Factor GC metadata table assembly generation out of Collector in preparation for splitting AsmPrinter into its own library.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54881 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/GCMetadata.cpp b/lib/CodeGen/GCMetadata.cpp
new file mode 100644
index 0000000..c02a73b
--- /dev/null
+++ b/lib/CodeGen/GCMetadata.cpp
@@ -0,0 +1,212 @@
+//===-- 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/GCMetadata.h"
+#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/CodeGen/GCs.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);
+ };
+
+}
+
+static 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();
+ NameMap.clear();
+
+ 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;
+}