fix(): need to fix gather converter

Signed-off-by: Abhiram Iyer <abhirami@nvidia.com>

Signed-off-by: Abhiram Iyer <abhi.iyer.ai@gmail.com>

core/conversion/converters/BUILD

@@ -28,7 +28,8 @@ cc_library(
         "impl/shuffle.cpp",
         "impl/softmax.cpp",
         "impl/unary.cpp",
-        "impl/interpolate.cpp"
+        "impl/interpolate.cpp",
+        "impl/select.cpp"
     ],
     deps = [
         "@tensorrt//:nvinfer",

core/conversion/converters/impl/select.cpp

@@ -0,0 +1,67 @@
+#include "torch/torch.h"
+#include "core/util/prelude.h"
+#include "core/conversion/converters/converters.h"
+#include "NvInfer.h"
+#include "torch/csrc/autograd/generated/variable_factories.h"
+
+#include <ATen/ATen.h>
+#include <vector>
+
+#include <csignal>
+
+namespace trtorch {
+namespace core {
+namespace conversion {
+namespace converters {
+namespace impl {
+namespace {
+
+auto select_registrations TRTORCH_UNUSED = RegisterNodeConversionPatterns()
+    .pattern({
+        "aten::select.int(Tensor(a) self, int dim, int index) -> (Tensor(a))",
+        [](ConversionCtx* ctx, const torch::jit::Node* n, args& args) -> bool {
+            std::cout << "select.int converter recognized" << std::endl;
+
+            auto in = args[0].ITensor();
+            auto axis  = args[1].unwrapToInt();
+            auto ind = (int32_t) args[2].unwrapToInt();
+
+            // tried: vector for input
+            //std::vector<int32_t> indices_input = {ind};
+
+            auto options = torch::TensorOptions().device(torch::kCUDA, 1).dtype(torch::kInt32);
+            at::Tensor indices = torch::tensor(torch::detail::TensorDataContainer(ind), options);
+
+            auto weights = Weights(ctx, indices);
+            // manually setting weights
+            // weights.data.type = nvinfer1::DataType::kINT32;
+
+            auto const_layer = ctx->net->addConstant(weights.shape, weights.data);
+            const_layer->setName(util::node_info(n).c_str());
+            // manually setting output type
+            // const_layer->setOutputType(0, nvinfer1::DataType::kINT32);
+
+            auto const_out = ctx->AssociateValueAndTensor(n->outputs()[0], const_layer->getOutput(0)); 
+
+            auto gather_layer = ctx->net->addGather(*in, *const_out, axis);
+            gather_layer->setName(util::node_info(n).c_str());
+            // manually setting output type
+            // gather_layer->setOutputType(0, nvinfer1::DataType::kINT32);
+
+            auto gather_output = ctx->AssociateValueAndTensor(n->outputs()[0], gather_layer->getOutput(0));
+
+            LOG_DEBUG("Output tensor shape: " << gather_output->getDimensions());
+
+            // for debugging
+            // std::raise(SIGTRAP);
+
+            return true;
+        }
+    });
+
+} // namespace
+} // namespace impl
+} // namespace converters
+} // namespace conversion
+} // namespace core
+} // namespace trtorch