refactor(//core/conversion): Seperate out special op cases

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

Author: narendasan

core/conversion/conversion.cpp

@@ -20,8 +20,11 @@ namespace conversion {
 bool isNodeConversionIgnored(const torch::jit::Node* n);
 
 bool OpSupported(const torch::jit::Node* n) {
-  return evaluators::shouldEvalAtConversionTime(n) || converters::node_is_convertable(n) ||
-      n->kind() == torch::jit::prim::Loop || n->kind() == torch::jit::prim::If;
+  return evaluators::shouldEvalAtConversionTime(n) || converters::node_is_convertable(n);
+}
+
+bool SpecialCaseSupport(const torch::jit::Node* n) {
+  return n->kind() == torch::jit::prim::Loop || n->kind() == torch::jit::prim::If;
 }
 
 c10::optional<torch::jit::IValue> EvaluateNode(ConversionCtx* ctx, const torch::jit::Node* n, int level, int limit) {
@@ -500,7 +503,7 @@ std::unordered_map<c10::OperatorName, std::string> GetUnsupportedOpsInBlock(cons
     auto schema = n->maybeSchema();
     // Some ops like torch::jit::prim::Loop, torch::jit::prim::If, torch::jit::prim::DictConstruct don't have a schema
     // but they are supported. torch::jit::prim::DictConstruct is supported via fallback only
-    if (!OpSupported(n)) {
+    if (!OpSupported(n) && !SpecialCaseSupport(n)) {
       if (schema) {
         std::stringstream ss;
         ss << *schema;