Merging r328400:

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r328400 | echristo | 2018-03-23 17:07:38 -0700 (Fri, 23 Mar 2018) | 6 lines

Allow FDE references outside the +/-2GB range supported by PC relative
offsets for code models other than small/medium. For JIT application,
memory layout is less controlled and can result in truncations
otherwise.

Patch based on one by Olexa Bilaniuk!
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llvm-svn: 331714