misched: API for minimum vs. expected latency.

Minimum latency determines per-cycle scheduling groups.
Expected latency determines critical path and cost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158021 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 5218aa1..ec2b577 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1046,7 +1046,7 @@
       return true;  // Below MI
     unsigned DefDist = DDI->second;
     assert(Dist > DefDist && "Visited def already?");
-    if (TII->getInstrLatency(InstrItins, DefMI) > (int)(Dist - DefDist))
+    if (TII->getInstrLatency(InstrItins, DefMI) > (Dist - DefDist))
       return true;
   }
   return false;