diff options
Diffstat (limited to 'lib/CodeGen/DFAPacketizer.cpp')
| -rw-r--r-- | lib/CodeGen/DFAPacketizer.cpp | 91 |
1 files changed, 36 insertions, 55 deletions
diff --git a/lib/CodeGen/DFAPacketizer.cpp b/lib/CodeGen/DFAPacketizer.cpp index 5ff641c7c844..ff2f11353afd 100644 --- a/lib/CodeGen/DFAPacketizer.cpp +++ b/lib/CodeGen/DFAPacketizer.cpp @@ -23,10 +23,10 @@ // //===----------------------------------------------------------------------===// +#include "llvm/CodeGen/ScheduleDAGInstrs.h" #include "llvm/CodeGen/DFAPacketizer.h" #include "llvm/CodeGen/MachineInstr.h" #include "llvm/CodeGen/MachineInstrBundle.h" -#include "llvm/CodeGen/ScheduleDAGInstrs.h" #include "llvm/Target/TargetInstrInfo.h" #include "llvm/MC/MCInstrItineraries.h" using namespace llvm; @@ -100,22 +100,23 @@ void DFAPacketizer::reserveResources(llvm::MachineInstr *MI) { reserveResources(&MID); } -namespace { +namespace llvm { // DefaultVLIWScheduler - This class extends ScheduleDAGInstrs and overrides // Schedule method to build the dependence graph. class DefaultVLIWScheduler : public ScheduleDAGInstrs { public: DefaultVLIWScheduler(MachineFunction &MF, MachineLoopInfo &MLI, - MachineDominatorTree &MDT, bool IsPostRA); + MachineDominatorTree &MDT, bool IsPostRA); // Schedule - Actual scheduling work. void schedule(); }; -} // end anonymous namespace +} DefaultVLIWScheduler::DefaultVLIWScheduler( MachineFunction &MF, MachineLoopInfo &MLI, MachineDominatorTree &MDT, bool IsPostRA) : ScheduleDAGInstrs(MF, MLI, MDT, IsPostRA) { + CanHandleTerminators = true; } void DefaultVLIWScheduler::schedule() { @@ -129,49 +130,25 @@ VLIWPacketizerList::VLIWPacketizerList( bool IsPostRA) : TM(MF.getTarget()), MF(MF) { TII = TM.getInstrInfo(); ResourceTracker = TII->CreateTargetScheduleState(&TM, 0); - SchedulerImpl = new DefaultVLIWScheduler(MF, MLI, MDT, IsPostRA); + VLIWScheduler = new DefaultVLIWScheduler(MF, MLI, MDT, IsPostRA); } // VLIWPacketizerList Dtor VLIWPacketizerList::~VLIWPacketizerList() { - delete SchedulerImpl; - delete ResourceTracker; -} - -// ignorePseudoInstruction - ignore pseudo instructions. -bool VLIWPacketizerList::ignorePseudoInstruction(MachineInstr *MI, - MachineBasicBlock *MBB) { - if (MI->isDebugValue()) - return true; - - if (TII->isSchedulingBoundary(MI, MBB, MF)) - return true; - - return false; -} - -// isSoloInstruction - return true if instruction I must end previous -// packet. -bool VLIWPacketizerList::isSoloInstruction(MachineInstr *I) { - if (I->isInlineAsm()) - return true; - - return false; -} + if (VLIWScheduler) + delete VLIWScheduler; -// addToPacket - Add I to the current packet and reserve resource. -void VLIWPacketizerList::addToPacket(MachineInstr *MI) { - CurrentPacketMIs.push_back(MI); - ResourceTracker->reserveResources(MI); + if (ResourceTracker) + delete ResourceTracker; } // endPacket - End the current packet, bundle packet instructions and reset // DFA state. void VLIWPacketizerList::endPacket(MachineBasicBlock *MBB, - MachineInstr *I) { + MachineInstr *MI) { if (CurrentPacketMIs.size() > 1) { MachineInstr *MIFirst = CurrentPacketMIs.front(); - finalizeBundle(*MBB, MIFirst, I); + finalizeBundle(*MBB, MIFirst, MI); } CurrentPacketMIs.clear(); ResourceTracker->clearResources(); @@ -181,31 +158,35 @@ void VLIWPacketizerList::endPacket(MachineBasicBlock *MBB, void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB, MachineBasicBlock::iterator BeginItr, MachineBasicBlock::iterator EndItr) { - assert(MBB->end() == EndItr && "Bad EndIndex"); - - SchedulerImpl->enterRegion(MBB, BeginItr, EndItr, MBB->size()); - - // Build the DAG without reordering instructions. - SchedulerImpl->schedule(); - - // Remember scheduling units. - SUnits = SchedulerImpl->SUnits; + assert(VLIWScheduler && "VLIW Scheduler is not initialized!"); + VLIWScheduler->startBlock(MBB); + VLIWScheduler->enterRegion(MBB, BeginItr, EndItr, MBB->size()); + VLIWScheduler->schedule(); + + // Generate MI -> SU map. + MIToSUnit.clear(); + for (unsigned i = 0, e = VLIWScheduler->SUnits.size(); i != e; ++i) { + SUnit *SU = &VLIWScheduler->SUnits[i]; + MIToSUnit[SU->getInstr()] = SU; + } // The main packetizer loop. for (; BeginItr != EndItr; ++BeginItr) { MachineInstr *MI = BeginItr; - // Ignore pseudo instructions. - if (ignorePseudoInstruction(MI, MBB)) - continue; + this->initPacketizerState(); // End the current packet if needed. - if (isSoloInstruction(MI)) { + if (this->isSoloInstruction(MI)) { endPacket(MBB, MI); continue; } - SUnit *SUI = SchedulerImpl->getSUnit(MI); + // Ignore pseudo instructions. + if (this->ignorePseudoInstruction(MI, MBB)) + continue; + + SUnit *SUI = MIToSUnit[MI]; assert(SUI && "Missing SUnit Info!"); // Ask DFA if machine resource is available for MI. @@ -215,13 +196,13 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB, for (std::vector<MachineInstr*>::iterator VI = CurrentPacketMIs.begin(), VE = CurrentPacketMIs.end(); VI != VE; ++VI) { MachineInstr *MJ = *VI; - SUnit *SUJ = SchedulerImpl->getSUnit(MJ); + SUnit *SUJ = MIToSUnit[MJ]; assert(SUJ && "Missing SUnit Info!"); // Is it legal to packetize SUI and SUJ together. - if (!isLegalToPacketizeTogether(SUI, SUJ)) { + if (!this->isLegalToPacketizeTogether(SUI, SUJ)) { // Allow packetization if dependency can be pruned. - if (!isLegalToPruneDependencies(SUI, SUJ)) { + if (!this->isLegalToPruneDependencies(SUI, SUJ)) { // End the packet if dependency cannot be pruned. endPacket(MBB, MI); break; @@ -234,11 +215,11 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB, } // Add MI to the current packet. - addToPacket(MI); + BeginItr = this->addToPacket(MI); } // For all instructions in BB. // End any packet left behind. endPacket(MBB, EndItr); - - SchedulerImpl->exitRegion(); + VLIWScheduler->exitRegion(); + VLIWScheduler->finishBlock(); } |