From b767d1eba89be1a11bf11a13ede2a761fc186cfa Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Sat, 1 Dec 2012 01:22:49 +0000
Subject: misched: Fix RegisterPressureTracker handling of DebugVals.

Assertion failed: (TopRPTracker.getPos() == RegionBegin && "bad initial Top tracker").
rdar://12790302.

llvm-svn: 169072
---
 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 cc7aabda3c3..0789a740d5e 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -603,7 +603,11 @@ void ScheduleDAGMI::initQueues() {
 
   SchedImpl->registerRoots();
 
+  // Advance past initial DebugValues.
+  assert(TopRPTracker.getPos() == RegionBegin && "bad initial Top tracker");
   CurrentTop = nextIfDebug(RegionBegin, RegionEnd);
+  TopRPTracker.setPos(CurrentTop);
+
   CurrentBottom = RegionEnd;
 }
 
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