[RTG] Add BagType CAPI and Python Bindings (#7888)

Author: maerhart

include/circt-c/Dialect/RTG.h

@@ -37,6 +37,12 @@ MLIR_CAPI_EXPORTED bool rtgTypeIsASet(MlirType type);
 /// Creates an RTG set type in the context.
 MLIR_CAPI_EXPORTED MlirType rtgSetTypeGet(MlirType elementType);
 
+/// If the type is an RTG bag.
+MLIR_CAPI_EXPORTED bool rtgTypeIsABag(MlirType type);
+
+/// Creates an RTG bag type in the context.
+MLIR_CAPI_EXPORTED MlirType rtgBagTypeGet(MlirType elementType);
+
 /// If the type is an RTG dict.
 MLIR_CAPI_EXPORTED bool rtgTypeIsADict(MlirType type);
 

integration_test/Bindings/Python/dialects/rtg.py

@@ -4,7 +4,7 @@
 import circt
 
 from circt.dialects import rtg, rtgtest
-from circt.ir import Context, Location, Module, InsertionPoint, Block, StringAttr, TypeAttr
+from circt.ir import Context, Location, Module, InsertionPoint, Block, StringAttr, TypeAttr, IndexType
 from circt.passmanager import PassManager
 from circt import rtgtool_support as rtgtool
 
@@ -77,3 +77,18 @@
   # CHECK: rtg.test @test_name : !rtg.dict<> {
   # CHECK-NEXT: }
   print(m)
+
+with Context() as ctx, Location.unknown():
+  circt.register_dialects(ctx)
+  m = Module.create()
+  with InsertionPoint(m.body):
+    indexTy = IndexType.get()
+    sequenceTy = rtg.SequenceType.get()
+    setTy = rtg.SetType.get(indexTy)
+    bagTy = rtg.BagType.get(indexTy)
+    seq = rtg.SequenceOp('seq')
+    Block.create_at_start(seq.bodyRegion, [sequenceTy, setTy, bagTy])
+
+  # CHECK: rtg.sequence @seq
+  # CHECK: (%{{.*}}: !rtg.sequence, %{{.*}}: !rtg.set<index>, %{{.*}}: !rtg.bag<index>):
+  print(m)

lib/Bindings/Python/RTGModule.cpp

@@ -40,6 +40,14 @@ void circt::python::populateDialectRTGSubmodule(py::module &m) {
           },
           py::arg("self"), py::arg("element_type"));
 
+  mlir_type_subclass(m, "BagType", rtgTypeIsABag)
+      .def_classmethod(
+          "get",
+          [](py::object cls, MlirType elementType) {
+            return cls(rtgBagTypeGet(elementType));
+          },
+          py::arg("self"), py::arg("element_type"));
+
   mlir_type_subclass(m, "DictType", rtgTypeIsADict)
       .def_classmethod(
           "get",

lib/CAPI/Dialect/RTG.cpp

@@ -46,6 +46,16 @@ MlirType rtgSetTypeGet(MlirType elementType) {
   return wrap(SetType::get(ty.getContext(), ty));
 }
 
+// BagType
+//===----------------------------------------------------------------------===//
+
+bool rtgTypeIsABag(MlirType type) { return isa<BagType>(unwrap(type)); }
+
+MlirType rtgBagTypeGet(MlirType elementType) {
+  auto ty = unwrap(elementType);
+  return wrap(BagType::get(ty.getContext(), ty));
+}
+
 // DictType
 //===----------------------------------------------------------------------===//
 

test/CAPI/rtg.c

@@ -34,6 +34,16 @@ static void testSetType(MlirContext ctx) {
   mlirTypeDump(setTy);
 }
 
+static void testBagType(MlirContext ctx) {
+  MlirType elTy = mlirIntegerTypeGet(ctx, 32);
+  MlirType bagTy = rtgBagTypeGet(elTy);
+
+  // CHECK: is_bag
+  fprintf(stderr, rtgTypeIsABag(bagTy) ? "is_bag\n" : "isnot_bag\n");
+  // CHECK: !rtg.bag<i32>
+  mlirTypeDump(bagTy);
+}
+
 static void testDictType(MlirContext ctx) {
   MlirType elTy = mlirIntegerTypeGet(ctx, 32);
   MlirAttribute name0 =
@@ -62,6 +72,7 @@ int main(int argc, char **argv) {
 
   testSequenceType(ctx);
   testSetType(ctx);
+  testBagType(ctx);
   testDictType(ctx);
 
   mlirContextDestroy(ctx);