--- /dev/null
+//===-- llvm/CodeGen/Collector.h - Garbage collection -----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Collector records sufficient information about a machine function to enable
+// accurate garbage collectors. Specifically:
+//
+// - Safe points
+// Garbage collection is only possible at certain points in code. Code
+// generators should record points:
+//
+// - At and after any call to a subroutine
+// - Before returning from the current function
+// - Before backwards branches (loops)
+//
+// - Roots
+// When a reference to a GC-allocated object exists on the stack, it must be
+// stored in an alloca registered with llvm.gcoot.
+//
+// This generic information should used by ABI-specific passes to emit support
+// tables for the runtime garbage collector.
+//
+// MachineCodeAnalysis identifies the GC safe points in the machine code. (Roots
+// are identified in SelectionDAGISel.)
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_COLLECTOR_H
+#define LLVM_CODEGEN_COLLECTOR_H
+
+#include "llvm/CodeGen/GCMetadata.h"
+#include <iosfwd>
+#include <string>
+
+namespace llvm {
+
+ /// Collector describes a garbage collector's code generation requirements,
+ /// and provides overridable hooks for those needs which cannot be abstractly
+ /// described.
+ class Collector {
+ public:
+ typedef std::vector<CollectorMetadata*> list_type;
+ typedef list_type::iterator iterator;
+
+ private:
+ friend class CollectorModuleMetadata;
+ const Module *M;
+ std::string Name;
+
+ list_type Functions;
+
+ protected:
+ unsigned NeededSafePoints; //< Bitmask of required safe points.
+ bool CustomReadBarriers; //< Default is to insert loads.
+ bool CustomWriteBarriers; //< Default is to insert stores.
+ bool CustomRoots; //< Default is to pass through to backend.
+ bool InitRoots; //< If set, roots are nulled during lowering.
+ bool UsesMetadata; //< If set, backend must emit metadata tables.
+
+ public:
+ Collector();
+
+ virtual ~Collector();
+
+
+ /// getName - The name of the collector, for debugging.
+ ///
+ const std::string &getName() const { return Name; }
+
+ /// getModule - The module upon which the collector is operating.
+ ///
+ const Module &getModule() const { return *M; }
+
+ /// True if this collector requires safe points of any kind. By default,
+ /// none are recorded.
+ bool needsSafePoints() const { return NeededSafePoints != 0; }
+
+ /// True if the collector requires the given kind of safe point. By default,
+ /// none are recorded.
+ bool needsSafePoint(GC::PointKind Kind) const {
+ return (NeededSafePoints & 1 << Kind) != 0;
+ }
+
+ /// By default, write barriers are replaced with simple store instructions.
+ /// If true, then addPassesToCustomLowerIntrinsics must instead process
+ /// them.
+ bool customWriteBarrier() const { return CustomWriteBarriers; }
+
+ /// By default, read barriers are replaced with simple load instructions.
+ /// If true, then addPassesToCustomLowerIntrinsics must instead process
+ /// them.
+ bool customReadBarrier() const { return CustomReadBarriers; }
+
+ /// By default, roots are left for the code generator. If Custom, then
+ /// addPassesToCustomLowerIntrinsics must add passes to delete them.
+ bool customRoots() const { return CustomRoots; }
+
+ /// If set, gcroot intrinsics should initialize their allocas to null. This
+ /// is necessary for most collectors.
+ bool initializeRoots() const { return InitRoots; }
+
+ /// If set, appropriate metadata tables must be emitted by the back-end
+ /// (assembler, JIT, or otherwise).
+ bool usesMetadata() const { return UsesMetadata; }
+
+ /// begin/end - Iterators for function metadata.
+ ///
+ iterator begin() { return Functions.begin(); }
+ iterator end() { return Functions.end(); }
+
+ /// insertFunctionMetadata - Creates metadata for a function.
+ ///
+ CollectorMetadata *insertFunctionMetadata(const Function &F);
+
+ /// initializeCustomLowering/performCustomLowering - If any of the actions
+ /// are set to custom, performCustomLowering must be overriden to create a
+ /// transform to lower those actions to LLVM IR. initializeCustomLowering
+ /// is optional to override. These are the only Collector methods through
+ /// which the LLVM IR can be modified.
+ virtual bool initializeCustomLowering(Module &F);
+ virtual bool performCustomLowering(Function &F);
+ };
+
+ // GCMetadataPrinter - Emits GC metadata as assembly code.
+ class GCMetadataPrinter {
+ public:
+ typedef Collector::list_type list_type;
+ typedef Collector::iterator iterator;
+
+ private:
+ Collector *Coll;
+
+ friend class AsmPrinter;
+
+ protected:
+ // May only be subclassed.
+ GCMetadataPrinter();
+
+ // Do not implement.
+ GCMetadataPrinter(const GCMetadataPrinter &);
+ GCMetadataPrinter &operator=(const GCMetadataPrinter &);
+
+ public:
+ Collector &getCollector() { return *Coll; }
+ const Module &getModule() const { return Coll->getModule(); }
+
+ iterator begin() { return Coll->begin(); }
+ iterator end() { return Coll->end(); }
+
+ /// beginAssembly/finishAssembly - Emit module metadata as assembly code.
