[clang] [OpenMP 60] Initial parsing/sema for `need_device_addr` modifier on `adjust_args` clause (PR #143442)

[Alexey Bataev via cfe-commits]

================
@@ -1515,11 +1516,21 @@ void 
Parser::ParseOMPDeclareVariantClauses(Parser::DeclGroupPtrTy Ptr,
         SmallVector<Expr *> Vars;
         IsError = ParseOpenMPVarList(OMPD_declare_variant, OMPC_adjust_args,
                                      Vars, Data);
-        if (!IsError)
-          llvm::append_range(Data.ExtraModifier == OMPC_ADJUST_ARGS_nothing
-                                 ? AdjustNothing
-                                 : AdjustNeedDevicePtr,
-                             Vars);
+        if (!IsError) {
+          switch (Data.ExtraModifier) {
+          case OMPC_ADJUST_ARGS_nothing:
+            llvm::append_range(AdjustNothing, Vars);
+            break;
+          case OMPC_ADJUST_ARGS_need_device_ptr:
+            llvm::append_range(AdjustNeedDevicePtr, Vars);
+            break;
+          case OMPC_ADJUST_ARGS_need_device_addr:
+            llvm::append_range(AdjustNeedDeviceAddr, Vars);
+            break;
+          default:
+            break;
----------------
alexey-bataev wrote:

Should it be llvm_unreachable?

https://github.com/llvm/llvm-project/pull/143442
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