Merge pull request #305 from NVIDIA/fix_epilogue_spill

fix epilogue register spill

include/cutlass/epilogue/threadblock/epilogue_with_reduction.h

@@ -703,7 +703,7 @@ private:
 
           int output_row = destination_iterator.thread_start_row() + row_offset;
 
-          fetch = (output_row < destination_iterator.extent().row() && column_guard);
+          fetch = (output_row < destination_iterator.extent_row() && column_guard);
         }
         else {
           fetch = true;
@@ -785,7 +785,7 @@ private:
 
           int output_row = destination_iterator.thread_start_row() + row_offset;
 
-          fetch = (output_row < destination_iterator.extent().row() && column_guard);
+          fetch = (output_row < destination_iterator.extent_row() && column_guard);
         }
         else {
           fetch = true;

include/cutlass/epilogue/threadblock/predicated_tile_iterator.h

@@ -172,7 +172,7 @@ private:
   Mask mask_;
 
   /// Extent of the matrix tile in rows
-  TensorCoord extent_;
+  Index extent_row_;
 
   /// A thread's starting row position (assuming steady-state predicates have been computed)
   Index thread_start_row_;
@@ -184,7 +184,7 @@ private:
   // Static asserts about internal strides
   //
 
-  static_assert(sizeof(extent_.row()) == 4, "Expected 32b extents");
+  static_assert(sizeof(extent_row_) == 4, "Expected 32b extents");
   static_assert(sizeof(thread_start_row_) == 4, "Expected 32b extents");
   static_assert(sizeof(PredicatedTileIteratorParams::stride) == 8, "Expected 64b strides");
 
@@ -209,12 +209,12 @@ public:
     int thread_idx,
     TensorCoord threadblock_offset = TensorCoord()
   ): 
-    params_(params),
-    extent_(extent)
+    params_(params)
   {
 
     TensorCoord thread_offset = ThreadMap::initial_offset(thread_idx) + threadblock_offset;
 
+    extent_row_ = extent.row();
     thread_start_row_ = thread_offset.row();
 
     // Initialize predicates
@@ -222,7 +222,7 @@ public:
     for (int c = 0; c < ThreadMap::Iterations::kColumn; ++c) {
 
       mask_.predicates[c] = ((thread_offset.column() 
-        + ThreadMap::Delta::kColumn * c) < extent_.column());
+        + ThreadMap::Delta::kColumn * c) < extent.column());
     }
 
     // Null pointer performs no accesses
@@ -268,7 +268,7 @@ public:
             + group * ThreadMap::Delta::kGroup 
             + cluster * ThreadMap::Delta::kCluster;
 
-          bool row_guard = ((row_offset + thread_start_row_) < extent_.row());
+          bool row_guard = ((row_offset + thread_start_row_) < extent_row_);
 
           AccessType *memory_pointer = reinterpret_cast<AccessType *>(byte_pointer + byte_offset);
 
@@ -332,7 +332,7 @@ public:
             + group * ThreadMap::Delta::kGroup 
             + cluster * ThreadMap::Delta::kCluster;
 
-          bool row_guard = ((row_offset + thread_start_row_) < extent_.row());
+          bool row_guard = ((row_offset + thread_start_row_) < extent_row_);
 
           AccessType *memory_pointer = reinterpret_cast<AccessType *>(byte_pointer + byte_offset);
 
@@ -379,8 +379,8 @@ public:
 
   /// Extent of the matrix in rows
   CUTLASS_DEVICE
-  TensorCoord extent() const {
-    return extent_;
+  Index extent_row() const {
+    return extent_row_;
   }
 
   /// Advances to the next position to load or store