Created by: LeoZhao-Intel

System information -PaddlePaddle version: develop -CPU: including CPUMKL/OpenBlas/MKLDNN version -OS Platform : Linux

To Reproduce use test in paddle/fluid/inference/tests/api/ and observe how many mkldnn related irpasses are processed.

Describe your current behavior The rootcause is CpuPassStrategy uses copy constructor to re-initialize PassStrategy, the passes in previous instance is still kept, so mkldnn related irpasses are added multiple times.

Code to reproduce the issue Other info / logs