+ virtual void beginAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+
+ virtual void finishAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI);
+
+ virtual ~GCMetadataPrinter();
+ };
+
+}
+
+#endif
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_COLLECTORS_H
-#define LLVM_CODEGEN_COLLECTORS_H
+#ifndef LLVM_CODEGEN_GCS_H
+#define LLVM_CODEGEN_GCS_H
#include "llvm/Support/Registry.h"
/// Creates an ocaml-compatible garbage collector.
Collector *createOcamlCollector();
+ /// Creates an ocaml-compatible metadata printer.
+ GCMetadataPrinter *createOcamlMetadataPrinter();
+
/// Creates a shadow stack garbage collector. This collector requires no code
/// generator support.
Collector *createShadowStackCollector();
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/ScheduleDAG.h"
-#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/GCs.h"
namespace {
struct ForceCodegenLinking {
(void) llvm::createSimpleRegisterCoalescer();
(void) llvm::createOcamlCollector();
+ (void) llvm::createOcamlMetadataPrinter();
(void) llvm::createShadowStackCollector();
(void) llvm::createBURRListDAGScheduler(NULL, NULL, NULL, false);
#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
-#include "llvm/CodeGen/Collector.h"
-#include "llvm/CodeGen/CollectorMetadata.h"
-#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/CodeGen/GCMetadata.h"
+#include "llvm/CodeGen/GCs.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/CollectorMetadata.h"
-#include "llvm/CodeGen/Collector.h"
-#include "llvm/CodeGen/Collectors.h"
+#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"
--- /dev/null
+//===-- Collector.cpp - Garbage collection infrastructure -----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements target- and collector-independent garbage collection
+// infrastructure.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GCStrategy.h"
+
+using namespace llvm;
+
+GCMetadataPrinter::GCMetadataPrinter() { }
+
+GCMetadataPrinter::~GCMetadataPrinter() { }
+
+void GCMetadataPrinter::beginAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ // Default is no action.
+}
+
+void GCMetadataPrinter::finishAssembly(std::ostream &OS, AsmPrinter &AP,
+ const TargetAsmInfo &TAI) {
+ // Default is no action.
+}
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/Collector.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
// -----------------------------------------------------------------------------
-GCMetadataPrinter::GCMetadataPrinter() { }
-
-GCMetadataPrinter::~GCMetadataPrinter() { }
-
-void GCMetadataPrinter::beginAssembly(std::ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI) {
- // Default is no action.
-}
-
-void GCMetadataPrinter::finishAssembly(std::ostream &OS, AsmPrinter &AP,
- const TargetAsmInfo &TAI) {
- // Default is no action.
-}
-
-// -----------------------------------------------------------------------------
-
FunctionPass *llvm::createGCLoweringPass() {
return new LowerIntrinsics();
}
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/GCs.h"
using namespace llvm;
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/Collector.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Transforms/Scalar.h"
--- /dev/null
+//===-- OcamlCollector.cpp - Ocaml frametable emitter ---------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements lowering for the llvm.gc* intrinsics compatible with
+// Objective Caml 3.10.0, which uses a liveness-accurate static stack map.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GCs.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/Module.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+
+using namespace llvm;
+
+namespace {
+
+ class VISIBILITY_HIDDEN OcamlCollector : public Collector {
+ public:
+ OcamlCollector();
+ };
+
+}
+
+static CollectorRegistry::Add<OcamlCollector>
+X("ocaml", "ocaml 3.10-compatible collector");
+
+// -----------------------------------------------------------------------------
+
+Collector *llvm::createOcamlCollector() {
+ return new OcamlCollector();
+}
+
+OcamlCollector::OcamlCollector() {
+ NeededSafePoints = 1 << GC::PostCall;
+ UsesMetadata = true;
+}
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/GCs.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/Collector.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/Module.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
namespace {
- class VISIBILITY_HIDDEN OcamlCollector : public Collector {
- public:
- OcamlCollector();
- };
-
class VISIBILITY_HIDDEN OcamlGCMetadataPrinter : public GCMetadataPrinter {
public:
void beginAssembly(std::ostream &OS, AsmPrinter &AP,
}
-static CollectorRegistry::Add<OcamlCollector>
-X("ocaml", "ocaml 3.10-compatible collector");
-
static GCMetadataPrinterRegistry::Add<OcamlGCMetadataPrinter>
Y("ocaml", "ocaml 3.10-compatible collector");
-// -----------------------------------------------------------------------------
+GCMetadataPrinter *llvm::createOcamlMetadataPrinter() {
+ return new OcamlGCMetadataPrinter();
+}
static void EmitCamlGlobal(const Module &M, std::ostream &OS, AsmPrinter &AP,
const TargetAsmInfo &TAI, const char *Id) {
OS << Mangled << ":\n";
}
-Collector *llvm::createOcamlCollector() {
- return new OcamlCollector();
-}
-
-OcamlCollector::OcamlCollector() {
- NeededSafePoints = 1 << GC::PostCall;
- UsesMetadata = true;
-}
-
void OcamlGCMetadataPrinter::beginAssembly(std::ostream &OS, AsmPrinter &AP,
const TargetAsmInfo &TAI) {
AP.SwitchToTextSection(TAI.getTextSection());
#include "llvm/Intrinsics.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/ParameterAttributes.h"
-#include "llvm/CodeGen/Collector.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "shadowstackgc"
-#include "llvm/CodeGen/Collectors.h"
+#include "llvm/CodeGen/GCs.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/CodeGen/Collector.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Module.h"
#include "llvm/Support/IRBuilder.h"
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