added deferred shading foreach_tile

examples_cuda/deferred/kernels1.ispc

@@ -191,7 +191,6 @@ IntersectLightsWithTileMinMax(
 
     foreach (lightIndex = 0 ... numLights) 
     {
-
       float light_positionView_z = light_positionView_z_array[lightIndex];
       float light_attenuationEnd = light_attenuationEnd_array[lightIndex];
       float light_attenuationEndNeg = -light_attenuationEnd;

examples_cuda/deferred/main_cu.cpp

@@ -116,6 +116,10 @@ void createContext(const int deviceId = 0)
 
   // Create driver context
   checkCudaErrors(cuCtxCreate(&context, 0, device));
+    const size_t stackLimit = 4*1024;
+ //   const size_t heapLimit = 1024*1024*1024;
+  checkCudaErrors(cuCtxSetLimit(CU_LIMIT_STACK_SIZE,stackLimit));
+//  checkCudaErrors(cuCtxSetLimit(CU_LIMIT_MALLOC_HEAP_SIZE,heapLimit));
 }
 void destroyContext()
 {