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Temporarily revert r155364 until the upstream review can complete, per

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the stated developer policy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155373 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2012-04-23 18:28:57 +00:00
parent d410eaba04
commit e3fd2a36d9
2 changed files with 66 additions and 67 deletions
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89
lib/CodeGen/DFAPacketizer.cpp
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@ -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;
@ -100,23 +100,22 @@ void DFAPacketizer::reserveResources(llvm::MachineInstr *MI) {
reserveResources(&MID);
}
namespace llvm {
namespace {
// 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() {
@ -130,25 +129,49 @@ VLIWPacketizerList::VLIWPacketizerList(
bool IsPostRA) : TM(MF.getTarget()), MF(MF) {
TII = TM.getInstrInfo();
ResourceTracker = TII->CreateTargetScheduleState(&TM, 0);
VLIWScheduler = new DefaultVLIWScheduler(MF, MLI, MDT, IsPostRA);
SchedulerImpl = new DefaultVLIWScheduler(MF, MLI, MDT, IsPostRA);
}
// VLIWPacketizerList Dtor
VLIWPacketizerList::~VLIWPacketizerList() {
if (VLIWScheduler)
delete VLIWScheduler;
delete SchedulerImpl;
delete ResourceTracker;
}
if (ResourceTracker)
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;
}
// addToPacket - Add I to the current packet and reserve resource.
void VLIWPacketizerList::addToPacket(MachineInstr *MI) {
CurrentPacketMIs.push_back(MI);
ResourceTracker->reserveResources(MI);
}
// endPacket - End the current packet, bundle packet instructions and reset
// DFA state.
void VLIWPacketizerList::endPacket(MachineBasicBlock *MBB,
MachineInstr *MI) {
MachineInstr *I) {
if (CurrentPacketMIs.size() > 1) {
MachineInstr *MIFirst = CurrentPacketMIs.front();
finalizeBundle(*MBB, MIFirst, MI);
finalizeBundle(*MBB, MIFirst, I);
}
CurrentPacketMIs.clear();
ResourceTracker->clearResources();
@ -158,37 +181,31 @@ void VLIWPacketizerList::endPacket(MachineBasicBlock *MBB,
void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB,
MachineBasicBlock::iterator BeginItr,
MachineBasicBlock::iterator EndItr) {
assert(VLIWScheduler && "VLIW Scheduler is not initialized!");
VLIWScheduler->startBlock(MBB);
VLIWScheduler->enterRegion(MBB, BeginItr, EndItr, MBB->size());
VLIWScheduler->schedule();
VLIWScheduler->exitRegion();
assert(MBB->end() == EndItr && "Bad EndIndex");
// Generate MI -> SU map.
//std::map <MachineInstr*, SUnit*> MIToSUnit;
MIToSUnit.clear();
for (unsigned i = 0, e = VLIWScheduler->SUnits.size(); i != e; ++i) {
SUnit *SU = &VLIWScheduler->SUnits[i];
MIToSUnit[SU->getInstr()] = SU;
}
SchedulerImpl->enterRegion(MBB, BeginItr, EndItr, MBB->size());
// Build the DAG without reordering instructions.
SchedulerImpl->schedule();
// Remember scheduling units.
SUnits = SchedulerImpl->SUnits;
// The main packetizer loop.
for (; BeginItr != EndItr; ++BeginItr) {
MachineInstr *MI = BeginItr;
this->initPacketizerState();
// Ignore pseudo instructions.
if (ignorePseudoInstruction(MI, MBB))
continue;
// End the current packet if needed.
if (this->isSoloInstruction(MI)) {
if (isSoloInstruction(MI)) {
endPacket(MBB, MI);
continue;
}
// Ignore pseudo instructions.
if (this->ignorePseudoInstruction(MI, MBB))
continue;
SUnit *SUI = MIToSUnit[MI];
SUnit *SUI = SchedulerImpl->getSUnit(MI);
assert(SUI && "Missing SUnit Info!");
// Ask DFA if machine resource is available for MI.
@ -198,13 +215,13 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB,
for (std::vector<MachineInstr*>::iterator VI = CurrentPacketMIs.begin(),
VE = CurrentPacketMIs.end(); VI != VE; ++VI) {
MachineInstr *MJ = *VI;
SUnit *SUJ = MIToSUnit[MJ];
SUnit *SUJ = SchedulerImpl->getSUnit(MJ);
assert(SUJ && "Missing SUnit Info!");
// Is it legal to packetize SUI and SUJ together.
if (!this->isLegalToPacketizeTogether(SUI, SUJ)) {
if (!isLegalToPacketizeTogether(SUI, SUJ)) {
// Allow packetization if dependency can be pruned.
if (!this->isLegalToPruneDependencies(SUI, SUJ)) {
if (!isLegalToPruneDependencies(SUI, SUJ)) {
// End the packet if dependency cannot be pruned.
endPacket(MBB, MI);
break;
@ -217,9 +234,11 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB,
}
// Add MI to the current packet.
BeginItr = this->addToPacket(MI);
addToPacket(MI);
} // For all instructions in BB.
// End any packet left behind.
endPacket(MBB, EndItr);
SchedulerImpl->exitRegion();
}