He said *before* the last split point.

This should unbreak the build-self-4-mingw32 tester. I have a very
complicated test case that I will try to clean up.

llvm-svn: 135329
diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp
index d875f18..b0806a5 100644
--- a/llvm/lib/CodeGen/SplitKit.cpp
+++ b/llvm/lib/CodeGen/SplitKit.cpp
@@ -1280,7 +1280,7 @@
     } else {
       DEBUG(dbgs() << ", spill before last split point.\n");
       selectIntv(IntvIn);
-      SlotIndex Idx = leaveIntvAfter(LSP);
+      SlotIndex Idx = leaveIntvBefore(LSP);
       overlapIntv(Idx, BI.LastUse);
       useIntv(Start, Idx);
       assert((!LeaveBefore || Idx <= LeaveBefore) && "Interference");