[Bug bootstrap/83015] [8 regression] bootstrap comparison failure on ia64

[igor.v.tsimbalist at intel dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83015

--- Comment #6 from igor.v.tsimbalist at intel dot com ---
Andreas has sent this issue as a reply to my commit. I proposed a fix and asked
for approval. Here is my reply

https://gcc.gnu.org/ml/gcc-patches/2017-11/msg01647.html

I have attached the patch also.