[Bug lto/61886] [4.8/4.9/5 Regression] LTO breaks fread with _FORTIFY_SOURCE=2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61886

--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The builtin-types.def part is unnecessary, I don't see internal-fn.def part.
Also, we might need to tune optimizations across the two internal calls (from
aliasing POV at least), we certainly want them to act as they have unspecified
other effects (i.e. we don't want DCE to delete them, or hoist them before
condition guarding them, on the other side, it would be nice if alias would
know they don't clobber nor read any memory, are leaf etc.).