[llvm] [NVPTX][NFCI] Use DataLayout to determine short shared/local/const pointers (PR #89404)

[Artem Belevich via llvm-commits]

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@@ -768,22 +764,25 @@ void NVPTXDAGToDAGISel::SelectAddrSpaceCast(SDNode *N) {
     switch (SrcAddrSpace) {
     default: report_fatal_error("Bad address space in addrspacecast");
     case ADDRESS_SPACE_GLOBAL:
-      Opc = TM.is64Bit() ? NVPTX::cvta_global_yes_64 : NVPTX::cvta_global_yes;
+      Opc = TM.is64Bit() ? NVPTX::cvta_global_64 : NVPTX::cvta_global;
       break;
     case ADDRESS_SPACE_SHARED:
-      Opc = TM.is64Bit() ? (useShortPointers() ? NVPTX::cvta_shared_yes_6432
-                                               : NVPTX::cvta_shared_yes_64)
-                         : NVPTX::cvta_shared_yes;
+      Opc = TM.is64Bit() ? (TM.getPointerSizeInBits(SrcAddrSpace) == 32
+                                ? NVPTX::cvta_shared_6432
+                                : NVPTX::cvta_shared_64)
+                         : NVPTX::cvta_shared;
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Artem-B wrote:

This looks like a common pattern. We could extract it into a helper function

https://github.com/llvm/llvm-project/pull/89404