From 5c482cd38f83f6fc1b95f86478e684e5f072399e Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 5 Apr 2011 23:43:14 +0000
Subject: [PATCH] Don't crash when a value is defined after the last split
 point.

llvm-svn: 128962
---
 llvm/lib/CodeGen/SplitKit.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/SplitKit.cpp b/llvm/lib/CodeGen/SplitKit.cpp
index 4b642883d47a..a3e065d1bd9a 100644
--- a/llvm/lib/CodeGen/SplitKit.cpp
+++ b/llvm/lib/CodeGen/SplitKit.cpp
@@ -673,7 +673,8 @@ void SplitEditor::overlapIntv(SlotIndex Start, SlotIndex End) {
          "Range cannot span basic blocks");
 
   // The complement interval will be extended as needed by extendRange().
-  markComplexMapped(0, ParentVNI);
+  if (ParentVNI)
+    markComplexMapped(0, ParentVNI);
   DEBUG(dbgs() << "    overlapIntv [" << Start << ';' << End << "):");
   RegAssign.insert(Start, End, OpenIdx);
   DEBUG(dump());