[llvm] [InstCombine] Transform `vector.reduce.add` and `splat` into multiplication (PR #161020)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
``````````

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``````````diff
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 9ae5f7dbe..9c4112b92 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -3789,7 +3789,8 @@ Instruction *InstCombinerImpl::visitCallInst(CallInst &CI) {
             cast<VectorType>(Arg->getType())->getElementCount();
         if (ReducedVectorElementCount.isFixed()) {
           unsigned VectorSize = ReducedVectorElementCount.getFixedValue();
-          return BinaryOperator::CreateMul(Splat, ConstantInt::get(Splat->getType(), VectorSize));
+          return BinaryOperator::CreateMul(
+              Splat, ConstantInt::get(Splat->getType(), VectorSize));
         }
       }
     }

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https://github.com/llvm/llvm-project/pull/161020