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/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index d20f446..dd6fd7e 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -328,7 +328,7 @@
       if (I->second)
         OS << " in reg%" << I->second;
 
-      if (next(I) != E)
+      if (llvm::next(I) != E)
         OS << ", ";
     }
     OS << '\n';
@@ -342,7 +342,7 @@
       else
         OS << "%physreg" << *I;
 
-      if (next(I) != E)
+      if (llvm::next(I) != E)
         OS << " ";
     }
     OS << '\n';