From 442c59f0a2fc3e596d0ce1f13b4a6849b2f46cc4 Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Thu, 4 Oct 2012 04:50:53 +0000
Subject: [PATCH] Fix reg mask slot test, and preserve LiveIntervals and
 VirtRegMap in the PBQP allocator. Fixes PR13945.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165201 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegAllocPBQP.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index fcdbce75d92..f2473681a5d 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -231,7 +231,7 @@ std::auto_ptr<PBQPRAProblem> PBQPBuilder::build(MachineFunction *mf,
         continue;
 
       // vregLI crosses a regmask operand that clobbers preg.
-      if (!regMaskOverlaps.empty() && !regMaskOverlaps.test(preg))
+      if (!regMaskOverlaps.empty() && regMaskOverlaps.test(preg))
         continue;
 
       // vregLI overlaps fixed regunit interference.
@@ -432,6 +432,7 @@ void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
   au.addRequired<SlotIndexes>();
   au.addPreserved<SlotIndexes>();
   au.addRequired<LiveIntervals>();
+  au.addPreserved<LiveIntervals>();
   //au.addRequiredID(SplitCriticalEdgesID);
   if (customPassID)
     au.addRequiredID(*customPassID);
@@ -443,6 +444,7 @@ void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
   au.addRequired<MachineLoopInfo>();
   au.addPreserved<MachineLoopInfo>();
   au.addRequired<VirtRegMap>();
+  au.addPreserved<VirtRegMap>();
   MachineFunctionPass::getAnalysisUsage(au);
 }