Add the PPC64 popcntd instruction

PPC ISA 2.06 (P7, A2, etc.) has a popcntd instruction. Add this instruction and
tell TTI about it so that popcount-loop recognition will know about it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178233 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCSubtarget.h b/lib/Target/PowerPC/PPCSubtarget.h
index 15885bd..070a9a9 100644
--- a/lib/Target/PowerPC/PPCSubtarget.h
+++ b/lib/Target/PowerPC/PPCSubtarget.h
@@ -79,6 +79,7 @@
   bool HasFSQRT;
   bool HasSTFIWX;
   bool HasISEL;
+  bool HasPOPCNTD;
   bool IsBookE;
   bool HasLazyResolverStubs;
   bool IsJITCodeModel;
@@ -159,6 +160,7 @@
   bool hasQPX() const { return HasQPX; }
   bool hasMFOCRF() const { return HasMFOCRF; }
   bool hasISEL() const { return HasISEL; }
+  bool hasPOPCNTD() const { return HasPOPCNTD; }
   bool isBookE() const { return IsBookE; }
 
   const Triple &getTargetTriple() const { return TargetTriple; }