Enable end to end non-DPS testing

Implement python binding changes to allow execute function return
multiple returns. Update tests to use non-DPS style calling convention.

Also, enable end to end lowering by enabling conversion of closed alloc
group op to tensorrt dialect.

Miscellaneous fixes:
1. Add missing handling of `CallAllocOp` in EliminateShapeOps pass.
2. Skip non ranked tensor type function arguments while collecting host
   tensor arguments.
3. Temporarily add a pass to remove clone operation in MemRefToExecutor
   dialect conversion.
4. Relax memref creation for empty shape tensors.
5. Fix memref life returned from Lua function results. This required
   session allocator to track returned memref.

mlir-tensorrt/compiler/lib/Compiler/StableHloToExecutable.cpp

@@ -222,6 +222,10 @@ StableHLOToExecutableOptions::StableHLOToExecutableOptions(
       disallowHostTensorsInTensorRTClusters, llvm::cl::init(false),
       llvm::cl::desc("Don't allow TensorRt clusters to contain host tensor "
                      "calculations (but they can still be inputs)"));
+  addOption(
+      "enable-non-dps-returns", enableNonDPSReturns, llvm::cl::init(false),
+      llvm::cl::desc(
+          "allow tensorrt based output allocations using output allocator"));
   addOption("executor-index-bitwidth", executorIndexBitwidth,
             llvm::cl::init(64));
   addOption("device-compute-capability", deviceComputeCapability,
@@ -306,6 +310,7 @@ void StableHloToExecutableTask::buildStablehloClusteringPipeline(
   plan::StablehloClusteringPassOptions clusteringOpts{};
   clusteringOpts.disallowHostTensorsInTensorRTClusters =
       opts.disallowHostTensorsInTensorRTClusters;
+  clusteringOpts.enableNonDPSReturns = opts.enableNonDPSReturns;
   clusteringOpts.entrypoint = opts.entrypoint;
   plan::buildPlanSegmentationPipeline(pm, clusteringOpts);
 
@@ -339,7 +344,9 @@ void StableHloToExecutableTask::buildPostClusteringPipeline(
 
   // Perform bufferization.
   pm.addPass(createMemRefCastEliminationPass());
-  pm.addPass(plan::createPlanAllocTensorsPass());
+  plan::PlanAllocTensorsPassOptions allocTensorsOpts{};
+  allocTensorsOpts.enableNonDPSReturns = opts.enableNonDPSReturns;
+  pm.addPass(plan::createPlanAllocTensorsPass(allocTensorsOpts));
   pm.addPass(plan::createPlanBufferizePass());
   pm.addPass(createMemRefCastEliminationPass());
   pm.addPass(createCanonicalizerPass());
@@ -525,6 +532,11 @@ struct ClusteringPipelineCliOpts
       *this, "device-compute-capability",
       llvm::cl::desc("target device compute capability (SM version)"),
       llvm::cl::init(60)};
+  Option<bool> enableNonDPSReturns{
+      *this, "enable-non-dps-returns",
+      llvm::cl::desc(
+          "allow tensorrt based output allocations using output allocator"),
+      llvm::cl::init(false)};
   Option<int64_t> deviceMaxSharedMemoryPerBlockKb{
       *this, "device-max-smem-per-block",
       llvm::cl::desc("max shared memory per block (in kilobytes)"),
@@ -552,6 +564,7 @@ static StableHLOToExecutableOptions populateStablehloClusteringPipelineOpts(
   opts.deviceComputeCapability = cliOpts.deviceComputeCapability;
   opts.deviceMaxSharedMemoryPerBlockKb =
       cliOpts.deviceMaxSharedMemoryPerBlockKb;
+  opts.enableNonDPSReturns = cliOpts.enableNonDPSReturns;
   opts.shouldInferDeviceOptionsFromHost = cliOpts.inferDeviceOptionsFromHost;
   opts.entrypoint = cliOpts.entrypoint;
   return opts;

mlir-tensorrt/compiler/lib/Conversion/TensorRTToTensorRTRuntime/TensorRTToTensorRTRuntime.cpp

@@ -93,6 +93,8 @@ convertCallOp(Operation *op, IRRewriter &rewriter,
   SmallVector<int64_t> hostTensorArgs;
   for (auto [idx, arg] : llvm::enumerate(trtFunc.getArguments())) {
     const TensorKindLattice *kind = solver.lookupState<TensorKindLattice>(arg);
+    if (!isa<RankedTensorType>(arg.getType()))
+      continue;
     RankedTensorType rtt = cast<RankedTensorType>(arg.getType());
     // To be conservative, we only do this if type is i32 and num elements
     // <= 8.

