llvm-6502/lib/CodeGen/CollectorMetadata.cpp

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//===-- CollectorMetadata.cpp - Garbage collector metadata ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the CollectorMetadata and CollectorModuleMetadata
// classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/CollectorMetadata.h"
#include "llvm/CodeGen/Collector.h"
#include "llvm/CodeGen/Collectors.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Pass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Function.h"
#include "llvm/Support/Compiler.h"
using namespace llvm;
namespace {
class VISIBILITY_HIDDEN Printer : public FunctionPass {
static char ID;
std::ostream &OS;
public:
explicit Printer(std::ostream &OS = *cerr);
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnFunction(Function &F);
};
class VISIBILITY_HIDDEN Deleter : public FunctionPass {
static char ID;
public:
Deleter();
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnFunction(Function &F);
bool doFinalization(Module &M);
};
RegisterPass<CollectorModuleMetadata>
X("collector-metadata", "Create Garbage Collector Module Metadata");
}
// -----------------------------------------------------------------------------
CollectorMetadata::CollectorMetadata(const Function &F, Collector &C)
: F(F), C(C), FrameSize(~0LL) {}
CollectorMetadata::~CollectorMetadata() {}
// -----------------------------------------------------------------------------
char CollectorModuleMetadata::ID = 0;
CollectorModuleMetadata::CollectorModuleMetadata()
: ImmutablePass((intptr_t)&ID) {}
CollectorModuleMetadata::~CollectorModuleMetadata() {
clear();
}
Collector *CollectorModuleMetadata::
getOrCreateCollector(const Module *M, const std::string &Name) {
const char *Start = Name.c_str();
collector_map_type::iterator NMI = NameMap.find(Start, Start + Name.size());
if (NMI != NameMap.end())
return NMI->getValue();
for (CollectorRegistry::iterator I = CollectorRegistry::begin(),
E = CollectorRegistry::end(); I != E; ++I) {
if (strcmp(Start, I->getName()) == 0) {
Collector *C = I->instantiate();
C->M = M;
C->Name = Name;
NameMap.GetOrCreateValue(Start, Start + Name.size()).setValue(C);
Collectors.push_back(C);
return C;
}
}
cerr << "unsupported collector: " << Name << "\n";
abort();
}
CollectorMetadata &CollectorModuleMetadata::get(const Function &F) {
assert(F.hasCollector());
function_map_type::iterator I = Map.find(&F);
if (I != Map.end())
return *I->second;
Collector *C = getOrCreateCollector(F.getParent(), F.getCollector());
CollectorMetadata *MD = C->insertFunctionMetadata(F);
Map[&F] = MD;
return *MD;
}
void CollectorModuleMetadata::clear() {
Map.clear();
// TODO: StringMap should provide a clear method.
while (!NameMap.empty())
NameMap.erase(NameMap.begin());
for (iterator I = begin(), E = end(); I != E; ++I)
delete *I;
Collectors.clear();
}
// -----------------------------------------------------------------------------
char Printer::ID = 0;
FunctionPass *llvm::createCollectorMetadataPrinter(std::ostream &OS) {
return new Printer(OS);
}
Printer::Printer(std::ostream &OS)
: FunctionPass(intptr_t(&ID)), OS(OS) {}
const char *Printer::getPassName() const {
return "Print Garbage Collector Information";
}
void Printer::getAnalysisUsage(AnalysisUsage &AU) const {
FunctionPass::getAnalysisUsage(AU);
AU.setPreservesAll();
AU.addRequired<CollectorModuleMetadata>();
}
static const char *DescKind(GC::PointKind Kind) {
switch (Kind) {
default: assert(0 && "Unknown GC point kind");
case GC::Loop: return "loop";
case GC::Return: return "return";
case GC::PreCall: return "pre-call";
case GC::PostCall: return "post-call";
}
}
bool Printer::runOnFunction(Function &F) {
if (F.hasCollector()) {
CollectorMetadata *FD = &getAnalysis<CollectorModuleMetadata>().get(F);
OS << "GC roots for " << FD->getFunction().getNameStart() << ":\n";
for (CollectorMetadata::roots_iterator RI = FD->roots_begin(),
RE = FD->roots_end();
RI != RE; ++RI)
OS << "\t" << RI->Num << "\t" << RI->StackOffset << "[sp]\n";
OS << "GC safe points for " << FD->getFunction().getNameStart() << ":\n";
for (CollectorMetadata::iterator PI = FD->begin(),
PE = FD->end(); PI != PE; ++PI) {
OS << "\tlabel " << PI->Num << ": " << DescKind(PI->Kind) << ", live = {";
for (CollectorMetadata::live_iterator RI = FD->live_begin(PI),
RE = FD->live_end(PI);;) {
OS << " " << RI->Num;
if (++RI == RE)
break;
OS << ",";
}
OS << " }\n";
}
}
return false;
}
// -----------------------------------------------------------------------------
char Deleter::ID = 0;
FunctionPass *llvm::createCollectorMetadataDeleter() {
return new Deleter();
}
Deleter::Deleter() : FunctionPass(intptr_t(&ID)) {}
const char *Deleter::getPassName() const {
return "Delete Garbage Collector Information";
}
void Deleter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<CollectorModuleMetadata>();
}
bool Deleter::runOnFunction(Function &MF) {
return false;
}
bool Deleter::doFinalization(Module &M) {
CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
assert(CMM && "Deleter didn't require CollectorModuleMetadata?!");
CMM->clear();
return false;
}