[llvm] [NVPTX] Add some basic folds for ADDRSPACECAST (PR #129157)

[Alex MacLean via llvm-commits]

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@@ -5209,6 +5209,26 @@ PerformBUILD_VECTORCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
   return DAG.getNode(ISD::BITCAST, DL, VT, PRMT);
 }
 
+static SDValue combineADDRSPACECAST(SDNode *N,
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AlexMaclean wrote:

Fair enough, I've removed the transitive case for now.

https://github.com/llvm/llvm-project/pull/129157