MachineScheduler: Add a way to disable the 'ReduceLatency' heuristic

[oota-llvm.git] / lib / CodeGen / MachineScheduler.cpp

diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 7e5ae05781eafff033a998658586103aac1d3f95..ee2dbc86bf1f760d1a543abe71b5a9b51069dc99 100644 (file)
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -2722,8 +2722,8 @@ void GenericScheduler::tryCandidate(SchedCandidate &Cand,
 
   // Avoid serializing long latency dependence chains.
   // For acyclic path limited loops, latency was already checked above.
-  if (Cand.Policy.ReduceLatency && !Rem.IsAcyclicLatencyLimited
-      && tryLatency(TryCand, Cand, Zone)) {
+  if (!RegionPolicy.DisableLatencyHeuristic && Cand.Policy.ReduceLatency &&
+      !Rem.IsAcyclicLatencyLimited && tryLatency(TryCand, Cand, Zone)) {
     return;
   }