[llvm] [RISCV][TTI] Refine reverse shuffle costing for high LMUL (PR #144155)

[via llvm-commits]

github-actions[bot] wrote:

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You can test this locally with the following command:
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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index fcc9d3977..288a20f0c 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -904,8 +904,11 @@ InstructionCost RISCVTTIImpl::getShuffleCost(TTI::ShuffleKind Kind,
         ContainerVT.getVectorMinNumElements() / M1VT.getVectorMinNumElements();
     InstructionCost GatherCost =
         getRISCVInstructionCost({RISCV::VRGATHER_VV}, M1VT, CostKind) * Ratio;
-    InstructionCost SlideCost = !LT.second.isFixedLengthVector() ? 0 :
-      getRISCVInstructionCost({RISCV::VSLIDEDOWN_VX}, LT.second, CostKind);
+    InstructionCost SlideCost =
+        !LT.second.isFixedLengthVector()
+            ? 0
+            : getRISCVInstructionCost({RISCV::VSLIDEDOWN_VX}, LT.second,
+                                      CostKind);
     return FixedCost + LT.first * (GatherCost + SlideCost);
   }
   }

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https://github.com/llvm/llvm-project/pull/144155