[llvm] [RISCV][TTI] Add shuffle costing for masked slide lowering (PR #128537)

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git-clang-format --diff 529b3d16daf2c7970f6f0b1f97e8ed09891c726a 8b64212562ced109957aec8c4f6f2a974223d3db --extensions h,cpp -- llvm/include/llvm/Analysis/VectorUtils.h llvm/lib/Analysis/VectorUtils.cpp llvm/lib/Target/RISCV/RISCVISelLowering.cpp llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 551c814ef6..6b8a4170a8 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -5944,7 +5944,8 @@ bool RISCVTargetLowering::isShuffleMaskLegal(ArrayRef<int> M, EVT VT) const {
   std::pair<int, int> SrcInfo[2];
   int Dummy1, Dummy2;
   return ShuffleVectorInst::isReverseMask(M, NumElts) ||
-         (::isMaskedSlidePair(M, SrcInfo) && isElementRotate(SrcInfo, NumElts)) ||
+         (::isMaskedSlidePair(M, SrcInfo) &&
+          isElementRotate(SrcInfo, NumElts)) ||
          isInterleaveShuffle(M, SVT, Dummy1, Dummy2, Subtarget);
 }
 
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index 1b53db38b1..d08c3593bc 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -474,7 +474,8 @@ costShuffleViaVRegSplitting(RISCVTTIImpl &TTI, MVT LegalVT,
   return InstructionCost::getInvalid();
 }
 
-InstructionCost RISCVTTIImpl::getSlideCost(FixedVectorType *Tp, ArrayRef<int> Mask,
+InstructionCost RISCVTTIImpl::getSlideCost(FixedVectorType *Tp,
+                                           ArrayRef<int> Mask,
                                            TTI::TargetCostKind CostKind) {
   // Avoid missing masks
   if (Mask.size() <= 2)
@@ -495,7 +496,7 @@ InstructionCost RISCVTTIImpl::getSlideCost(FixedVectorType *Tp, ArrayRef<int> Ma
     assert(SlideAmt != 0);
     if (SlideAmt < 0)
       return SlideAmt > -32 ? RISCV::VSLIDEDOWN_VI : RISCV::VSLIDEDOWN_VX;
-    return  SlideAmt < 32 ? RISCV::VSLIDEUP_VI : RISCV::VSLIDEUP_VX;
+    return SlideAmt < 32 ? RISCV::VSLIDEUP_VI : RISCV::VSLIDEUP_VX;
   };
 
   std::pair<int, int> SrcInfo[2];
@@ -519,11 +520,13 @@ InstructionCost RISCVTTIImpl::getSlideCost(FixedVectorType *Tp, ArrayRef<int> Ma
     unsigned Opcode = getSlideOpcode(SrcInfo[1].second);
     SecondSlideCost = getRISCVInstructionCost(Opcode, LT.second, CostKind);
   } else {
-    SecondSlideCost = getRISCVInstructionCost(RISCV::VMERGE_VVM, LT.second, CostKind);
+    SecondSlideCost =
+        getRISCVInstructionCost(RISCV::VMERGE_VVM, LT.second, CostKind);
   }
 
   auto EC = Tp->getElementCount();
-  VectorType *MaskTy = VectorType::get(IntegerType::getInt1Ty(Tp->getContext()), EC);
+  VectorType *MaskTy =
+      VectorType::get(IntegerType::getInt1Ty(Tp->getContext()), EC);
   InstructionCost MaskCost = getConstantPoolLoadCost(MaskTy, CostKind);
   return FirstSlideCost + SecondSlideCost + MaskCost;
 }

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https://github.com/llvm/llvm-project/pull/128537