Fix the sense of joinable


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15196 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 361210e..ed90fca 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -577,7 +577,7 @@
         IntA.containsOneValue() && IntB.containsOneValue();
 
       unsigned MIDefIdx = getDefIndex(getInstructionIndex(mi));
-      if ((TriviallyJoinable || !IntB.joinable(IntA, MIDefIdx)) &&
+      if ((TriviallyJoinable || IntB.joinable(IntA, MIDefIdx)) &&
           !overlapsAliases(&IntA, &IntB)) {
         IntB.join(IntA, MIDefIdx);