Introduce line editor library.

[oota-llvm.git] / lib / CodeGen / RegAllocPBQP.cpp

diff --git a/lib/CodeGen/RegAllocPBQP.cpp b/lib/CodeGen/RegAllocPBQP.cpp
index 15a88e224faa9906e10945bb1613813f0e095792..483f2e1ae8609eeed6fca19e67e878bba0eeb3b8 100644 (file)
--- a/lib/CodeGen/RegAllocPBQP.cpp
+++ b/lib/CodeGen/RegAllocPBQP.cpp
@@ -40,6 +40,7 @@
 #include "llvm/CodeGen/LiveIntervalAnalysis.h"
 #include "llvm/CodeGen/LiveRangeEdit.h"
 #include "llvm/CodeGen/LiveStackAnalysis.h"
+#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
 #include "llvm/CodeGen/MachineDominators.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/MachineLoopInfo.h"
@@ -94,9 +95,7 @@ public:
       : MachineFunctionPass(ID), builder(b.take()), customPassID(cPassID) {
     initializeSlotIndexesPass(*PassRegistry::getPassRegistry());
     initializeLiveIntervalsPass(*PassRegistry::getPassRegistry());
-    initializeCalculateSpillWeightsPass(*PassRegistry::getPassRegistry());
     initializeLiveStacksPass(*PassRegistry::getPassRegistry());
-    initializeMachineLoopInfoPass(*PassRegistry::getPassRegistry());
     initializeVirtRegMapPass(*PassRegistry::getPassRegistry());
   }
 
@@ -130,8 +129,8 @@ private:
   const TargetMachine *tm;
   const TargetRegisterInfo *tri;
   const TargetInstrInfo *tii;
-  const MachineLoopInfo *loopInfo;
   MachineRegisterInfo *mri;
+  const MachineBlockFrequencyInfo *mbfi;
 
   OwningPtr<Spiller> spiller;
   LiveIntervals *lis;
@@ -158,13 +157,13 @@ char RegAllocPBQP::ID = 0;
 
 } // End anonymous namespace.
 
-unsigned PBQPRAProblem::getVRegForNode(PBQP::Graph::ConstNodeItr node) const {
+unsigned PBQPRAProblem::getVRegForNode(PBQP::Graph::NodeId node) const {
   Node2VReg::const_iterator vregItr = node2VReg.find(node);
   assert(vregItr != node2VReg.end() && "No vreg for node.");
   return vregItr->second;
 }
 
-PBQP::Graph::NodeItr PBQPRAProblem::getNodeForVReg(unsigned vreg) const {
+PBQP::Graph::NodeId PBQPRAProblem::getNodeForVReg(unsigned vreg) const {
   VReg2Node::const_iterator nodeItr = vreg2Node.find(vreg);
   assert(nodeItr != vreg2Node.end() && "No node for vreg.");
   return nodeItr->second;
@@ -188,7 +187,7 @@ unsigned PBQPRAProblem::getPRegForOption(unsigned vreg, unsigned option) const {
 }
 
 PBQPRAProblem *PBQPBuilder::build(MachineFunction *mf, const LiveIntervals *lis,
-                                  const MachineLoopInfo *loopInfo,
+                                  const MachineBlockFrequencyInfo *mbfi,
                                   const RegSet &vregs) {
 
   LiveIntervals *LIS = const_cast<LiveIntervals*>(lis);
@@ -247,7 +246,7 @@ PBQPRAProblem *PBQPBuilder::build(MachineFunction *mf, const LiveIntervals *lis,
     }
 
     // Construct the node.
-    PBQP::Graph::NodeItr node =
+    PBQP::Graph::NodeId node =
       g.addNode(PBQP::Vector(vrAllowed.size() + 1, 0));
 
