fix the bug in deleting buf tensors

source/network/XBackwardMath.cpp

@@ -451,10 +451,10 @@ void XMathGrad::GradDivDim(XTensor * node)
         DelTensorBuf(interGrad);
     }
 
-    DelTensorBuf(aTMP1);
-    DelTensorBuf(aTMP2);
-    DelTensorBuf(bTMP);
     DelTensorBuf(interGradTMP);
+    DelTensorBuf(bTMP);
+    DelTensorBuf(aTMP2);
+    DelTensorBuf(aTMP1);
 
     node->visitMark = NODE_FINISHED;
 }
@@ -499,8 +499,8 @@ void XMathGrad::GradMatrixMul(XTensor * node)
 
         a->Reshape(a->unitNum/a->GetDim(-1), a->GetDim(-1));
         c->Reshape(c->unitNum/c->GetDim(-1), c->GetDim(-1));
-        deda->Reshape(a->unitNum/a->GetDim(-1), a->GetDim(-1));
-        dedc->Reshape(c->unitNum/c->GetDim(-1), c->GetDim(-1));
+        deda->Reshape(deda->unitNum/deda->GetDim(-1), deda->GetDim(-1));
+        dedc->Reshape(dedc->unitNum/dedc->GetDim(-1), dedc->GetDim(-1));
 
         GradMatrixMul(a, deda, transA, b, dedb, transB, dedc, alpha);
 
@@ -796,6 +796,7 @@ gradient for normalize
 */
 void XMathGrad::GradNormalize(XTensor * node)
 {
+    ShowNTErrors("This is really a bad piece of code!!!");
     XLink &income = node->income;
     CheckNTErrors(income.tailNum == 5, "Wrong input tensor number for NORMALIZE!");
 
@@ -1274,10 +1275,10 @@ void XMathGrad::GradReduceSumSquared(XTensor * node)
     _ScaleAndShiftMe(f, -2.0F);
     _Multiply(node->grad, f, b->grad, 1.0F);
 
-    DelTensorBuf(c);
-    DelTensorBuf(d);
-    DelTensorBuf(e);
     DelTensorBuf(f);
+    DelTensorBuf(e);
+    DelTensorBuf(d);
+    DelTensorBuf(c);
 
     node->visitMark = NODE_FINISHED;
 }
@@ -1323,10 +1324,10 @@ void XMathGrad::GradReduceVariance(XTensor * node)
     _ScaleAndShiftMe(f, -2.0F /n);
     _Multiply(node->grad, f, b->grad, 1.0F);
 
-    DelTensorBuf(c);
-    DelTensorBuf(d);
-    DelTensorBuf(e);
     DelTensorBuf(f);
+    DelTensorBuf(e);
+    DelTensorBuf(d);
+    DelTensorBuf(c);
 
     node->visitMark = NODE_FINISHED;
 }