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//===-- CollectorMetadata.cpp - Garbage collector metadata ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Gordon Henriksen and 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/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/Function.h"
#include "llvm/Support/Compiler.h"
using namespace llvm;
namespace {
class VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
static char ID;
std::ostream &OS;
public:
Printer(std::ostream &OS = *cerr);
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnMachineFunction(MachineFunction &MF);
};
class VISIBILITY_HIDDEN Deleter : public MachineFunctionPass {
static char ID;
public:
Deleter();
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnMachineFunction(MachineFunction &MF);
bool doFinalization(Module &M);
};
RegisterPass<CollectorModuleMetadata>
X("collector-metadata", "Create Garbage Collector Module Metadata");
}
// -----------------------------------------------------------------------------
CollectorMetadata::CollectorMetadata(const Function &F)
: F(F), FrameSize(~0LL) {}
CollectorMetadata::~CollectorMetadata() {}
// -----------------------------------------------------------------------------
char CollectorModuleMetadata::ID = 0;
CollectorModuleMetadata::CollectorModuleMetadata()
: ImmutablePass((intptr_t)&ID) {}
CollectorModuleMetadata::~CollectorModuleMetadata() {
clear();
}
CollectorMetadata& CollectorModuleMetadata::insert(const Function *F) {
assert(Map.find(F) == Map.end() && "Function GC metadata already exists!");
CollectorMetadata *FMD = new CollectorMetadata(*F);
Functions.push_back(FMD);
Map[F] = FMD;
return *FMD;
}
CollectorMetadata* CollectorModuleMetadata::get(const Function *F) const {
map_type::iterator I = Map.find(F);
if (I == Map.end())
return 0;
return I->second;
}
void CollectorModuleMetadata::clear() {
for (iterator I = begin(), E = end(); I != E; ++I)
delete *I;
Functions.clear();
Map.clear();
}
// -----------------------------------------------------------------------------
char Printer::ID = 0;
Pass *llvm::createCollectorMetadataPrinter(std::ostream &OS) {
return new Printer(OS);
}
Printer::Printer(std::ostream &OS)
: MachineFunctionPass(intptr_t(&ID)), OS(OS) {}
const char *Printer::getPassName() const {
return "Print Garbage Collector Information";
}
void Printer::getAnalysisUsage(AnalysisUsage &AU) const {
MachineFunctionPass::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::runOnMachineFunction(MachineFunction &MF) {
if (CollectorMetadata *FD =
getAnalysis<CollectorModuleMetadata>().get(MF.getFunction())) {
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;
Pass *llvm::createCollectorMetadataDeleter() {
return new Deleter();
}
Deleter::Deleter() : MachineFunctionPass(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::runOnMachineFunction(MachineFunction &MF) {
return false;
}
bool Deleter::doFinalization(Module &M) {
getAnalysis<CollectorModuleMetadata>().clear();
return false;
}
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