     // Record the mapping and allowed set in the problem.
@@ -273,7 +272,7 @@ PBQPRAProblem *PBQPBuilder::build(MachineFunction *mf, const LiveIntervals *lis,
 
       assert(!l2.empty() && "Empty interval in vreg set?");
       if (l1.overlaps(l2)) {
-        PBQP::Graph::EdgeItr edge =
+        PBQP::Graph::EdgeId edge =
           g.addEdge(p->getNodeForVReg(vr1), p->getNodeForVReg(vr2),
                     PBQP::Matrix(vr1Allowed.size()+1, vr2Allowed.size()+1, 0));
 
@@ -313,10 +312,10 @@ void PBQPBuilder::addInterferenceCosts(
 
 PBQPRAProblem *PBQPBuilderWithCoalescing::build(MachineFunction *mf,
                                                 const LiveIntervals *lis,
-                                                const MachineLoopInfo *loopInfo,
+                                                const MachineBlockFrequencyInfo *mbfi,
                                                 const RegSet &vregs) {
 
-  OwningPtr<PBQPRAProblem> p(PBQPBuilder::build(mf, lis, loopInfo, vregs));
+  OwningPtr<PBQPRAProblem> p(PBQPBuilder::build(mf, lis, mbfi, vregs));
   PBQP::Graph &g = p->getGraph();
 
   const TargetMachine &tm = mf->getTarget();
@@ -349,8 +348,7 @@ PBQPRAProblem *PBQPBuilderWithCoalescing::build(MachineFunction *mf,
       // value plucked randomly out of the air.
 
       PBQP::PBQPNum cBenefit =
-        copyFactor * LiveIntervals::getSpillWeight(false, true,
-                                                   loopInfo->getLoopDepth(mbb));
+        copyFactor * LiveIntervals::getSpillWeight(false, true, mbfi, mi);
 
       if (cp.isPhys()) {
         if (!mf->getRegInfo().isAllocatable(dst)) {
@@ -364,16 +362,16 @@ PBQPRAProblem *PBQPBuilderWithCoalescing::build(MachineFunction *mf,
         }
         if (pregOpt < allowed.size()) {
           ++pregOpt; // +1 to account for spill option.
-          PBQP::Graph::NodeItr node = p->getNodeForVReg(src);
+          PBQP::Graph::NodeId node = p->getNodeForVReg(src);
           addPhysRegCoalesce(g.getNodeCosts(node), pregOpt, cBenefit);
         }
       } else {
         const PBQPRAProblem::AllowedSet *allowed1 = &p->getAllowedSet(dst);
         const PBQPRAProblem::AllowedSet *allowed2 = &p->getAllowedSet(src);
-        PBQP::Graph::NodeItr node1 = p->getNodeForVReg(dst);
-        PBQP::Graph::NodeItr node2 = p->getNodeForVReg(src);
-        PBQP::Graph::EdgeItr edge = g.findEdge(node1, node2);
-        if (edge == g.edgesEnd()) {
+        PBQP::Graph::NodeId node1 = p->getNodeForVReg(dst);
+        PBQP::Graph::NodeId node2 = p->getNodeForVReg(src);
+        PBQP::Graph::EdgeId edge = g.findEdge(node1, node2);
+        if (edge == g.invalidEdgeId()) {
           edge = g.addEdge(node1, node2, PBQP::Matrix(allowed1->size() + 1,
                                                       allowed2->size() + 1,
                                                       0));
@@ -432,13 +430,14 @@ void RegAllocPBQP::getAnalysisUsage(AnalysisUsage &au) const {
   //au.addRequiredID(SplitCriticalEdgesID);
   if (customPassID)
     au.addRequiredID(*customPassID);
-  au.addRequired<CalculateSpillWeights>();
   au.addRequired<LiveStacks>();
   au.addPreserved<LiveStacks>();
-  au.addRequired<MachineDominatorTree>();
-  au.addPreserved<MachineDominatorTree>();
+  au.addRequired<MachineBlockFrequencyInfo>();
+  au.addPreserved<MachineBlockFrequencyInfo>();
   au.addRequired<MachineLoopInfo>();
   au.addPreserved<MachineLoopInfo>();
+  au.addRequired<MachineDominatorTree>();
+  au.addPreserved<MachineDominatorTree>();
   au.addRequired<VirtRegMap>();
   au.addPreserved<VirtRegMap>();
   MachineFunctionPass::getAnalysisUsage(au);
@@ -475,11 +474,11 @@ bool RegAllocPBQP::mapPBQPToRegAlloc(const PBQPRAProblem &problem,
   const PBQP::Graph &g = problem.getGraph();
   // Iterate over the nodes mapping the PBQP solution to a register
   // assignment.
-  for (PBQP::Graph::ConstNodeItr node = g.nodesBegin(),
-                                 nodeEnd = g.nodesEnd();
-       node != nodeEnd; ++node) {
-    unsigned vreg = problem.getVRegForNode(node);
-    unsigned alloc = solution.getSelection(node);
+  for (PBQP::Graph::NodeItr nodeItr = g.nodesBegin(),
+                            nodeEnd = g.nodesEnd();
+       nodeItr != nodeEnd; ++nodeItr) {
+    unsigned vreg = problem.getVRegForNode(*nodeItr);
+    unsigned alloc = solution.getSelection(*nodeItr);
 
