[Bug lto/60061] Different dump-ipa-cp-details without/with -flto for gfortran.dg/pr53787.f90

[jamborm at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60061

--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I see init cloned in both -fwhole-program ipa-cp dumps and in WPA
-flto dumps (i.e. when omitting the -S option).

Apparently, when creating fat LTO object file -fwhole-program does not
apply during the compilation phase (which is a bit confusing but I
tend to believe it is a good thing), we thus do not know that we would
clone init for all contexts and it is considered too cold for creating
an extra clone (which is also a good decision).

But non-lto -fwhole-program should be compared to -flto WPA stage, not
fat object optimization phase (assuming it is OK that -fwhole-program
in LTO only applies during the WPA phase).

Yes, jump functions are different exactly because of the condition
quoted above, there is little use analyzing them when they lead to
something unknown that is going to stay unknown.