From 7e63046ce9542d910b7eeb16fabc909182e1f81d Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Mon, 17 Jun 2013 21:45:07 +0000
Subject: [PATCH] MI-Sched: Remove another heuristic that is sensitive to queue
 order.

llvm-svn: 184130
---
 llvm/lib/CodeGen/MachineScheduler.cpp | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 5a9c4e45132c..55e58969a041 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -2113,15 +2113,9 @@ void ConvergingScheduler::tryCandidate(SchedCandidate &Cand,
     return;
 
   // Weak edges are for clustering and other constraints.
-  //
-  // Deferring TryCand here does not change Cand's reason. This is good in the
-  // sense that a bad candidate shouldn't affect a previous candidate's
-  // goodness, but bad in that it is assymetric and depends on queue order.
-  CandReason OrigReason = Cand.Reason;
   if (tryLess(getWeakLeft(TryCand.SU, Zone.isTop()),
               getWeakLeft(Cand.SU, Zone.isTop()),
               TryCand, Cand, Weak)) {
-    Cand.Reason = OrigReason;
     return;
   }
   // Avoid critical resource consumption and balance the schedule.