[llvm] [LV] Convert gather loads with invariant stride into strided loads (PR #147297)

[Mel Chen via llvm-commits]

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@@ -1797,6 +1806,125 @@ void VPWidenIntrinsicRecipe::printRecipe(raw_ostream &O, const Twine &Indent,
 }
 #endif
 
+unsigned VPWidenMemIntrinsicRecipe::getMemoryPointerParamPos() const {
+  if (auto Pos = VPIntrinsic::getMemoryPointerParamPos(VectorIntrinsicID))
+    return *Pos;
+
+  switch (VectorIntrinsicID) {
+  case Intrinsic::masked_load:
+  case Intrinsic::masked_gather:
+  case Intrinsic::masked_expandload:
+    return 0;
+  case Intrinsic::masked_store:
+  case Intrinsic::masked_scatter:
+  case Intrinsic::masked_compressstore:
+    return 1;
+  default:
+    llvm_unreachable("unknown vector memory intrinsic");
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Mel-Chen wrote:

5b5ef06b22d0dc9543a085bf821333ea2bfc7a34
I narrowed the feature of VPWidenMemIntrinsicRecipe. Now only for Intrinsic::experimental_vp_strided_load. 

https://github.com/llvm/llvm-project/pull/147297