#include "llvm/Analysis/RegionPass.h"
#include "llvm/Analysis/RegionIterator.h"
#include "llvm/Support/Timer.h"
#define DEBUG_TYPE "regionpassmgr"
#include "llvm/Support/Debug.h"
using namespace llvm;
char RGPassManager::ID = 0;
RGPassManager::RGPassManager()
: FunctionPass(ID), PMDataManager() {
skipThisRegion = false;
redoThisRegion = false;
RI = NULL;
CurrentRegion = NULL;
}
static void addRegionIntoQueue(Region *R, std::deque<Region *> &RQ) {
RQ.push_back(R);
for (Region::iterator I = R->begin(), E = R->end(); I != E; ++I)
addRegionIntoQueue(*I, RQ);
}
void RGPassManager::getAnalysisUsage(AnalysisUsage &Info) const {
Info.addRequired<RegionInfo>();
Info.setPreservesAll();
}
bool RGPassManager::runOnFunction(Function &F) {
RI = &getAnalysis<RegionInfo>();
bool Changed = false;
populateInheritedAnalysis(TPM->activeStack);
addRegionIntoQueue(RI->getTopLevelRegion(), RQ);
if (RQ.empty()) return false;
for (std::deque<Region *>::const_iterator I = RQ.begin(), E = RQ.end();
I != E; ++I) {
Region *R = *I;
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
RegionPass *RP = (RegionPass *)getContainedPass(Index);
Changed |= RP->doInitialization(R, *this);
}
}
while (!RQ.empty()) {
CurrentRegion = RQ.back();
skipThisRegion = false;
redoThisRegion = false;
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
RegionPass *P = (RegionPass*)getContainedPass(Index);
dumpPassInfo(P, EXECUTION_MSG, ON_REGION_MSG,
CurrentRegion->getNameStr());
dumpRequiredSet(P);
initializeAnalysisImpl(P);
{
PassManagerPrettyStackEntry X(P, *CurrentRegion->getEntry());
TimeRegion PassTimer(getPassTimer(P));
Changed |= P->runOnRegion(CurrentRegion, *this);
}
if (Changed)
dumpPassInfo(P, MODIFICATION_MSG, ON_REGION_MSG,
skipThisRegion ? "<deleted>" :
CurrentRegion->getNameStr());
dumpPreservedSet(P);
if (!skipThisRegion) {
{
TimeRegion PassTimer(getPassTimer(P));
CurrentRegion->verifyRegion();
}
verifyPreservedAnalysis(P);
}
removeNotPreservedAnalysis(P);
recordAvailableAnalysis(P);
removeDeadPasses(P,
skipThisRegion ? "<deleted>" :
CurrentRegion->getNameStr(),
ON_REGION_MSG);
if (skipThisRegion)
break;
}
if (skipThisRegion)
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
freePass(P, "<deleted>", ON_REGION_MSG);
}
RQ.pop_back();
if (redoThisRegion)
RQ.push_back(CurrentRegion);
RI->clearNodeCache();
}
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
RegionPass *P = (RegionPass*)getContainedPass(Index);
Changed |= P->doFinalization();
}
DEBUG(
dbgs() << "\nRegion tree of function " << F.getName()
<< " after all region Pass:\n";
RI->dump();
dbgs() << "\n";
);
return Changed;
}
void RGPassManager::dumpPassStructure(unsigned Offset) {
errs().indent(Offset*2) << "Region Pass Manager\n";
for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
Pass *P = getContainedPass(Index);
P->dumpPassStructure(Offset + 1);
dumpLastUses(P, Offset+1);
}
}
namespace {
class PrintRegionPass : public RegionPass {
private:
std::string Banner;
raw_ostream &Out;
public:
static char ID;
PrintRegionPass() : RegionPass(ID), Out(dbgs()) {}
PrintRegionPass(const std::string &B, raw_ostream &o)
: RegionPass(ID), Banner(B), Out(o) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
Out << Banner;
for (Region::block_iterator I = R->block_begin(), E = R->block_end();
I != E; ++I)
(*I)->print(Out);
return false;
}
};
char PrintRegionPass::ID = 0;
}
void RegionPass::preparePassManager(PMStack &PMS) {
while (!PMS.empty() &&
PMS.top()->getPassManagerType() > PMT_RegionPassManager)
PMS.pop();
if (PMS.top()->getPassManagerType() == PMT_RegionPassManager &&
!PMS.top()->preserveHigherLevelAnalysis(this))
PMS.pop();
}
void RegionPass::assignPassManager(PMStack &PMS,
PassManagerType PreferredType) {
while (!PMS.empty() &&
PMS.top()->getPassManagerType() > PMT_RegionPassManager)
PMS.pop();
RGPassManager *RGPM;
if (PMS.top()->getPassManagerType() == PMT_RegionPassManager)
RGPM = (RGPassManager*)PMS.top();
else {
assert (!PMS.empty() && "Unable to create Region Pass Manager");
PMDataManager *PMD = PMS.top();
RGPM = new RGPassManager();
RGPM->populateInheritedAnalysis(PMS);
PMTopLevelManager *TPM = PMD->getTopLevelManager();
TPM->addIndirectPassManager(RGPM);
TPM->schedulePass(RGPM);
PMS.push(RGPM);
}
RGPM->add(this);
}
Pass *RegionPass::createPrinterPass(raw_ostream &O,
const std::string &Banner) const {
return new PrintRegionPass(Banner, O);
}