[llvm] [DAGCombiner] Don't let scalarizeBinOpOfSplats create illegal scalar MULHS/MULHU (PR #104518)

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``````````bash
git-clang-format --diff c458e9e034b2c49a4b35eb732f08a30b338a9ae2 d0072617b79f76189e5a9192aed1d2cf9fd21390 --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index cab7be9dd4..b21bea649e 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -27141,8 +27141,7 @@ static SDValue scalarizeBinOpOfSplats(SDNode *N, SelectionDAG &DAG,
     return SDValue();
 
   // FIXME: Type legalization can't handle illegal MULHS/MULHU.
-  if ((Opcode == ISD::MULHS || Opcode == ISD::MULHU) &&
-      !TLI.isTypeLegal(EltVT))
+  if ((Opcode == ISD::MULHS || Opcode == ISD::MULHU) && !TLI.isTypeLegal(EltVT))
     return SDValue();
 
   SDValue IndexC = DAG.getVectorIdxConstant(Index0, DL);

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https://github.com/llvm/llvm-project/pull/104518