[OpenACC][CIR] copyout clause lowering on func-local declare (#169350)

This is identical to 'copy' and 'copyin', except it uses 'create' and
'copyout' as its entry/exit op. This patch adds the same tests, and
similar code for all of it.

Author: erichkeane

clang/lib/CIR/CodeGen/CIRGenDeclOpenACC.cpp

@@ -65,6 +65,16 @@ struct OpenACCDeclareCleanup final : EHScopeStack::Cleanup {
           createOutOp<mlir::acc::DeleteOp>(cgf, copyin);
           break;
         }
+      } else if (auto create = val.getDefiningOp<mlir::acc::CreateOp>()) {
+        switch (create.getDataClause()) {
+        default:
+          cgf.cgm.errorNYI(declareRange,
+                           "OpenACC local declare clause create cleanup");
+          break;
+        case mlir::acc::DataClause::acc_copyout:
+          createOutOp<mlir::acc::CopyoutOp>(cgf, create);
+          break;
+        }
       } else if (val.getDefiningOp<mlir::acc::DeclareLinkOp>()) {
         // Link has no exit clauses, and shouldn't be copied.
         continue;

clang/lib/CIR/CodeGen/CIRGenOpenACCClause.cpp

@@ -853,12 +853,16 @@ class OpenACCClauseCIREmitter final
             var, mlir::acc::DataClause::acc_copyout, clause.getModifierList(),
             /*structured=*/false,
             /*implicit=*/false);
+    } else if constexpr (isOneOfTypes<OpTy, mlir::acc::DeclareEnterOp>) {
+      for (const Expr *var : clause.getVarList())
+        addDataOperand<mlir::acc::CreateOp>(
+            var, mlir::acc::DataClause::acc_copyout, clause.getModifierList(),
+            /*structured=*/true,
+            /*implicit=*/false);
     } else if constexpr (isCombinedType<OpTy>) {
       applyToComputeOp(clause);
     } else {
-      // TODO: When we've implemented this for everything, switch this to an
-      // unreachable. declare construct remains.
-      return clauseNotImplemented(clause);
+      llvm_unreachable("Unknown construct kind in VisitCopyOutClause");
     }
   }