mlir-tensorrt/compiler/lib/Dialect/Plan/Transforms/EliminateShapeOps.cpp

@@ -65,17 +65,26 @@ struct RemoveWithValuesRewriter : public OpRewritePattern<plan::WithValuesOp> {
 } // namespace
 
 /// Get a map from `tensorrt.func` functions to associated `tensorrt.call`
-/// operations.
-static llvm::DenseMap<func::FuncOp, SmallVector<tensorrt::CallOp>>
+/// and `tensorrt.call_alloc` operations.
+static llvm::DenseMap<func::FuncOp, SmallVector<Operation *>>
 getTensorRTFunctionCallMap(ModuleOp op, SymbolTableCollection &collection) {
-  llvm::DenseMap<func::FuncOp, SmallVector<tensorrt::CallOp>> map;
-  op->walk([&](tensorrt::CallOp callOp) {
-    func::FuncOp func = callOp.getFuncCallee(collection);
-    if (map.contains(func)) {
-      map[func].push_back(callOp);
+  llvm::DenseMap<func::FuncOp, SmallVector<Operation *>> map;
+  op->walk([&](Operation *callOp) {
+    if (!isa<tensorrt::CallOp, tensorrt::CallAllocOp>(callOp))
       return;
-    }
-    map.insert(std::make_pair(func, SmallVector<tensorrt::CallOp>{callOp}));
+
+    func::FuncOp func;
+    if (auto call = dyn_cast<tensorrt::CallOp>(callOp))
+      func = call.getFuncCallee(collection);
+    else if (auto callAlloc = dyn_cast<tensorrt::CallAllocOp>(callOp))
+      func = callAlloc.getFuncCallee(collection);
+    else
+      return;
+
+    if (map.count(func))
+      map[func].push_back(callOp);
+    else
+      map.insert({func, SmallVector<Operation *>{callOp}});
   });
   return map;
 }
@@ -84,7 +93,7 @@ getTensorRTFunctionCallMap(ModuleOp op, SymbolTableCollection &collection) {
 /// `tensorrt.call` operations.
 static LogicalResult removeUnusedArgs(SymbolTableCollection &collection,
                                       ModuleOp op, func::FuncOp funcOp,
-                                      ArrayRef<tensorrt::CallOp> callOps) {
+                                      ArrayRef<Operation *> callOps) {
   llvm::SmallBitVector unusedArgs(funcOp.getNumArguments(), 0);
   for (BlockArgument arg : funcOp.getArguments()) {
     if (arg.use_empty())
@@ -99,8 +108,17 @@ static LogicalResult removeUnusedArgs(SymbolTableCollection &collection,
     funcOp.eraseArgument(i);
 
     // Update the call ops.
-    for (tensorrt::CallOp callOp : callOps)
-      callOp.getInputsMutable().erase(i);
+    for (Operation *callOp : callOps) {
+      if (auto call = dyn_cast<tensorrt::CallOp>(callOp))
+        call.getInputsMutable().erase(i);
+      else if (auto callAlloc = dyn_cast<tensorrt::CallAllocOp>(callOp))
+        callAlloc.getInputsMutable().erase(i);
+      else {
+        llvm::errs() << "Unexpected operation type in callOps\n";
+        callOp->dump();
+        return failure();
+      }
+    }
   }
 
   return success();

mlir-tensorrt/compiler/lib/Dialect/Plan/Transforms/OutlineClusters.cpp

@@ -268,8 +268,82 @@ static LogicalResult outlineTensorRTRegion(RewriterBase &rewriter,
 
