[llvm] [WIP][X86] combineX86ShufflesRecursively - attempt to combine shuffles with larger types from EXTRACT_SUBVECTOR nodes (PR #133947)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp llvm/lib/Target/X86/X86ISelLowering.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 6b7d82bdc..b5a1f0b2d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -40836,8 +40836,8 @@ static SDValue combineX86ShufflesRecursively(
              Op.getOperand(1).getOperand(0).getValueSizeInBits() >
                  RootSizeInBits) {
     // If we're inserting an subvector extracted from a vector larger than
-    // RootVT, then combine the insert_subvector as a shuffle, the extract_subvector
-    // will be folded in a later recursion.
+    // RootVT, then combine the insert_subvector as a shuffle, the
+    // extract_subvector will be folded in a later recursion.
     SDValue BaseVec = Op.getOperand(0);
     SDValue SubVec = Op.getOperand(1);
     int InsertIdx = Op.getConstantOperandVal(2);

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https://github.com/llvm/llvm-project/pull/133947