[llvm] [RISCV] Use ri.vzip2{a, b} for interleave2 if available (PR #136364)

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp,h -- llvm/lib/Target/RISCV/RISCVISelLowering.cpp llvm/lib/Target/RISCV/RISCVISelLowering.h
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 6abcba4fa..8f96a8e37 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -11755,8 +11755,8 @@ SDValue RISCVTargetLowering::lowerVECTOR_INTERLEAVE(SDValue Op,
 
   // Use ri.vzip2{a,b} if available
   // TODO: Figure out the best lowering for the spread variants
-  if (Subtarget.hasVendorXRivosVizip() &&
-      !Op.getOperand(0).isUndef() && !Op.getOperand(1).isUndef()) {
+  if (Subtarget.hasVendorXRivosVizip() && !Op.getOperand(0).isUndef() &&
+      !Op.getOperand(1).isUndef()) {
     SDValue V1 = Op->getOperand(0);
     SDValue V2 = Op->getOperand(1);
     SDValue Lo = lowerVZIP(RISCVISD::RI_VZIP2A_VL, V1, V2, DL, DAG, Subtarget);

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https://github.com/llvm/llvm-project/pull/136364