[llvm] [CostModel][X86] Add initial costs for non-lane-crossing one/two input shuffles (PR #114680)

[Simon Pilgrim via llvm-commits]

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@@ -1564,6 +1564,7 @@ InstructionCost X86TTIImpl::getShuffleCost(
   bool IsInLaneShuffle = false;
   if (BaseTp->getPrimitiveSizeInBits() > 0 &&
       (BaseTp->getPrimitiveSizeInBits() % 128) == 0 &&
+      BaseTp->getScalarSizeInBits() == LT.second.getScalarSizeInBits() &&
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RKSimon wrote:

Not, thats what `BaseTp->getPrimitiveSizeInBits() > 0` is checking for as ptr vectors return 0

https://github.com/llvm/llvm-project/pull/114680