[llvm] [DirectX] add maybe_unused to IsVolatile in legalizeMemCpy. (PR #143040)

[via llvm-commits]

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

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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/DirectX/DXILLegalizePass.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/DirectX/DXILLegalizePass.cpp b/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
index 85a463111..76a46c7a2 100644
--- a/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
+++ b/llvm/lib/Target/DirectX/DXILLegalizePass.cpp
@@ -470,7 +470,8 @@ static void legalizeMemCpy(Instruction &I,
   Value *Src = CI->getArgOperand(1);
   ConstantInt *Length = dyn_cast<ConstantInt>(CI->getArgOperand(2));
   assert(Length && "Expected Length to be a ConstantInt");
-  [[maybe_unused]] ConstantInt *IsVolatile = dyn_cast<ConstantInt>(CI->getArgOperand(3));
+  [[maybe_unused]] ConstantInt *IsVolatile =
+      dyn_cast<ConstantInt>(CI->getArgOperand(3));
   assert(IsVolatile && "Expected IsVolatile to be a ConstantInt");
   assert(IsVolatile->getZExtValue() == 0 && "Expected IsVolatile to be false");
   emitMemcpyExpansion(Builder, Dst, Src, Length);

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https://github.com/llvm/llvm-project/pull/143040