Do we need to do a loop invariant motion after loop interchange ?

[HAO CHEN GUI via Gcc-patches]

Hi,

I want to follow Lijia's work as I gained the performance benefit on 
some SPEC workloads by adding a im pass after loop interchange.  Could 
you send me the latest patches? I could do further testing. Thanks a lot.

https://gcc.gnu.org/pipermail/gcc/2020-February/232091.html