     if (problem.isPRegOption(vreg, alloc)) {
       unsigned preg = problem.getPRegForOption(vreg, alloc);
@@ -489,7 +488,7 @@ bool RegAllocPBQP::mapPBQPToRegAlloc(const PBQPRAProblem &problem,
       vrm->assignVirt2Phys(vreg, preg);
     } else if (problem.isSpillOption(vreg, alloc)) {
       vregsToAlloc.erase(vreg);
-      SmallVector<LiveInterval*, 8> newSpills;
+      SmallVector<unsigned, 8> newSpills;
       LiveRangeEdit LRE(&lis->getInterval(vreg), newSpills, *mf, *lis, vrm);
       spiller->spill(LRE);
 
@@ -500,9 +499,10 @@ bool RegAllocPBQP::mapPBQPToRegAlloc(const PBQPRAProblem &problem,
       // allocate.
       for (LiveRangeEdit::iterator itr = LRE.begin(), end = LRE.end();
            itr != end; ++itr) {
-        assert(!(*itr)->empty() && "Empty spill range.");
-        DEBUG(dbgs() << PrintReg((*itr)->reg, tri) << " ");
-        vregsToAlloc.insert((*itr)->reg);
+        LiveInterval &li = lis->getInterval(*itr);
+        assert(!li.empty() && "Empty spill range.");
+        DEBUG(dbgs() << PrintReg(li.reg, tri) << " ");
+        vregsToAlloc.insert(li.reg);
       }
 
       DEBUG(dbgs() << ")\n");
@@ -546,7 +546,10 @@ bool RegAllocPBQP::runOnMachineFunction(MachineFunction &MF) {
 
   lis = &getAnalysis<LiveIntervals>();
   lss = &getAnalysis<LiveStacks>();
-  loopInfo = &getAnalysis<MachineLoopInfo>();
+  mbfi = &getAnalysis<MachineBlockFrequencyInfo>();
+
+  calculateSpillWeightsAndHints(*lis, MF, getAnalysis<MachineLoopInfo>(),
+                                *mbfi);
 
   vrm = &getAnalysis<VirtRegMap>();
   spiller.reset(createInlineSpiller(*this, MF, *vrm));
@@ -584,7 +587,7 @@ bool RegAllocPBQP::runOnMachineFunction(MachineFunction &MF) {
       DEBUG(dbgs() << "  PBQP Regalloc round " << round << ":\n");
 
       OwningPtr<PBQPRAProblem> problem(
-        builder->build(mf, lis, loopInfo, vregsToAlloc));
+        builder->build(mf, lis, mbfi, vregsToAlloc));
 
 #ifndef NDEBUG
       if (pbqpDumpGraphs) {