FLush check command_queue_ is nullptr，test=develop (#8901)

714627034 · web-flow · commit 95825c16996c · 2022-04-24T11:43:07.000+08:00
diff --git a/lite/backends/opencl/cl_runtime.cc b/lite/backends/opencl/cl_runtime.cc
@@ -30,7 +30,8 @@ CLRuntime* CLRuntime::Global() {
 }
 
 void CLRuntime::Flush(const int index) {
-  if (is_cl_runtime_initialized_ && index % opencl_flush_period_ == 0) {
+  if (is_cl_runtime_initialized_ && index % opencl_flush_period_ == 0 &&
+      command_queue_ != nullptr) {
     command_queue_->flush();
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -30,7 +30,8 @@ CLRuntime* CLRuntime::Global() {`
`30`	`30`	`}`
`31`	`31`
`32`	`32`	`void CLRuntime::Flush(const int index) {`
`33`		`- if (is_cl_runtime_initialized_ && index % opencl_flush_period_ == 0) {`
	`33`	`+ if (is_cl_runtime_initialized_ && index % opencl_flush_period_ == 0 &&`
	`34`	`+ command_queue_ != nullptr) {`
`34`	`35`	`command_queue_->flush();`
`35`	`36`	`}`
`36`	`37`	`}`