On 5/3/23 21:10, Qing Zhao via Gcc-patches wrote: > Hi, Jan, > > You added the following patch into gcc10: > > From 34fbe3f0946f88828765184ed6581bda62cdf49f Mon Sep 17 00:00:00 2001 > From: Jan Hubicka <hubi...@ucw.cz> > Date: Thu, 5 Dec 2019 19:12:51 +0100 > Subject: [PATCH] cgraphclones.c (localize_profile): New function. > > * cgraphclones.c (localize_profile): New function. > (cgraph_node::create_clone): Use it for partial profiles. > * common.opt (fprofile-partial-training): New flag. > * doc/invoke.texi (-fprofile-partial-training): Document. > * ipa-cp.c (update_profiling_info): For partial profiles do not > set function profile to zero. > * profile.c (compute_branch_probabilities): With partial profile > watch if edge count is zero and turn all probabilities to guessed. > (compute_branch_probabilities): For partial profiles do not apply > profile when entry count is zero. > * tree-profile.c (tree_profiling): Only do > value_profile_transformations > when profile is read. > > My question is:
Hello. Why would anybody backport such change to unsupported code-stream of GCC 8? Generally speaking, I discourage from doing that. Martin > > Can this patch be back ported to GCC8 easily? I am wondering any significant > Change between GCC8 and GCC10 that might make the backporting very hard> > Thanks a lot for your help. > > Qing
