Justin Lebar 8d56f47cfe Don't do uint64_t(1) << 64 in maxUIntN. ...

Summary:
This shift is undefined behavior (and, as compiled by clang, gives the
wrong answer for maxUIntN(64)).

Reviewers: mkuper

Subscribers: llvm-commits, jroelofs, rsmith

Differential Revision: https://reviews.llvm.org/D22430

llvm-svn: 275656

2016-07-16 00:59:41 +00:00

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