[llvm] [NVPTX] Add TTI support for folding isspacep in InferAS (PR #114486)

[Artem Belevich via llvm-commits]

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@@ -458,7 +459,7 @@ handleSpaceCheckIntrinsics(InstCombiner &IC, IntrinsicInst &II) {
       if (auto *ASCO = dyn_cast<AddrSpaceCastOperator>(Op0))
         AS = ASCO->getOperand(0)->getType()->getPointerAddressSpace();
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Artem-B wrote:

Where do we run AS inference pass in the pipeline? If it's early, then I think it would make sense to keep isspacep folding in one place only, and AS inference pass looks like a better place for that.

https://github.com/llvm/llvm-project/pull/114486