[Bug ipa/86274] [7/8/9 Regression] SEGFAULT when logging std::to_string(NAN)

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86274

--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
The IPA (and first tree) dumps look all normal.  But even when I patch IPA-CP
to create a clone but not to modify it in any way, I still get the segfault. 
I'll look where we start diverging next.