  case 2:
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lukel97 wrote:

I considered it but remembered coming across some PRs where people were actively trying to remove uses of macros in LLVM, e.g. https://github.com/llvm/llvm-project/pull/105551

I'm not strongly opinionated on this, is there a general stance we should take here?

https://github.com/llvm/llvm-project/pull/114414