https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89134
--- Comment #13 from Jiangning Liu <jiangning.liu at amperecomputing dot com> --- Feng already sent out the 1st patch at https://gcc.gnu.org/ml/gcc-patches/2019-03/msg00541.html . But the 2nd one is related to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89713 .