From 92da42406e8135e2b133a85e10483a993889779b Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Thu, 24 Jan 2013 02:09:57 +0000
Subject: MachineScheduler: enable biasCriticalPath for all DAGs.

llvm-svn: 173318
---
 llvm/lib/CodeGen/MachineScheduler.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'llvm/lib/CodeGen/MachineScheduler.cpp')

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index c949266b8b2..b9198e8fc6c 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/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);
-- 
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