David Majnemer af44f02444 Merging r214385: ... ------------------------------------------------------------------------ r214385 | majnemer | 2014-07-30 21:49:29 -0700 (Wed, 30 Jul 2014) | 9 lines InstCombine: Correctly propagate NSW/NUW for x-(-A) -> x+A We can only propagate the nsw bits if both subtraction instructions are marked with the appropriate bit. N.B. We only propagate the nsw bit in InstCombine because the nuw case is already handled in InstSimplify. This fixes PR20189. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_35@223644 91177308-0d34-0410-b5e6-96231b3b80d8		2014-12-08 09:11:36 +00:00
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