Hello,
I'm working on an optimization and I encountered this interesting
behaviour. There are a couple of functions that are specialized when the
program is not compiled with PGO (-fprofile-generate and -fprofile-use)
However, when the program is compiled with PGO the compiler does not
specialize the function calls.
I printing the program just after materializing all clones.
I am running this version of GCC:
Author: GCC Administrator <gccad...@gcc.gnu.org>
Date: Fri Jul 10 00:16:28 2020 +0000
Daily bump.
I can imagine that the profiling information was used to determine that
specializing these functions is a bad tradeoff between binary size and
speed. But I do not know this for sure. How can I find out why these
functions were not specialized? (I.e. is there a threshold that wasn't
met, and if so, where is it located and what's its value?)
Thanks!
