fix concat grad kernel

jacquesqiao · jacquesqiao · commit 762160bd8c38 · 2018-06-19T23:42:57.000+08:00
diff --git a/paddle/fluid/operators/math/concat.cu b/paddle/fluid/operators/math/concat.cu
@@ -209,7 +209,7 @@ class ConcatGradFunctor<platform::CUDADeviceContext, T> {
 
     outputs_cols[0] = 0;
     for (int i = 0; i < o_num; ++i) {
-      int t_col = outputs->at(i)->numel() / out_row;
+      int t_col = ref_inputs.at(i)->numel() / out_row;
       if (sameShape) {
         if (t_col != out0_col) sameShape = false;
       }

Original file line number	Diff line number	Diff line change
`@@ -209,7 +209,7 @@ class ConcatGradFunctor<platform::CUDADeviceContext, T> {`
`209`	`209`
`210`	`210`	`outputs_cols[0] = 0;`
`211`	`211`	`for (int i = 0; i < o_num; ++i) {`
`212`		`- int t_col = outputs->at(i)->numel() / out_row;`
	`212`	`+ int t_col = ref_inputs.at(i)->numel() / out_row;`
`213`	`213`	`if (sameShape) {`
`214`	`214`	`if (t_col != out0_col) sameShape = false;`
`215`	`215`	`}`