improve portability to avoid conflicting with std::next in c++'0x.
Patch by Howard Hinnant!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 5eb9ca1..c6c1401 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -541,7 +541,7 @@
 void
 FastISel::FastEmitBranch(MachineBasicBlock *MSucc) {
   MachineFunction::iterator NextMBB =
-     next(MachineFunction::iterator(MBB));
+     llvm::next(MachineFunction::iterator(MBB));
 
   if (MBB->isLayoutSuccessor(MSucc)) {
     // The unconditional fall-through case, which needs no instructions.
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 273dbf0..25eb637 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -232,7 +232,7 @@
   // node is only legalized after all of its operands are legalized.
   DAG.AssignTopologicalOrder();
   for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
-       E = prior(DAG.allnodes_end()); I != next(E); ++I)
+       E = prior(DAG.allnodes_end()); I != llvm::next(E); ++I)
     LegalizeOp(SDValue(I, 0));
 
   // Finally, it's possible the root changed.  Get the new root.
diff --git a/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp b/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index 785c2ad..2dc7a54 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -79,7 +79,7 @@
   // node is only legalized after all of its operands are legalized.
   DAG.AssignTopologicalOrder();
   for (SelectionDAG::allnodes_iterator I = DAG.allnodes_begin(),
-       E = prior(DAG.allnodes_end()); I != next(E); ++I)
+       E = prior(DAG.allnodes_end()); I != llvm::next(E); ++I)
     LegalizeOp(SDValue(I, 0));
 
   // Finally, it's possible the root changed.  Get the new root.
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index c39437f..acbb5c9 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -789,7 +789,7 @@
           SDB->setCurDebugLoc(FastIS->getCurDebugLoc());
 
           bool HadTailCall = false;
-          SelectBasicBlock(LLVMBB, BI, next(BI), HadTailCall);
+          SelectBasicBlock(LLVMBB, BI, llvm::next(BI), HadTailCall);
 
           // If the call was emitted as a tail call, we're done with the block.
           if (HadTailCall) {