[OpenACC][CIR] Implement independent/auto lowering for combined constr

These two are identical to 'seq', so their lowering is trivial to
implement, and just requires using the previous 'helper' function.

Author: erichkeane

clang/lib/CIR/CodeGen/CIRGenOpenACCClause.h

@@ -385,19 +385,23 @@ class OpenACCClauseCIREmitter final
   void VisitAutoClause(const OpenACCAutoClause &clause) {
     if constexpr (isOneOfTypes<OpTy, mlir::acc::LoopOp>) {
       operation.addAuto(builder.getContext(), lastDeviceTypeValues);
+    } else if constexpr (isCombinedType<OpTy>) {
+      applyToLoopOp(clause);
     } else {
       // TODO: When we've implemented this for everything, switch this to an
-      // unreachable. Routine, Combined constructs remain.
+      // unreachable. Routine, construct remains.
       return clauseNotImplemented(clause);
     }
   }
 
   void VisitIndependentClause(const OpenACCIndependentClause &clause) {
     if constexpr (isOneOfTypes<OpTy, mlir::acc::LoopOp>) {
       operation.addIndependent(builder.getContext(), lastDeviceTypeValues);
+    } else if constexpr (isCombinedType<OpTy>) {
+      applyToLoopOp(clause);
     } else {
       // TODO: When we've implemented this for everything, switch this to an
-      // unreachable. Routine, Combined constructs remain.
+      // unreachable. Routine construct remains.
       return clauseNotImplemented(clause);
     }
   }

clang/test/CIR/CodeGenOpenACC/combined.cpp

@@ -84,4 +84,54 @@ extern "C" void acc_combined(int N) {
   // CHECK: acc.terminator
   // CHECK-NEXT: } loc
 
+#pragma acc parallel loop auto
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.parallel combined(loop) {
+  // CHECK: acc.loop combined(parallel) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {auto_ = [#acc.device_type<none>]} loc
+  // CHECK: acc.yield
+  // CHECK-NEXT: } loc
+#pragma acc serial loop device_type(nvidia, radeon) auto
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.serial combined(loop) {
+  // CHECK: acc.loop combined(serial) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {auto_ = [#acc.device_type<nvidia>, #acc.device_type<radeon>]} loc
+  // CHECK: acc.yield
+  // CHECK-NEXT: } loc
+#pragma acc kernels loop auto device_type(nvidia, radeon)
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.kernels combined(loop) {
+  // CHECK: acc.loop combined(kernels) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {auto_ = [#acc.device_type<none>]} loc
+  // CHECK: acc.terminator
+  // CHECK-NEXT: } loc
+
+#pragma acc parallel loop independent
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.parallel combined(loop) {
+  // CHECK: acc.loop combined(parallel) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {independent = [#acc.device_type<none>]} loc
+  // CHECK: acc.yield
+  // CHECK-NEXT: } loc
+#pragma acc serial loop device_type(nvidia, radeon) independent
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.serial combined(loop) {
+  // CHECK: acc.loop combined(serial) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {independent = [#acc.device_type<nvidia>, #acc.device_type<radeon>]} loc
+  // CHECK: acc.yield
+  // CHECK-NEXT: } loc
+#pragma acc kernels loop independent device_type(nvidia, radeon)
+  for(unsigned I = 0; I < N; ++I);
+  // CHECK: acc.kernels combined(loop) {
+  // CHECK: acc.loop combined(kernels) {
+  // CHECK: acc.yield
+  // CHECK-NEXT: } attributes {independent = [#acc.device_type<none>]} loc
+  // CHECK: acc.terminator
+  // CHECK-NEXT: } loc
+
 }