!10972 fix memory leak of opencl conv2d

From: @ddwsky
Reviewed-by: @hangangqiang,@zhanghaibo5
Signed-off-by: @hangangqiang

mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d.cc

@@ -264,11 +264,11 @@ int Conv2DOpenCLKernel::InitFilter() {
         ConvertConvWeight4DTo7D<float, float>(weight_tensor->data_c(), packed_weight_, CO_, KH_, KW_, CI_,
                                               block_size_.C);
       }
-      FreeDequantedWeight();
     }
   }
 
   allocator->UnmapBuffer(packed_weight_);
+  FreeDequantedWeight();
   return RET_OK;
 }
 

mindspore/lite/src/runtime/kernel/opencl/kernel/conv2d_transpose.cc

@@ -125,6 +125,10 @@ void Conv2dTransposeOpenCLKernel::SetConstArgs() {
 }
 
 int Conv2dTransposeOpenCLKernel::InitWeights() {
+  auto ret = DequantWeight();
+  if (ret != RET_OK) {
+    return ret;
+  }
   ConvParameter *param = reinterpret_cast<ConvParameter *>(op_parameter_);
   int ci = in_tensors_[0]->shape()[3];
   int co = out_tensors_[0]->shape()[3];
@@ -180,6 +184,7 @@ int Conv2dTransposeOpenCLKernel::InitWeights() {
     }
   }
   allocator->UnmapBuffer(padWeight_);
+  FreeDequantedWeight();
 
   // init bias_(image2d mem)
   size_t im_dst_x, im_dst_y;

mindspore/lite/src/runtime/kernel/opencl/kernel/depthwise_conv2d.cc

@@ -93,10 +93,6 @@ int DepthwiseConv2dOpenCLKernel::Prepare() {
 }
 
 int DepthwiseConv2dOpenCLKernel::InitWeights() {
-  if (!in_tensors_.at(1)->IsConst()) {
-    MS_LOG(ERROR) << "DepthwiseConv2d don't support non-constant filter yet.";
-    return RET_ERROR;
-  }
   auto ret = DequantWeight();
   if (ret != RET_OK) {
     return ret;
@@ -124,7 +120,6 @@ int DepthwiseConv2dOpenCLKernel::InitWeights() {
     } else {  // int8 or int16
       std::function<int16_t(int16_t)> to_dtype = [](int16_t x) -> int16_t { return x; };
       PackNCHWToNC4HW4<int16_t, int16_t>(origin_weight, packed_weight_, 1, plane, out_info.C, to_dtype);
-      FreeDequantedWeight();
     }
   } else {
     packed_weight_ = allocator->Malloc(pack_weight_size * sizeof(float));
@@ -138,10 +133,10 @@ int DepthwiseConv2dOpenCLKernel::InitWeights() {
     } else {  // int8 or int16
       std::function<float(float)> to_dtype = [](float x) -> float { return x; };
       PackNCHWToNC4HW4<float, float>(origin_weight, packed_weight_, 1, plane, out_info.C, to_dtype);
-      FreeDequantedWeight();
     }
   }
   allocator->UnmapBuffer(packed_weight_);
+  FreeDequantedWeight();
 
   size_t dtype_size = sizeof(float);
   if (is_fp16 && in_tensors_.at(kBiasIndex)->data_type() == kNumberTypeFloat16) {