diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index fcdbce7..f247368 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -231,7 +231,7 @@
         continue;
 
       // vregLI crosses a regmask operand that clobbers preg.
-      if (!regMaskOverlaps.empty() && !regMaskOverlaps.test(preg))
+      if (!regMaskOverlaps.empty() && regMaskOverlaps.test(preg))
         continue;
 
       // vregLI overlaps fixed regunit interference.
@@ -432,6 +432,7 @@
   au.addRequired<SlotIndexes>();
   au.addPreserved<SlotIndexes>();
   au.addRequired<LiveIntervals>();
+  au.addPreserved<LiveIntervals>();
   //au.addRequiredID(SplitCriticalEdgesID);
   if (customPassID)
     au.addRequiredID(*customPassID);
@@ -443,6 +444,7 @@
   au.addRequired<MachineLoopInfo>();
   au.addPreserved<MachineLoopInfo>();
   au.addRequired<VirtRegMap>();
+  au.addPreserved<VirtRegMap>();
   MachineFunctionPass::getAnalysisUsage(au);
 }