[llvm] [RISCV][VLOPT] Add support for checkUsers when UserMI is a Single-Width Integer Reduction (PR #120345)

[Michael Maitland via llvm-commits]

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@@ -930,6 +950,8 @@ bool RISCVVLOptimizer::isCandidate(const MachineInstr &MI) const {
   return true;
 }
 
+static MachineOperand One = MachineOperand::CreateImm(1);
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michaelmaitland wrote:

updated.

https://github.com/llvm/llvm-project/pull/120345