[llvm] [RISCV] Introduce local peephole to reduce VLs based on demanded VL (PR #104689)

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git-clang-format --diff f668708796b981733a5816f2efed0d5195af923d 4f8744fd24f9778140aa2567c0358cefbfe3971e --extensions cpp -- llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp b/llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp
index b2891376ea..4165974f15 100644
--- a/llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp
+++ b/llvm/lib/Target/RISCV/RISCVVectorPeephole.cpp
@@ -82,7 +82,6 @@ char RISCVVectorPeephole::ID = 0;
 INITIALIZE_PASS(RISCVVectorPeephole, DEBUG_TYPE, "RISC-V Fold Masks", false,
                 false)
 
-
 /// Given two VL operands, returns the one known to be the smallest or nullptr
 /// if unknown.
 static const MachineOperand *getKnownMinVL(const MachineOperand *LHS,
@@ -161,8 +160,7 @@ bool RISCVVectorPeephole::tryToReduceVL(MachineInstr &MI) const {
   if (ActiveElementsAffectResult || Src->mayRaiseFPException())
     return false;
 
-  MachineOperand &SrcVL =
-    Src->getOperand(RISCVII::getVLOpNum(Src->getDesc()));
+  MachineOperand &SrcVL = Src->getOperand(RISCVII::getVLOpNum(Src->getDesc()));
   const MachineOperand *MinVL = getKnownMinVL(&VL, &SrcVL);
   if (!MinVL || MinVL == &SrcVL)
     return false;

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https://github.com/llvm/llvm-project/pull/104689