From: Andrew Trick <atrick@apple.com>
Date: Thu, 24 Jan 2013 02:09:57 +0000 (+0000)
Subject: MachineScheduler: enable biasCriticalPath for all DAGs.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=db4170697f866dc8620946c77828ef0804996c3d;p=oota-llvm.git

MachineScheduler: enable biasCriticalPath for all DAGs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173318 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index c949266b8b2..b9198e8fc6c 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -563,6 +563,10 @@ void ScheduleDAGMI::releaseRoots() {
   for (std::vector<SUnit>::iterator
          I = SUnits.begin(), E = SUnits.end(); I != E; ++I) {
     SUnit *SU = &(*I);
+
+    // Order predecessors so DFSResult follows the critical path.
+    SU->biasCriticalPath();
+
     // A SUnit is ready to top schedule if it has no predecessors.
     if (!I->NumPredsLeft && SU != &EntrySU)
       SchedImpl->releaseTopNode(SU);