[RISCV] Update RISCVVectorPeephole pass name

It was previously called RISCVFoldMasks

Author: lukel97

llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp

@@ -56,7 +56,9 @@ class RISCVVectorPeephole : public MachineFunctionPass {
         MachineFunctionProperties::Property::IsSSA);
   }
 
-  StringRef getPassName() const override { return "RISC-V Fold Masks"; }
+  StringRef getPassName() const override {
+    return "RISC-V Vector Peephole Optimization";
+  }
 
 private:
   bool convertToVLMAX(MachineInstr &MI) const;

llvm/test/CodeGen/RISCV/O3-pipeline.ll

@@ -90,7 +90,7 @@
 ; CHECK-NEXT:       Lazy Block Frequency Analysis
 ; CHECK-NEXT:       RISC-V DAG->DAG Pattern Instruction Selection
 ; CHECK-NEXT:       Finalize ISel and expand pseudo-instructions
-; CHECK-NEXT:       RISC-V Fold Masks
+; CHECK-NEXT:       RISC-V Vector Peephole Optimization
 ; CHECK-NEXT:       Lazy Machine Block Frequency Analysis
 ; CHECK-NEXT:       Early Tail Duplication
 ; CHECK-NEXT:       Optimize machine instruction PHIs