[clang] [llvm] [HIP] Support managed variables using the new driver (PR #123437)

[Matt Arsenault via cfe-commits]

================
@@ -1221,12 +1221,31 @@ void CGNVCUDARuntime::createOffloadingEntries() {
              ? static_cast<int32_t>(llvm::offloading::OffloadGlobalNormalized)
              : 0);
     if (I.Flags.getKind() == DeviceVarFlags::Variable) {
-      llvm::offloading::emitOffloadingEntry(
-          M, I.Var, getDeviceSideName(I.D), VarSize,
-          (I.Flags.isManaged() ? llvm::offloading::OffloadGlobalManagedEntry
-                               : llvm::offloading::OffloadGlobalEntry) |
-              Flags,
-          /*Data=*/0, Section);
+      if (I.Flags.isManaged()) {
+        assert(I.Var->getName().ends_with(".managed") &&
+               "HIP managed variables not transformed");
+
----------------
arsenm wrote:

Add a todo about the format change to use one struct 

https://github.com/llvm/llvm-project/pull/123437
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