[llvm] Use (de)interleaving intrinsics for fixed-length vectors (PR #202583)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/CodeGen/TargetLowering.h llvm/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp llvm/lib/IR/Intrinsics.cpp llvm/lib/Target/AArch64/AArch64ISelLowering.h llvm/lib/Target/RISCV/RISCVISelLowering.h llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/IR/Intrinsics.cpp b/llvm/lib/IR/Intrinsics.cpp
index 334838f2c..4e38dc7e0 100644
--- a/llvm/lib/IR/Intrinsics.cpp
+++ b/llvm/lib/IR/Intrinsics.cpp
@@ -1465,7 +1465,8 @@ static InterleaveIntrinsic InterleaveIntrinsics[] = {
 
 Intrinsic::ID Intrinsic::getInterleaveIntrinsicID(unsigned Factor) {
   if (Factor < 2 || Factor > 8)
-    report_fatal_error("Unexpected factor for llvm.vector.interleave intrinsic");
+    report_fatal_error(
+        "Unexpected factor for llvm.vector.interleave intrinsic");
   return InterleaveIntrinsics[Factor - 2].Interleave;
 }
 

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https://github.com/llvm/llvm-project/pull/202583