#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/IR/DebugLoc.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/Pass.h"
#include <memory>
namespace llvm {
class AsmPrinter;
- class GCStrategy;
class Constant;
class MCSymbol;
- namespace GC {
- /// PointKind - The type of a collector-safe point.
- ///
- enum PointKind {
- Loop, ///< Instr is a loop (backwards branch).
- Return, ///< Instr is a return instruction.
- PreCall, ///< Instr is a call instruction.
- PostCall ///< Instr is the return address of a call.
- };
- }
-
/// GCPoint - Metadata for a collector-safe point in machine code.
///
struct GCPoint {
/// Records both the function level information used by GCRoots and a
/// cache of the 'active' gc strategy objects for the current Module.
class GCModuleInfo : public ImmutablePass {
- typedef StringMap<GCStrategy*> strategy_map_type;
- typedef std::vector<std::unique_ptr<GCStrategy>> list_type;
-
- strategy_map_type StrategyMap;
- list_type StrategyList;
-
- GCStrategy *getOrCreateStrategy(const Module *M, const std::string &Name);
-
+ /// A list of GCStrategies which are active in this Module. These are
+ /// not owning pointers.
+ std::vector<GCStrategy*> StrategyList;
public:
/// List of per function info objects. In theory, Each of these
/// may be associated with a different GC.
finfo_map_type FInfoMap;
public:
- typedef list_type::const_iterator iterator;
+ typedef std::vector<GCStrategy*>::const_iterator iterator;
static char ID;
#define LLVM_CODEGEN_GCMETADATAPRINTER_H
#include "llvm/CodeGen/GCMetadata.h"
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/Support/Registry.h"
namespace llvm {
+++ /dev/null
-//===-- llvm/CodeGen/GCStrategy.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.
-//
-//===----------------------------------------------------------------------===//
-//
-// GCStrategy coordinates code generation algorithms and implements some itself
-// in order to generate code compatible with a target code generator as
-// specified in a function's 'gc' attribute. Algorithms are enabled by setting
-// flags in a subclass's constructor, and some virtual methods can be
-// overridden.
-//
-// GCStrategy is relevant for implementations using either gc.root or
-// gc.statepoint based lowering strategies, but is currently focused mostly on
-// options for gc.root. This will change over time.
-//
-// When requested by a subclass of GCStrategy, the gc.root implementation will
-// populate GCModuleInfo and GCFunctionInfo with that about each Function in
-// the Module that opts in to garbage collection. Specifically:
-//
-// - Safe points
-// Garbage collection is generally only possible at certain points in code.
-// GCStrategy can request that the collector insert such 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 information can used to emit the metadata tables which are required by
-// the target garbage collector runtime.
-//
-// When used with gc.statepoint, information about safepoint and roots can be
-// found in the binary StackMap section after code generation. Safepoint
-// placement is currently the responsibility of the frontend, though late
-// insertion support is planned. gc.statepoint does not currently support
-// custom stack map formats; such can be generated by parsing the standard
-// stack map section if desired.
-//
-// The read and write barrier support can be used with either implementation.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CODEGEN_GCSTRATEGY_H
-#define LLVM_CODEGEN_GCSTRATEGY_H
-
-#include "llvm/ADT/Optional.h"
-#include "llvm/CodeGen/GCMetadata.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/Support/Registry.h"
-#include <string>
-
-namespace llvm {
- /// GCStrategy describes a garbage collector algorithm's code generation
- /// requirements, and provides overridable hooks for those needs which cannot
- /// be abstractly described. GCStrategy objects currently must be looked up
- /// through the GCModuleInfo analysis pass. They are owned by the analysis
- /// pass and recreated every time that pass is invalidated.
- class GCStrategy {
- private:
- std::string Name;
- friend class GCModuleInfo;
-
- protected:
- bool UseStatepoints; /// Uses gc.statepoints as opposed to gc.roots,
- /// if set, none of the other options can be
- /// anything but their default values.
-
- 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:
- GCStrategy();
- virtual ~GCStrategy() {}
-
- /// Return the name of the GC strategy. This is the value of the collector
- /// name string specified on functions which use this strategy.
- const std::string &getName() const { return Name; }
-
- /// By default, write barriers are replaced with simple store
- /// instructions. If true, then performCustomLowering must instead lower
- /// them.
