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/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp
index a2fe9b0..044bd4b 100644
--- a/lib/Target/X86/X86FloatingPoint.cpp
+++ b/lib/Target/X86/X86FloatingPoint.cpp
@@ -289,7 +289,7 @@
         while (Start != BB.begin() && prior(Start) != PrevI) --Start;
         errs() << "Inserted instructions:\n\t";
         Start->print(errs(), &MF.getTarget());
-        while (++Start != next(I)) {}
+        while (++Start != llvm::next(I)) {}
       }
       dumpStack();
     );