 static LogicalResult outlineTensorRTRegion(RewriterBase &rewriter,
                                            plan::InlineClosedAllocGroupOp op) {
-  return op.emitError("outlinining inline closed alloc group ops to tensorrt "
-                      "dialect is not yet implemented");
+  tensorrt::TensorRTModuleOp trtModuleOp = getOrCreateTensorRTModuleOp(op);
+  auto funcArgTypes = llvm::to_vector(TypeRange(op.getInputs()));
+  FailureOr<FunctionOpInterface> func = createOutlinedFunc(
+      rewriter, op.getLoc(), op, trtModuleOp, "tensorrt_cluster",
+      "cluster.tensorrt", TypeRange(op.getInputs()),
+      op.getYield()->getOperandTypes());
+  if (failed(func))
+    return failure();
+  assert(func->getFunctionBody().getBlocks().size() == 1 &&
+         "expected body with one block");
+  func->setPublic();
+
+  rewriter.setInsertionPoint(op);
+
+  auto callOp = rewriter.create<tensorrt::CallAllocOp>(
+      op.getLoc(), op.getResultTypes(), op.getInputs(),
+      SymbolRefAttr::get(trtModuleOp.getNameAttr(),
+                         {FlatSymbolRefAttr::get(*func)}));
+
+  // Populate the function arguments attributes.
+  for (unsigned i = 0; i < (*func).getNumArguments(); i++) {
+    BoundsAttr srcAttr = cast<BoundsAttr>(op.getInputAttrs()[i]);
+    // We may have scalar (index|signless int)-typed values since we haven't
+    // eliminated `plan.(with_shape|with_values)` ops yet.
+    if (!op.argHasTensorType(i) || srcAttr.isNone())
+      continue;
+    FailureOr<tensorrt::ShapeProfileAttr> boundAttr =
+        getTensorRTShapeProfile(srcAttr, op.getInputs()[i]);
+    if (failed(boundAttr))
+      return op->emitOpError("failed to create TensorRT shape profile "
+                             "attribute from Plan BoundsAttr for argument #")
+             << i << " (" << srcAttr << ")";
+    if (srcAttr.isShapeBound()) {
+      func->setArgAttr(i,
+                       tensorrt::TensorRTDialect::getShapeProfileArgAttrName(),
+                       *boundAttr);
+      continue;
+    }
+    assert(srcAttr.isValueBound() && "expected value bound or shape bound");
+    func->setArgAttr(
+        i, tensorrt::TensorRTDialect::getShapeTensorValueBoundsArgAttrName(),
+        *boundAttr);
+    func->setArgAttr(i, mlir::getHostTensorArgAttrName(),
+                     rewriter.getUnitAttr());
+  }
+
+  // Populate the function entry block.
+  rewriter.eraseBlock(&func->getFunctionBody().front());
+
+  // Move private decomposition funcs associated with all `stablehlo.composite`
+  // ops to the `tensorrt.module` op. This is needed since `tensorrt.module` op
+  // has its own symbol table.
+  SymbolTableCollection symbolTable;
+  for (auto compositeOp : op.getBody().getOps<stablehlo::CompositeOp>()) {
+    auto decompositionFunc = dyn_cast_if_present<func::FuncOp>(
+        symbolTable.lookupSymbolIn(op->getParentOfType<ModuleOp>(),
+                                   compositeOp.getDecompositionAttr()));
+    if (!decompositionFunc)
+      return emitError(compositeOp.getLoc())
+             << "failed to lookup stablehlo.composite decomposition "
+                "function: "
+             << compositeOp.getDecompositionAttr();
+    rewriter.moveOpAfter(decompositionFunc, func->getOperation());
+  }
+
+  // Move region op operations to the func body.
+  Operation *regionYieldOp = op.getYield();
+  rewriter.inlineRegionBefore(op.getRegion(), func->getFunctionBody(),
+                              func->getFunctionBody().end());
+  rewriter.setInsertionPoint(regionYieldOp);
+  rewriter.replaceOpWithNewOp<func::ReturnOp>(regionYieldOp,
+                                              regionYieldOp->getOperands());
+
+  // replace the original region results.
+  rewriter.replaceOp(op, callOp);
+  return success();
 }
 
 /// Create outlined functions for each `scf.execute_region` operation within

mlir-tensorrt/executor/include/mlir-executor-c/Runtime/Runtime.h

@@ -215,6 +215,11 @@ static inline bool mtrtRuntimeClientIsNull(MTRT_RuntimeClient client) {
   return !client.ptr;
 }
 
+/// Returns null client.
+static inline MTRT_RuntimeClient mtrtRuntimeClientGetNull() {
+  return MTRT_RuntimeClient{nullptr};
+}
+
 /// Creates a `MTRT_RuntimeClient`. Client must be alive for the lifetime of the
 /// program execution.
 /// The `stream` passed to the client is used by all underlying CUDA methods
@@ -308,6 +313,12 @@ static inline bool mtrtRuntimeValueIsNull(MTRT_RuntimeValue value) {
   return !value.ptr;
 }
 
