mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-26 23:29:22 +00:00
Looking into 23095, my best guess is that the CodeGen library itself isn't getting linked and initialized properly. To make this slightly more obvious to consumers of LLVM, emit a different error message if we can tell that the registry is empty vs you've simply happened to name a collector which hasn't been registered. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235824 91177308-0d34-0410-b5e6-96231b3b80d8
178 lines
5.2 KiB
C++
178 lines
5.2 KiB
C++
//===-- GCMetadata.cpp - Garbage collector metadata -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the GCFunctionInfo class and GCModuleInfo pass.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/GCMetadata.h"
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#include "llvm/CodeGen/GCStrategy.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/IR/Function.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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class Printer : public FunctionPass {
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static char ID;
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raw_ostream &OS;
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public:
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explicit Printer(raw_ostream &OS) : FunctionPass(ID), OS(OS) {}
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const char *getPassName() const override;
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void getAnalysisUsage(AnalysisUsage &AU) const override;
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bool runOnFunction(Function &F) override;
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bool doFinalization(Module &M) override;
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};
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}
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INITIALIZE_PASS(GCModuleInfo, "collector-metadata",
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"Create Garbage Collector Module Metadata", false, false)
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// -----------------------------------------------------------------------------
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GCFunctionInfo::GCFunctionInfo(const Function &F, GCStrategy &S)
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: F(F), S(S), FrameSize(~0LL) {}
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GCFunctionInfo::~GCFunctionInfo() {}
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// -----------------------------------------------------------------------------
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char GCModuleInfo::ID = 0;
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GCModuleInfo::GCModuleInfo() : ImmutablePass(ID) {
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initializeGCModuleInfoPass(*PassRegistry::getPassRegistry());
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}
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GCFunctionInfo &GCModuleInfo::getFunctionInfo(const Function &F) {
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assert(!F.isDeclaration() && "Can only get GCFunctionInfo for a definition!");
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assert(F.hasGC());
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finfo_map_type::iterator I = FInfoMap.find(&F);
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if (I != FInfoMap.end())
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return *I->second;
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GCStrategy *S = getGCStrategy(F.getGC());
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Functions.push_back(make_unique<GCFunctionInfo>(F, *S));
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GCFunctionInfo *GFI = Functions.back().get();
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FInfoMap[&F] = GFI;
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return *GFI;
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}
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void GCModuleInfo::clear() {
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Functions.clear();
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FInfoMap.clear();
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GCStrategyList.clear();
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}
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// -----------------------------------------------------------------------------
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char Printer::ID = 0;
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FunctionPass *llvm::createGCInfoPrinter(raw_ostream &OS) {
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return new Printer(OS);
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}
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const char *Printer::getPassName() const {
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return "Print Garbage Collector Information";
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}
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void Printer::getAnalysisUsage(AnalysisUsage &AU) const {
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FunctionPass::getAnalysisUsage(AU);
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AU.setPreservesAll();
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AU.addRequired<GCModuleInfo>();
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}
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static const char *DescKind(GC::PointKind Kind) {
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switch (Kind) {
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case GC::PreCall:
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return "pre-call";
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case GC::PostCall:
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return "post-call";
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}
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llvm_unreachable("Invalid point kind");
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}
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bool Printer::runOnFunction(Function &F) {
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if (F.hasGC())
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return false;
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GCFunctionInfo *FD = &getAnalysis<GCModuleInfo>().getFunctionInfo(F);
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OS << "GC roots for " << FD->getFunction().getName() << ":\n";
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for (GCFunctionInfo::roots_iterator RI = FD->roots_begin(),
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RE = FD->roots_end();
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RI != RE; ++RI)
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OS << "\t" << RI->Num << "\t" << RI->StackOffset << "[sp]\n";
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OS << "GC safe points for " << FD->getFunction().getName() << ":\n";
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for (GCFunctionInfo::iterator PI = FD->begin(), PE = FD->end(); PI != PE;
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++PI) {
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OS << "\t" << PI->Label->getName() << ": " << DescKind(PI->Kind)
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<< ", live = {";
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for (GCFunctionInfo::live_iterator RI = FD->live_begin(PI),
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RE = FD->live_end(PI);
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;) {
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OS << " " << RI->Num;
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if (++RI == RE)
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break;
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OS << ",";
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}
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OS << " }\n";
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}
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return false;
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}
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bool Printer::doFinalization(Module &M) {
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GCModuleInfo *GMI = getAnalysisIfAvailable<GCModuleInfo>();
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assert(GMI && "Printer didn't require GCModuleInfo?!");
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GMI->clear();
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return false;
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}
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GCStrategy *GCModuleInfo::getGCStrategy(const StringRef Name) {
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// TODO: Arguably, just doing a linear search would be faster for small N
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auto NMI = GCStrategyMap.find(Name);
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if (NMI != GCStrategyMap.end())
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return NMI->getValue();
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for (auto& Entry : GCRegistry::entries()) {
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if (Name == Entry.getName()) {
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std::unique_ptr<GCStrategy> S = Entry.instantiate();
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S->Name = Name;
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GCStrategyMap[Name] = S.get();
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GCStrategyList.push_back(std::move(S));
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return GCStrategyList.back().get();
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}
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}
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if (GCRegistry::begin() == GCRegistry::end()) {
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// In normal operation, the registry should not be empty. There should
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// be the builtin GCs if nothing else. The most likely scenario here is
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// that we got here without running the initializers used by the Registry
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// itself and it's registration mechanism.
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const std::string error = ("unsupported GC: " + Name).str() +
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" (did you remember to link and initialize the CodeGen library?)";
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report_fatal_error(error);
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} else
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report_fatal_error(std::string("unsupported GC: ") + Name);
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}
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