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llvm-mirror/lib/CodeGen/GCMetadata.cpp
Owen Anderson 46990c17f7 Get rid of static constructors for pass registration. Instead, every pass exposes an initializeMyPassFunction(), which
must be called in the pass's constructor.  This function uses static dependency declarations to recursively initialize
the pass's dependencies.

Clients that only create passes through the createFooPass() APIs will require no changes.  Clients that want to use the
CommandLine options for passes will need to manually call the appropriate initialization functions in PassInitialization.h
before parsing commandline arguments.

I have tested this with all standard configurations of clang and llvm-gcc on Darwin.  It is possible that there are problems
with the static dependencies that will only be visible with non-standard options.  If you encounter any crash in pass
registration/creation, please send the testcase to me directly.

llvm-svn: 116820
2010-10-19 17:21:58 +00:00

214 lines
5.6 KiB
C++

//===-- GCMetadata.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 GCFunctionInfo class and GCModuleInfo pass.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/Pass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Function.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
class Printer : public FunctionPass {
static char ID;
raw_ostream &OS;
public:
explicit Printer(raw_ostream &OS) : FunctionPass(ID), OS(OS) {}
const char *getPassName() const;
void getAnalysisUsage(AnalysisUsage &AU) const;
bool runOnFunction(Function &F);
};
class 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);
};
}
INITIALIZE_PASS(GCModuleInfo, "collector-metadata",
"Create Garbage Collector Module Metadata", false, false)
// -----------------------------------------------------------------------------
GCFunctionInfo::GCFunctionInfo(const Function &F, GCStrategy &S)
: F(F), S(S), FrameSize(~0LL) {}
GCFunctionInfo::~GCFunctionInfo() {}
// -----------------------------------------------------------------------------
char GCModuleInfo::ID = 0;
GCModuleInfo::GCModuleInfo()
: ImmutablePass(ID) {
initializeGCModuleInfoPass(*PassRegistry::getPassRegistry());
}
GCModuleInfo::~GCModuleInfo() {
clear();
}
GCStrategy *GCModuleInfo::getOrCreateStrategy(const Module *M,
const std::string &Name) {
strategy_map_type::iterator NMI = StrategyMap.find(Name);
if (NMI != StrategyMap.end())
return NMI->getValue();
for (GCRegistry::iterator I = GCRegistry::begin(),
E = GCRegistry::end(); I != E; ++I) {
if (Name == I->getName()) {
GCStrategy *S = I->instantiate();
S->M = M;
S->Name = Name;
StrategyMap.GetOrCreateValue(Name).setValue(S);
StrategyList.push_back(S);
return S;
}
}
dbgs() << "unsupported GC: " << Name << "\n";
llvm_unreachable(0);
}
GCFunctionInfo &GCModuleInfo::getFunctionInfo(const Function &F) {
assert(!F.isDeclaration() && "Can only get GCFunctionInfo for a definition!");
assert(F.hasGC());
finfo_map_type::iterator I = FInfoMap.find(&F);
if (I != FInfoMap.end())
return *I->second;
GCStrategy *S = getOrCreateStrategy(F.getParent(), F.getGC());
GCFunctionInfo *GFI = S->insertFunctionInfo(F);
FInfoMap[&F] = GFI;
return *GFI;
}
void GCModuleInfo::clear() {
FInfoMap.clear();
StrategyMap.clear();
for (iterator I = begin(), E = end(); I != E; ++I)
delete *I;
StrategyList.clear();
}
// -----------------------------------------------------------------------------
char Printer::ID = 0;
FunctionPass *llvm::createGCInfoPrinter(raw_ostream &OS) {
return new Printer(OS);
}
const char *Printer::getPassName() const {
return "Print Garbage Collector Information";
}
void Printer::getAnalysisUsage(AnalysisUsage &AU) const {
FunctionPass::getAnalysisUsage(AU);
AU.setPreservesAll();
AU.addRequired<GCModuleInfo>();
}
static const char *DescKind(GC::PointKind Kind) {
switch (Kind) {
default: llvm_unreachable("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.hasGC()) return false;
GCFunctionInfo *FD = &getAnalysis<GCModuleInfo>().getFunctionInfo(F);
OS << "GC roots for " << FD->getFunction().getNameStr() << ":\n";
for (GCFunctionInfo::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().getNameStr() << ":\n";
for (GCFunctionInfo::iterator PI = FD->begin(),
PE = FD->end(); PI != PE; ++PI) {
OS << "\t" << PI->Label->getName() << ": "
<< DescKind(PI->Kind) << ", live = {";
for (GCFunctionInfo::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::createGCInfoDeleter() {
return new Deleter();
}
Deleter::Deleter() : FunctionPass(ID) {}
const char *Deleter::getPassName() const {
return "Delete Garbage Collector Information";
}
void Deleter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequired<GCModuleInfo>();
}
bool Deleter::runOnFunction(Function &MF) {
return false;
}
bool Deleter::doFinalization(Module &M) {
GCModuleInfo *GMI = getAnalysisIfAvailable<GCModuleInfo>();
assert(GMI && "Deleter didn't require GCModuleInfo?!");
GMI->clear();
return false;
}