- bool customWriteBarrier() const { return CustomWriteBarriers; }
-
- /// By default, read barriers are replaced with simple load
- /// instructions. If true, then performCustomLowering must instead lower
- /// them.
- bool customReadBarrier() const { return CustomReadBarriers; }
-
- /// Returns true if this strategy is expecting the use of gc.statepoints,
- /// and false otherwise.
- bool useStatepoints() const { return UseStatepoints; }
-
- /** @name Statepoint Specific Properties */
- ///@{
-
- /// If the value specified can be reliably distinguished, returns true for
- /// pointers to GC managed locations and false for pointers to non-GC
- /// managed locations. Note a GCStrategy can always return 'None' (i.e. an
- /// empty optional indicating it can't reliably distinguish.
- virtual Optional<bool> isGCManagedPointer(const Value *V) const {
- return None;
- }
- ///@}
-
- /** @name GCRoot Specific Properties
- * These properties and overrides only apply to collector strategies using
- * GCRoot.
- */
- ///@{
-
- /// True if safe points of any kind are required. By default, none are
- /// recorded.
- bool needsSafePoints() const {
- return NeededSafePoints != 0;
- }
-
- /// True if the given kind of safe point is required. By default, none are
- /// recorded.
- bool needsSafePoint(GC::PointKind Kind) const {
- return (NeededSafePoints & 1 << Kind) != 0;
- }
-
- /// By default, roots are left for the code generator so it can generate a
- /// stack map. If true, then performCustomLowering must delete them.
- bool customRoots() const { return CustomRoots; }
-
- /// If set, gcroot intrinsics should initialize their allocas to null
- /// before the first use. This is necessary for most GCs and is enabled by
- /// default.
- bool initializeRoots() const { return InitRoots; }
-
- /// If set, appropriate metadata tables must be emitted by the back-end
- /// (assembler, JIT, or otherwise). For statepoint, this method is
- /// currently unsupported. The stackmap information can be found in the
- /// StackMap section as described in the documentation.
- bool usesMetadata() const { return UsesMetadata; }
-
- ///@}
-
- /// initializeCustomLowering/performCustomLowering - If any of the actions
- /// are set to custom, performCustomLowering must be overriden to transform
- /// the corresponding actions to LLVM IR. initializeCustomLowering is
- /// optional to override. These are the only GCStrategy methods through
- /// which the LLVM IR can be modified. These methods apply mostly to
- /// gc.root based implementations, but can be overriden to provide custom
- /// barrier lowerings with gc.statepoint as well.
- ///@{
- virtual bool initializeCustomLowering(Module &F) {
- // No changes made
- return false;
- }
- virtual bool performCustomLowering(Function &F) {
- llvm_unreachable("GCStrategy subclass specified a configuration which"
- "requires a custom lowering without providing one");
- }
- };
-
- /// Subclasses of GCStrategy are made available for use during compilation by
- /// adding them to the global GCRegistry. This can done either within the
- /// LLVM source tree or via a loadable plugin. An example registeration
- /// would be:
- /// static GCRegistry::Add<CustomGC> X("custom-name",
- /// "my custom supper fancy gc strategy");
- ///
- /// Note that to use a custom GCMetadataPrinter w/gc.roots, you must also
- /// register your GCMetadataPrinter subclass with the
- /// GCMetadataPrinterRegistery as well.
- typedef Registry<GCStrategy> GCRegistry;
-}
-
-#endif
namespace llvm {
class FunctionType;
+class GCStrategy;
class LLVMContext;
// Traits for intrusive list of basic blocks...
void setGC(const char *Str);
void clearGC();
+ /// Returns the GCStrategy associated with the specified garbage collector
+ /// algorithm or nullptr if one is not set.
+ GCStrategy *getGCStrategy() const;
+
/// @brief adds the attribute to the list of attributes.
void addAttribute(unsigned i, Attribute::AttrKind attr);
--- /dev/null
+//===-- llvm/IR/GCStrategy.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.
+//
+//===----------------------------------------------------------------------===//
+//
+// GCStrategy coordinates code generation algorithms and implements some itself
+// in order to generate code compatible with a target code generator as
+// specified in a function's 'gc' attribute. Algorithms are enabled by setting
+// flags in a subclass's constructor, and some virtual methods can be
+// overridden.
