[llvm] [IA] Relax the requirement of having ExtractValue users on deinterleave intrinsic (PR #148716)

[Philip Reames via llvm-commits]

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@@ -618,29 +618,14 @@ bool InterleavedAccessImpl::lowerDeinterleaveIntrinsic(
   const unsigned Factor = getDeinterleaveIntrinsicFactor(DI->getIntrinsicID());
   assert(Factor && "unexpected deinterleave intrinsic");
 
-  SmallVector<Value *, 8> DeinterleaveValues(Factor, nullptr);
-  Value *LastFactor = nullptr;
-  for (auto *User : DI->users()) {
-    auto *Extract = dyn_cast<ExtractValueInst>(User);
-    if (!Extract || Extract->getNumIndices() != 1)
-      return false;
-    unsigned Idx = Extract->getIndices()[0];
-    if (DeinterleaveValues[Idx])
-      return false;
-    DeinterleaveValues[Idx] = Extract;
-    LastFactor = Extract;
-  }
-
-  if (!LastFactor)
-    return false;
-
   Value *Mask = nullptr;
   if (auto *VPLoad = dyn_cast<VPIntrinsic>(LoadedVal)) {
     if (VPLoad->getIntrinsicID() != Intrinsic::vp_load)
       return false;
     // Check mask operand. Handle both all-true/false and interleaved mask.
     Value *WideMask = VPLoad->getOperand(1);
-    Mask = getMask(WideMask, Factor, cast<VectorType>(LastFactor->getType()));
+    Mask = getMask(WideMask, Factor,
+                   cast<VectorType>(getDeinterleavedVectorType(DI)));
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preames wrote:

e.g. a removable cast

https://github.com/llvm/llvm-project/pull/148716