[llvm] [RISCV] Allow undef elements in isDeinterleaveShuffle (PR #114585)

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git-clang-format --diff faa385a9f4d164791e2400f3f53e9c021114f52b 946ac97e610b659638b57092b592bc15095021f4 --extensions cpp -- llvm/lib/Target/RISCV/RISCVISelLowering.cpp
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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 047f74f3e6..aab6d38406 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -4477,8 +4477,7 @@ static bool isDeinterleaveShuffle(MVT VT, MVT ContainerVT, SDValue V1,
 
   // The others must increase by 2 each time (or be undef).
   for (unsigned i = 1; i != Mask.size(); ++i)
-    if (Mask[i] != Mask[i - 1] + 2 &&
-        Mask[i] != -1)
+    if (Mask[i] != Mask[i - 1] + 2 && Mask[i] != -1)
       return false;
 
   return true;

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https://github.com/llvm/llvm-project/pull/114585