+// Returns whether the RuntimeValue is MemRef.
+MLIR_CAPI_EXPORTED bool mtrtRuntimeValueIsMemRef(MTRT_RuntimeValue value);
+
+// Returns whether the RuntimeValue is Scalar.
+MLIR_CAPI_EXPORTED bool mtrtRuntimeValueIsScalar(MTRT_RuntimeValue value);
+
 /// Cast a MTRT_MemRefValue to a generic MTRT_RuntimeValue.
 MLIR_CAPI_EXPORTED MTRT_RuntimeValue
 mtrtMemRefCastToRuntimeValue(MTRT_MemRefValue memref);
@@ -391,16 +402,25 @@ static inline bool mtrtRuntimeSessionIsNull(MTRT_RuntimeSession session) {
   return !session.ptr;
 }
 
-/// Using `session`, execute the pubic function with the specified name.
-/// The `inArgs` and `outArgs` are arrays for input arguments and destination
-/// arguments, respectively. Input arguments may be MemRefs or scalars, but
-/// destination arguments must be MemRefs.
+/// Using `session`, execute the public function with the specified name.
+/// The `inArgs`, `outArgs`, and `results` are arrays for input arguments,
+/// output arguments, and return values, respectively. Arguments and results
+/// can be MemRefs, scalars, or other supported types. Both `outArgs` and
+/// `results` can be used simultaneously, allowing for functions that both
+/// modify arguments and return values.
 /// A stream may optionally be specified, otherwise pass the result of
 /// `mtrtStreamGetNull()`.
+///
+/// The `results` array must point to an array with at least the number of
+/// elements returned by mtrtRuntimeSessionGetNumResults for the given function.
 MLIR_CAPI_EXPORTED MTRT_Status mtrtRuntimeSessionExecuteFunction(
     MTRT_RuntimeSession session, MTRT_StringView name,
     const MTRT_RuntimeValue *inArgs, size_t numInArgs,
-    const MTRT_RuntimeValue *outArgs, size_t numOutArgs, MTRT_Stream stream);
+    const MTRT_RuntimeValue *outArgs, size_t numOutArgs,
+    MTRT_RuntimeValue *results, MTRT_Stream stream, MTRT_RuntimeClient client);
+
+MLIR_CAPI_EXPORTED MTRT_Status mtrtRuntimeSessionGetNumResults(
+    MTRT_RuntimeSession session, MTRT_StringView name, int64_t *numResults);
 
 //===----------------------------------------------------------------------===//
 // DLPack

mlir-tensorrt/executor/include/mlir-executor/Runtime/Backend/Lua/LuaRuntime.h

@@ -104,13 +104,6 @@ executeFunctionWithLuaBackend(LuaRuntimeSession &session, std::string_view name,
                               std::optional<CudaStream> stream = {},
                               std::optional<RuntimeClient *> client = {});
 
-// Parses the results of a function call, handling both scalar and MemRef return
-// types
-StatusOr<llvm::SmallVector<std::unique_ptr<RuntimeValue>>>
-parseResults(const sol::protected_function_result &pfr,
-             const FunctionSignatureView &sig,
-             std::optional<RuntimeClient *> client);
-
 } // namespace mlirtrt::runtime
 
 #endif // MLIR_TENSORRT_RUNTIME_BACKEND_LUA_LUARUNTIME_H

mlir-tensorrt/executor/lib/CAPI/Runtime/Runtime.cpp

@@ -675,6 +675,16 @@ MTRT_ScalarValue mtrtRuntimeValueDynCastToScalar(MTRT_RuntimeValue v) {
   return wrap(static_cast<ScalarValue *>(x));
 }
 
+bool mtrtRuntimeValueIsMemRef(MTRT_RuntimeValue value) {
+  RuntimeValue *x = unwrap(value);
+  return x->getKind() == RuntimeValue::Kind::MemRef;
+}
+
+bool mtrtRuntimeValueIsScalar(MTRT_RuntimeValue value) {
+  RuntimeValue *x = unwrap(value);
+  return x->getKind() == RuntimeValue::Kind::Scalar;
+}
+
 //===----------------------------------------------------------------------===//
 // MTRT_RuntimeSessionOptions
 //===----------------------------------------------------------------------===//
@@ -721,7 +731,8 @@ MTRT_Status mtrtRuntimeSessionDestroy(MTRT_RuntimeSession session) {
 MTRT_Status mtrtRuntimeSessionExecuteFunction(
     MTRT_RuntimeSession session, MTRT_StringView name,
     const MTRT_RuntimeValue *inArgs, size_t numInArgs,
-    const MTRT_RuntimeValue *outArgs, size_t numOutArgs, MTRT_Stream stream) {
+    const MTRT_RuntimeValue *outArgs, size_t numOutArgs,
+    MTRT_RuntimeValue *results, MTRT_Stream stream, MTRT_RuntimeClient client) {
   LuaRuntimeSession *cppSession =
       static_cast<LuaRuntimeSession *>(unwrap(session));
 
