diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index 1aa02f00701..a11a8f5e44a 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -300,7 +300,6 @@ void LiveInterval::join(LiveInterval &Other, int *LHSValNoAssignments,
   // we want to avoid the interval scan if not.
   bool MustMapCurValNos = false;
   for (unsigned i = 0, e = getNumValNums(); i != e; ++i) {
-    assert(ValueNumberInfo[i].def != ~2U);
     if (ValueNumberInfo[i].def == ~1U) continue;  // tombstone value #
     if (i != (unsigned)LHSValNoAssignments[i]) {
       MustMapCurValNos = true;