[llvm] [RISCV] Move performCombineVMergeAndVOps into RISCVFoldMasks (PR #71764)

[Luke Lau via llvm-commits]

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@@ -133,6 +438,48 @@ bool RISCVFoldMasks::convertVMergeToVMv(MachineInstr &MI, MachineInstr *V0Def) {
   return true;
 }
 
+bool RISCVFoldMasks::convertToUnmasked(MachineInstr &MI,
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lukel97 wrote:

Unfortunately convertToUnmasked is the one with the very large test diff. I think it also runs before `doPeepholeMergeVVMFold` so it would affect the output of that too

https://github.com/llvm/llvm-project/pull/71764