[Bug ipa/68857] [6 regression] FAIL: gcc.target/i386/mpx/vararg-8-nov.c -O3 -g (internal compiler error)

[ienkovich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68857

--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
IPA CP redirects edges for all callers including instrumentation thunks. 
Instrumentation thunks are always supposed to call their original nodes and
therefore should be skipped.