[llvm] [IA][RISCV] Add support for vp.load/vp.store with shufflevector (PR #135445)

[Luke Lau via llvm-commits]

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@@ -339,25 +371,48 @@ bool InterleavedAccessImpl::lowerInterleavedLoad(
     return false;
 
   bool BinOpShuffleChanged =
-      replaceBinOpShuffles(BinOpShuffles.getArrayRef(), Shuffles, LI);
-
-  LLVM_DEBUG(dbgs() << "IA: Found an interleaved load: " << *LI << "\n");
+      replaceBinOpShuffles(BinOpShuffles.getArrayRef(), Shuffles, LoadOp);
+
+  // Check if the de-interleaved vp.load masks are the same.
+  unsigned ShuffleMaskLen = Shuffles[0]->getShuffleMask().size();
+  SmallVector<Constant *, 8> LaneMask(ShuffleMaskLen, nullptr);
+  if (auto *VPLoad = dyn_cast<VPIntrinsic>(LoadOp)) {
+    if (!isInterleavedConstantMask(
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lukel97 wrote:

It might be easier to just move the mask check into the VP branch below on line 387

https://github.com/llvm/llvm-project/pull/135445