feat(//core/conversion/evaluators): A whole bunch of new evaluators

Adds evaluators for:
- aten::eq
- aten::ne
- aten::lt
- aten::gt
- aten::le
- aten::ge
- aten::add
- aten::sub
- aten::mul
- aten::Bool
- aten::Float
- aten::__not__
- aten::__is__
- aten::__isnot__
- aten::numel
- aten::dim
- aten::div
- aten::floordiv
- aten::floor
- aten::warn
- prim::min
- prim::max
- prim::shape
- prim::unchecked_cast
- prim::Uninitalized
- prim::RaiseException

Signed-off-by: Naren Dasan <[email protected]>
Signed-off-by: Naren Dasan <[email protected]>

Author: narendasan

core/conversion/evaluators/BUILD

@@ -15,7 +15,8 @@ cc_library(
     srcs = [
         "NodeEvaluatorRegistry.cpp",
         "prim.cpp",
-        "aten.cpp"
+        "aten.cpp",
+        "eval_macros.h"
     ],
     deps = [
         "//core/util:prelude",

core/conversion/evaluators/NodeEvaluatorRegistry.cpp

@@ -30,6 +30,10 @@ class NodeEvaluatorRegistry {
 public:
     void RegisterEvaluator(torch::jit::NodeKind node_kind, EvalRegistration eval_reg) {
         LOG_DEBUG("Registering evaluator for " << node_kind.toQualString());
+        auto iter = evaluator_lut_.find(node_kind);
+        if (iter != evaluator_lut_.end()) {
+            TRTORCH_THROW_ERROR("Attempting to override already registered evaluator " << node_kind.toQualString() << ", merge implementations instead");
+        }
         evaluator_lut_[node_kind] = std::move(eval_reg);
     }