commit db4170697f866dc8620946c77828ef0804996c3d
author Andrew Trick <atrick@apple.com> Thu Jan 24 02:09:57 2013 +0000
committer Andrew Trick <atrick@apple.com> Thu Jan 24 02:09:57 2013 +0000
tree d60c982e7dda6157bc1e7413b3820742d658d3bb
parent 66658dd9a1ffe00a5f6e0afca7afb16ec6704ed3

MachineScheduler: enable biasCriticalPath for all DAGs.

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

lib/CodeGen/MachineScheduler.cpp

diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index c949266..b9198e8 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -563,6 +563,10 @@
   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);