Implement 32 & 64 bit versions of PPC atomic
binary primitives.

llvm-svn: 55343
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index b2f1836..2e458f9 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -282,6 +282,9 @@
 
     virtual MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
                                                         MachineBasicBlock *MBB);
+    MachineBasicBlock *EmitAtomicBinary(MachineInstr *MI, 
+                                        MachineBasicBlock *MBB, bool is64Bit,
+                                        unsigned BinOpcode);
     
     ConstraintType getConstraintType(const std::string &Constraint) const;
     std::pair<unsigned, const TargetRegisterClass*>