[PowerPC] Make use of the TargetRecip system

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.

llvm-svn: 241985
diff --git a/llvm/lib/Target/PowerPC/PPCTargetMachine.h b/llvm/lib/Target/PowerPC/PPCTargetMachine.h
index 5c0f7e6..6496339 100644
--- a/llvm/lib/Target/PowerPC/PPCTargetMachine.h
+++ b/llvm/lib/Target/PowerPC/PPCTargetMachine.h
@@ -29,6 +29,8 @@
 private:
   std::unique_ptr<TargetLoweringObjectFile> TLOF;
   PPCABI TargetABI;
+  PPCSubtarget Subtarget;
+
   mutable StringMap<std::unique_ptr<PPCSubtarget>> SubtargetMap;
 
 public: