[Bug ipa/89330] IPA inliner touches released cgraph_edges

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89330

--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Created attachment 46544
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46544&action=edit
WIP patch

I have written another patch that removes the edges from the vector at
the time speculation is resolved rather than preventing creation of
the edges in the first place.

Unfortunately, the patch still trips over the added assert when LTO
bootstrapping D.  So we'll have to look into it and find out where the
edges get deleted other than in check_speculations before figuring out
whether this is the right approach or not.