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/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
index 304d0ef..22bd80e 100644
--- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
+++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
@@ -449,7 +449,7 @@
     }
 
     if (MBBI != MBB.end()) {
-      MachineBasicBlock::iterator NextMBBI = next(MBBI);
+      MachineBasicBlock::iterator NextMBBI = llvm::next(MBBI);
       if ((Mode == ARM_AM::ia || Mode == ARM_AM::ib) &&
           isMatchingIncrement(NextMBBI, Base, Bytes, 0, Pred, PredReg)) {
         MI->getOperand(1).setImm(ARM_AM::getAM4ModeImm(Mode, true));
@@ -494,7 +494,7 @@
     }
 
     if (MBBI != MBB.end()) {
-      MachineBasicBlock::iterator NextMBBI = next(MBBI);
+      MachineBasicBlock::iterator NextMBBI = llvm::next(MBBI);
       if (Mode == ARM_AM::ia &&
           isMatchingIncrement(NextMBBI, Base, Bytes, 0, Pred, PredReg)) {
         MI->getOperand(1).setImm(ARM_AM::getAM5Opc(ARM_AM::ia, true, Offset));
@@ -604,7 +604,7 @@
   }
 
   if (!DoMerge && MBBI != MBB.end()) {
-    MachineBasicBlock::iterator NextMBBI = next(MBBI);
+    MachineBasicBlock::iterator NextMBBI = llvm::next(MBBI);
     if (!isAM5 &&
         isMatchingDecrement(NextMBBI, Base, Bytes, Limit, Pred, PredReg)) {
       DoMerge = true;