[C++11] Replace llvm::next and llvm::prior with std::next and std::prev.

Remove the old functions.

llvm-svn: 202636
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp
index 35ba7ff..c6f0133 100644
--- a/llvm/lib/CodeGen/MachineCSE.cpp
+++ b/llvm/lib/CodeGen/MachineCSE.cpp
@@ -229,7 +229,7 @@
   // Next, collect all defs into PhysDefs.  If any is already in PhysRefs
   // (which currently contains only uses), set the PhysUseDef flag.
   PhysUseDef = false;
-  MachineBasicBlock::const_iterator I = MI; I = llvm::next(I);
+  MachineBasicBlock::const_iterator I = MI; I = std::next(I);
   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
     const MachineOperand &MO = MI->getOperand(i);
     if (!MO.isReg() || !MO.isDef())
@@ -280,7 +280,7 @@
     }
     CrossMBB = true;
   }
-  MachineBasicBlock::const_iterator I = CSMI; I = llvm::next(I);
+  MachineBasicBlock::const_iterator I = CSMI; I = std::next(I);
   MachineBasicBlock::const_iterator E = MI;
   MachineBasicBlock::const_iterator EE = CSMBB->end();
   unsigned LookAheadLeft = LookAheadLimit;