//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCMetadata.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Function.h"
-#include "llvm/IR/GCStrategy.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Pass.h"
#include "llvm/Support/Debug.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) {}
+class Printer : public FunctionPass {
+ static char ID;
+ raw_ostream &OS;
- const char *getPassName() const override;
- void getAnalysisUsage(AnalysisUsage &AU) const override;
+public:
+ explicit Printer(raw_ostream &OS) : FunctionPass(ID), OS(OS) {}
- bool runOnFunction(Function &F) override;
- bool doFinalization(Module &M) override;
- };
+ const char *getPassName() const override;
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
+ bool runOnFunction(Function &F) override;
+ bool doFinalization(Module &M) override;
+};
}
INITIALIZE_PASS(GCModuleInfo, "collector-metadata",
// -----------------------------------------------------------------------------
GCFunctionInfo::GCFunctionInfo(const Function &F, GCStrategy &S)
- : F(F), S(S), FrameSize(~0LL) {}
+ : F(F), S(S), FrameSize(~0LL) {}
GCFunctionInfo::~GCFunctionInfo() {}
char GCModuleInfo::ID = 0;
-GCModuleInfo::GCModuleInfo()
- : ImmutablePass(ID) {
+GCModuleInfo::GCModuleInfo() : ImmutablePass(ID) {
initializeGCModuleInfoPass(*PassRegistry::getPassRegistry());
}
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 = F.getGCStrategy();
- if (!S) {
- std::string error = std::string("unsupported GC: ") + F.getGC();
- report_fatal_error(error);
- }
- // Save the fact this strategy is associated with this module. Note that
- // these are non-owning references, the GCStrategy remains owned by the
- // Context.
- StrategyList.push_back(S);
+
+ GCStrategy *S = getGCStrategy(F.getGC());
Functions.push_back(make_unique<GCFunctionInfo>(F, *S));
GCFunctionInfo *GFI = Functions.back().get();
FInfoMap[&F] = GFI;
void GCModuleInfo::clear() {
Functions.clear();
FInfoMap.clear();
- StrategyList.clear();
+ GCStrategyList.clear();
}
// -----------------------------------------------------------------------------
return new Printer(OS);
}
-
const char *Printer::getPassName() const {
return "Print Garbage Collector Information";
}
static const char *DescKind(GC::PointKind Kind) {
switch (Kind) {
- case GC::Loop: return "loop";
- case GC::Return: return "return";
- case GC::PreCall: return "pre-call";
- case GC::PostCall: return "post-call";
+ case GC::PreCall:
+ return "pre-call";
+ case GC::PostCall:
+ return "post-call";
}
llvm_unreachable("Invalid point kind");
}
bool Printer::runOnFunction(Function &F) {
- if (F.hasGC()) return false;
-
+ if (F.hasGC())
+ return false;
+
GCFunctionInfo *FD = &getAnalysis<GCModuleInfo>().getFunctionInfo(F);
-
+
OS << "GC roots for " << FD->getFunction().getName() << ":\n";
for (GCFunctionInfo::roots_iterator RI = FD->roots_begin(),
- RE = FD->roots_end(); RI != RE; ++RI)
+ RE = FD->roots_end();
+ RI != RE; ++RI)
OS << "\t" << RI->Num << "\t" << RI->StackOffset << "[sp]\n";
-
+
OS << "GC safe points for " << FD->getFunction().getName() << ":\n";
- for (GCFunctionInfo::iterator PI = FD->begin(),
- PE = FD->end(); PI != PE; ++PI) {
-
- OS << "\t" << PI->Label->getName() << ": "
- << DescKind(PI->Kind) << ", live = {";
-
+ 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);;) {
+ RE = FD->live_end(PI);
+ ;) {
OS << " " << RI->Num;
if (++RI == RE)
break;
OS << ",";
}
-
+
OS << " }\n";
}
-
+
return false;
}
GMI->clear();
return false;
}
+
+GCStrategy *GCModuleInfo::getGCStrategy(const StringRef Name) {
+ // TODO: Arguably, just doing a linear search would be faster for small N
+ auto NMI = GCStrategyMap.find(Name);
+ if (NMI != GCStrategyMap.end())
+ return NMI->getValue();
+
+ for (auto& Entry : GCRegistry::entries()) {
+ if (Name == Entry.getName()) {
+ std::unique_ptr<GCStrategy> S = Entry.instantiate();
+ S->Name = Name;
+ GCStrategyMap[Name] = S.get();
+ GCStrategyList.push_back(std::move(S));
+ return GCStrategyList.back().get();
+ }
+ }
+
+ if (GCRegistry::begin() == GCRegistry::end()) {
+ // In normal operation, the registry should not be empty. There should
+ // be the builtin GCs if nothing else. The most likely scenario here is
+ // that we got here without running the initializers used by the Registry
+ // itself and it's registration mechanism.
+ const std::string error = ("unsupported GC: " + Name).str() +
+ " (did you remember to link and initialize the CodeGen library?)";
+ report_fatal_error(error);
+ } else
+ report_fatal_error(std::string("unsupported GC: ") + Name);
+}
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