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

[Kamlesh Kumar via llvm-commits]

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@@ -5192,6 +5192,17 @@ unsigned AArch64TTIImpl::getMaxInterleaveFactor(ElementCount VF) const {
   return ST->getMaxInterleaveFactor();
 }
 
+bool AArch64TTIImpl::supportsVectorInterleaveDeinterleaveIntrinsics(
+    unsigned Factor, VectorType *VecTy) const {
+  if (VecTy->isScalableTy()) {
+    assert(Factor <= 8 && "Scalable vector interleave/deinterleave intrinsics "
+                          "only support factors up to 8");
+    return Factor <= 8;
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kamleshbhalui wrote:

updated

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