@@ -731,19 +742,36 @@ MTRT_Status mtrtRuntimeSessionExecuteFunction(
   llvm::SmallVector<RuntimeValue *> outArgValues =
       llvm::map_to_vector(llvm::ArrayRef(outArgs, numOutArgs),
                           [](MTRT_RuntimeValue arg) { return unwrap(arg); });
-
-  StatusOr<llvm::SmallVector<std::unique_ptr<RuntimeValue>>> result =
+  StatusOr<llvm::SmallVector<std::unique_ptr<RuntimeValue>>> resultValues =
       executeFunctionWithLuaBackend(
           *cppSession, std::string_view(name.data, name.length), inArgValues,
           outArgValues,
           !mtrtStreamIsNull(stream)
               ? std::optional(unwrap(stream)->getRawStream())
-              : std::nullopt);
-  if (!result.isOk())
-    return wrap(result.getStatus());
+              : std::nullopt,
+          !mtrtRuntimeClientIsNull(client) ? std::optional(unwrap(client))
+                                           : std::nullopt);
+  if (!resultValues.isOk())
+    return wrap(resultValues.getStatus());
+
+  for (size_t i = 0; i < resultValues->size(); ++i)
+    results[i] = wrap((*resultValues)[i].release());
 
   return mtrtStatusGetOk();
 }
+
+MTRT_Status mtrtRuntimeSessionGetNumResults(MTRT_RuntimeSession session,
+                                            MTRT_StringView name,
+                                            int64_t *numResults) {
+  LuaRuntimeSession *cppSession =
+      static_cast<LuaRuntimeSession *>(unwrap(session));
+  *numResults = cppSession->getExecutable()
+                    .getFunction(std::string_view(name.data, name.length))
+                    .getSignature()
+                    .getNumResults();
+  return mtrtStatusGetOk();
+}
+
 //===----------------------------------------------------------------------===//
 // MTRT_RuntimeClient
 //===----------------------------------------------------------------------===//

mlir-tensorrt/executor/lib/Conversion/MemRefToExecutor.cpp

@@ -24,6 +24,7 @@
 #include "mlir-executor/Conversion/ConvertToExecutorCommon.h"
 #include "mlir-executor/Conversion/Passes.h"
 #include "mlir-executor/Executor/IR/Executor.h"
+#include "mlir/Dialect/Bufferization/IR/Bufferization.h"
 #include "mlir/Dialect/MemRef/IR/MemRef.h"
 #include "mlir/IR/ImplicitLocOpBuilder.h"
 #include "mlir/IR/Matchers.h"
@@ -548,6 +549,21 @@ void executor::populateMemRefToExecutorPatterns(
 }
 
 namespace {
+
+class RemoveNoOpClonePattern : public OpRewritePattern<bufferization::CloneOp> {
+public:
+  using OpRewritePattern<bufferization::CloneOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(bufferization::CloneOp op,
+                                PatternRewriter &rewriter) const override {
+    if (op.getInput().getType() == op.getOutput().getType()) {
+      rewriter.replaceOp(op, op.getInput());
+      return success();
+    }
+    return failure();
+  }
+};
+
 /// Pass to convert `memref` to `executor` dialect operrations.
 class ConvertMemRefToExecutorPass
     : public mlir::executor::impl::ConvertMemRefToExecutorPassBase<
@@ -579,6 +595,10 @@ class ConvertMemRefToExecutorPass
     RewritePatternSet patterns(ctx);
     executor::populateMemRefToExecutorPatterns(
         patterns, typeConverter, allowUncheckedMemrefCastConversion);
+
+    // Remove unrealized cast and redundant clone operations.
+    patterns.add<RemoveNoOpClonePattern>(ctx);
+
     if (failed(applyPartialConversion(getOperation(), target,
                                       std::move(patterns))))
       return signalPassFailure();