Artur Pilipenko db1717e452 [ValueTracking] An improvement to IR ValueTracking on Non-negative Integers
Since this change is known to cause performance degradations in some cases it's commited under a temporary flag which is turned off by default.

Patch by Li Huang

Differential Revision: https://reviews.llvm.org/D18777

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284022 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-12 16:18:43 +00:00
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