From 9ad7e07a0fb565a8935ceaa2d266bd6e505203af Mon Sep 17 00:00:00 2001
From: Lang Hames <lhames@gmail.com>
Date: Tue, 6 Dec 2011 01:45:57 +0000
Subject: [PATCH] Update PBQP's analysis usage to reflect the requirements of
 the inline spiller.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145893 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegAllocPBQP.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 845ee12395a..db35ce06150 100644
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -37,10 +37,12 @@
 #include "Splitter.h"
 #include "VirtRegMap.h"
 #include "RegisterCoalescer.h"
+#include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/CodeGen/CalcSpillWeights.h"
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "llvm/CodeGen/LiveStackAnalysis.h"
 #include "llvm/CodeGen/RegAllocPBQP.h"
+#include "llvm/CodeGen/MachineDominators.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
@@ -444,6 +446,9 @@ void PBQPBuilderWithCoalescing::addVirtRegCoalesce(
 
 
 void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
+  au.setPreservesCFG();
+  au.addRequired<AliasAnalysis>();
+  au.addPreserved<AliasAnalysis>();
   au.addRequired<SlotIndexes>();
   au.addPreserved<SlotIndexes>();
   au.addRequired<LiveIntervals>();
@@ -454,6 +459,8 @@ void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
   au.addRequired<CalculateSpillWeights>();
   au.addRequired<LiveStacks>();
   au.addPreserved<LiveStacks>();
+  au.addRequired<MachineDominatorTree>();
+  au.addPreserved<MachineDominatorTree>();
   au.addRequired<MachineLoopInfo>();
   au.addPreserved<MachineLoopInfo>();
   if (pbqpPreSplitting)