commit 61f4d6439c16a65a51495699bca2f0be37459df4
author Matthias Braun <matze@braunis.de> Thu Oct 22 18:07:31 2015 +0000
committer Matthias Braun <matze@braunis.de> Thu Oct 22 18:07:31 2015 +0000
tree 86d547aa8ce3cdb66c6cc49c2649c29db4417cb4
parent 78945d0721ea631bfb4535ea36058567a07a6991

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

llvm-svn: 251037

llvm/lib/CodeGen/MachineScheduler.cpp

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 7e5ae05..ee2dbc8 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -2722,8 +2722,8 @@
 
   // 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;
   }