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r238842 added the TargetRecip system for controlling use of reciprocal estimates for sqrt and division using a set of parameters that can be set by the frontend. Clang now supports a sophisticated -mrecip option, and this will allow that option to effectively control the relevant code-generation functionality of the PPC backend. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241985 91177308-0d34-0410-b5e6-96231b3b80d8
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