feat(//core/conversion/converters/impl/shuffle): Implement aten::resize

Signed-off-by: Naren Dasan <naren@narendasan.com>
Signed-off-by: Naren Dasan <narens@nvidia.com>

core/conversion/converters/BUILD

@@ -17,6 +17,7 @@ cc_library(
         "impl/linear.cpp",
         "impl/pooling.cpp",
         "impl/reduce.cpp",
+        "impl/shuffle.cpp",
         "impl/softmax.cpp",
         "impl/unary.cpp",
     ],

core/conversion/converters/converters.h

@@ -6,6 +6,7 @@
 #include "torch/csrc/jit/runtime/custom_operator.h"
 #include "ATen/core/function_schema.h"
 
+#include "core/util/prelude.h"
 #include "core/conversion/conversionctx/ConversionCtx.h"
 
 namespace trtorch {

core/conversion/converters/impl/shuffle.cpp

@@ -0,0 +1,33 @@
+#include "core/conversion/converters/converters.h"
+
+namespace trtorch {
+namespace core {
+namespace conversion {
+namespace converters {
+namespace impl {
+namespace {
+
+static auto shuffle_registrations = RegisterNodeConversionPatterns()
+    .pattern({
+        "aten::reshape(Tensor self, int[] shape) -> (Tensor)",
+        [](ConversionCtx* ctx, const torch::jit::Node* n, args& args) -> bool {
+            auto in = args[0].ITensor();
+            auto new_shape = util::toDimsPad(args[1].unwrapToIntList(), 2);
+
+            auto shuffle = ctx->net->addShuffle(*in);
+            TRTORCH_CHECK(shuffle, "Unable to create shuffle layer from node: " << *n);
+            shuffle->setReshapeDimensions(new_shape);
+            shuffle->setName(util::node_info(n).c_str());
+
+            auto out_tensor = ctx->AssociateValueAndTensor(n->outputs()[0], shuffle->getOutput(0));
+            LOG_DEBUG("Output tensor shape: " << out_tensor->getDimensions());
+
+            return true;
+        }
+    });
+} // namespace
+} // namespace impl
+} // namespace converters
+} // namespace conversion
+} // namespace core
+} // namespace trtorch

core/conversion/converters/impl/softmax.cpp

@@ -1,4 +1,3 @@
-#include "core/util/prelude.h"
 #include "core/conversion/converters/converters.h"
 
 namespace trtorch {
@@ -29,12 +28,7 @@ static auto softmax_registrations = RegisterNodeConversionPatterns()
             auto softmax = ctx->net->addSoftMax(*in);
 
             TRTORCH_CHECK(softmax, "Unable to create softmax layer from node: " << *n);
-
-            if (!softmax) {
-                LOG_ERROR("Unable to create softmax layer from node: " << *n);
-                return false;
-            }
-            LOG_WARNING("Disregarding dtype argument, please verify");
+            LOG_DEBUG("Disregarding dtype argument");
 
             if (shape.size() > 3) {
                 softmax->setAxes(1 << (dim));
@@ -69,4 +63,4 @@ static auto softmax_registrations = RegisterNodeConversionPatterns()
 } // namespace converters
 } // namespace conversion
 } // namespace core
-} // trtorch
+} // namespace trtorch

core/util/trt_util.cpp

@@ -59,6 +59,29 @@ nvinfer1::Dims toDims(c10::List<int64_t> l) {
     return dims;
 }
 
+nvinfer1::Dims toDimsPad(c10::List<int64_t> l, uint64_t pad_to) {
+    if (l.size() > pad_to) {
+        LOG_DEBUG("Requested padding of dimensions to " << pad_to << " but found " << l.size() << " dimensions, not going to pad");
+        return toDims(l);
+    }
+
+    if (pad_to > nvinfer1::Dims::MAX_DIMS) {
+        //TODO: Handle this with exceptions or whatever
+        LOG_INTERNAL_ERROR("The list requested to be converted to nvinfer1::Dims exceeds the max number of dimensions for TensorRT");
+    }
+
+    nvinfer1::Dims dims;
+    dims.nbDims = pad_to;
+    for (size_t i = 0; i < pad_to - l.size(); i++) {
+        dims.d[i] = 1;
+    }
+
+    for (size_t i = pad_to - l.size(); i < pad_to; i++) {
+        dims.d[i] = l[i - (pad_to - l.size())];
+    }
+    return dims;
+}
+
 std::vector<int64_t> toVec(nvinfer1::Dims d) {
     std::vector<int64_t> dims;
     for (int i = 0; i < d.nbDims; i++) {

core/util/trt_util.h

@@ -78,6 +78,7 @@ namespace util {
 int64_t volume(const nvinfer1::Dims& d);
 
 nvinfer1::Dims toDimsPad(c10::IntArrayRef l, uint64_t pad_to);
+nvinfer1::Dims toDimsPad(c10::List<int64_t> l, uint64_t pad_to);
 nvinfer1::Dims toDims(c10::IntArrayRef l);
 nvinfer1::Dims toDims(c10::List<int64_t> l);
 nvinfer1::DimsHW toDimsHW(c10::List<int64_t> l);

tests/core/converters/BUILD

@@ -4,6 +4,10 @@ converter_test(
     name = "test_softmax"
 )
 
+converter_test(
+    name = "test_shuffle"
+)
+
 converter_test(
     name = "test_activation"
 )
@@ -36,6 +40,7 @@ test_suite(
     name = "test_converters",
     tests = [
         ":test_softmax",
+        ":test_shuffle",
         ":test_activation",
         ":test_pooling",
         ":test_unary",

tests/core/converters/test_shuffle.cpp

@@ -0,0 +1,29 @@
+#include <string>
+#include "gtest/gtest.h"
+#include "torch/csrc/jit/ir/irparser.h"
+#include "tests/util/util.h"
+#include "core/compiler.h"
+
+TEST(Converters, ATenReshapeConvertsCorrectly) {
+    const auto graph = R"IR(
+      graph(%0 : Tensor):
+        %1 : int = prim::Constant[value=3]()
+        %2 : int = prim::Constant[value=2]()
+        %3 : int[] = prim::ListConstruct(%1, %2)
+        %4 : Tensor = aten::reshape(%0, %3)
+        return (%4))IR";
+
+    auto g = std::make_shared<torch::jit::Graph>();
+    torch::jit::parseIR(graph, &*g);
+
+    auto in = at::randint(0, 5, {2, 3}, {at::kCUDA});
+    auto params = trtorch::core::conversion::get_named_params(g->inputs(), {});
+    auto jit_results = trtorch::tests::util::RunGraph(g, params, {in});
+
+    in = at::clone(in);
+    params = trtorch::core::conversion::get_named_params(g->inputs(), {});
+    auto trt_results = trtorch::tests::util::RunGraphEngine(g, params, {in});
+    auto trt = trt_results[0].reshape_as(jit_results[0]);
+
+    ASSERT_TRUE(trtorch::tests::util::almostEqual(jit_results[0], trt, 2e-6));
+}