remove IntWrapper (#1964)

Summary:
I could not access https://github.com/NVlabs/cub/issues/172 to understand whether IntWrapper was still necessary but the comment is from 5 years ago and causes problems for the ROCm build.

Pull Request resolved: #1964

Reviewed By: MichaelRamamonjisoa

Differential Revision: D71937895

Pulled By: bottler

fbshipit-source-id: 5e0351e1bd8599b670436cd3464796eca33156f6

Author: jeffdaily

pytorch3d/csrc/pulsar/include/camera.h

@@ -70,11 +70,6 @@ struct CamGradInfo {
   float3 pixel_dir_y;
 };
 
-// TODO: remove once https://github.com/NVlabs/cub/issues/172 is resolved.
-struct IntWrapper {
-  int val;
-};
-
 } // namespace pulsar
 
 #endif

pytorch3d/csrc/pulsar/include/math.h

@@ -149,11 +149,6 @@ IHD CamGradInfo operator*(const CamGradInfo& a, const float& b) {
   return res;
 }
 
-IHD IntWrapper operator+(const IntWrapper& a, const IntWrapper& b) {
-  IntWrapper res;
-  res.val = a.val + b.val;
-  return res;
-}
 } // namespace pulsar
 
 #endif

pytorch3d/csrc/pulsar/include/renderer.backward.device.h

@@ -155,8 +155,8 @@ void backward(
         stream);
     CHECKLAUNCH();
     SUM_WS(
-        (IntWrapper*)(self->ids_sorted_d),
-        (IntWrapper*)(self->n_grad_contributions_d),
+        self->ids_sorted_d,
+        self->n_grad_contributions_d,
         static_cast<int>(num_balls),
         self->workspace_d,
         self->workspace_size,