+//
+// GCStrategy is relevant for implementations using either gc.root or
+// gc.statepoint based lowering strategies, but is currently focused mostly on
+// options for gc.root. This will change over time.
+//
+// When requested by a subclass of GCStrategy, the gc.root implementation will
+// populate GCModuleInfo and GCFunctionInfo with that about each Function in
+// the Module that opts in to garbage collection. Specifically:
+//
+// - Safe points
+// Garbage collection is generally only possible at certain points in code.
+// GCStrategy can request that the collector insert such 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 information can used to emit the metadata tables which are required by
+// the target garbage collector runtime.
+//
+// When used with gc.statepoint, information about safepoint and roots can be
+// found in the binary StackMap section after code generation. Safepoint
+// placement is currently the responsibility of the frontend, though late
+// insertion support is planned. gc.statepoint does not currently support
+// custom stack map formats; such can be generated by parsing the standard
+// stack map section if desired.
+//
+// The read and write barrier support can be used with either implementation.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_GCSTRATEGY_H
+#define LLVM_IR_GCSTRATEGY_H
+
+#include "llvm/ADT/Optional.h"
+#include "llvm/IR/Value.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Registry.h"
+#include <string>
+
+namespace llvm {
+ namespace GC {
+ /// PointKind - The type of a collector-safe point.
+ ///
+ enum PointKind {
+ Loop, ///< Instr is a loop (backwards branch).
+ Return, ///< Instr is a return instruction.
+ PreCall, ///< Instr is a call instruction.
+ PostCall ///< Instr is the return address of a call.
+ };
+ }
+
+
+ /// GCStrategy describes a garbage collector algorithm's code generation
+ /// requirements, and provides overridable hooks for those needs which cannot
+ /// be abstractly described. GCStrategy objects must be looked up through
+ /// the Function. The objects themselves are owned by the Context and must
+ /// be immutable.
+ class GCStrategy {
+ private:
+ std::string Name;
+ friend class LLVMContextImpl;
+
+ protected:
+ bool UseStatepoints; /// Uses gc.statepoints as opposed to gc.roots,
+ /// if set, none of the other options can be
+ /// anything but their default values.
+
+ 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:
+ GCStrategy();
+ virtual ~GCStrategy() {}
+
+ /// Return the name of the GC strategy. This is the value of the collector
+ /// name string specified on functions which use this strategy.
+ const std::string &getName() const { return Name; }
+
+ /// By default, write barriers are replaced with simple store
+ /// instructions. If true, then performCustomLowering must instead lower
+ /// them.
+ bool customWriteBarrier() const { return CustomWriteBarriers; }
+
+ /// By default, read barriers are replaced with simple load
+ /// instructions. If true, then performCustomLowering must instead lower
+ /// them.
+ bool customReadBarrier() const { return CustomReadBarriers; }
+
+ /// Returns true if this strategy is expecting the use of gc.statepoints,
+ /// and false otherwise.
+ bool useStatepoints() const { return UseStatepoints; }
+
+ /** @name Statepoint Specific Properties */
+ ///@{
+
+ /// If the value specified can be reliably distinguished, returns true for
+ /// pointers to GC managed locations and false for pointers to non-GC
+ /// managed locations. Note a GCStrategy can always return 'None' (i.e. an
+ /// empty optional indicating it can't reliably distinguish.
+ virtual Optional<bool> isGCManagedPointer(const Value *V) const {
+ return None;
+ }
+ ///@}
+
+ /** @name GCRoot Specific Properties
+ * These properties and overrides only apply to collector strategies using
+ * GCRoot.
+ */
+ ///@{
+
+ /// True if safe points of any kind are required. By default, none are
+ /// recorded.
+ bool needsSafePoints() const {
+ return NeededSafePoints != 0;
+ }
+
+ /// True if the given kind of safe point is required. By default, none are
+ /// recorded.
+ bool needsSafePoint(GC::PointKind Kind) const {
+ return (NeededSafePoints & 1 << Kind) != 0;
+ }
+
+ /// By default, roots are left for the code generator so it can generate a
+ /// stack map. If true, then performCustomLowering must delete them.
+ bool customRoots() const { return CustomRoots; }
+
+ /// If set, gcroot intrinsics should initialize their allocas to null
+ /// before the first use. This is necessary for most GCs and is enabled by
+ /// default.
+ bool initializeRoots() const { return InitRoots; }
+
+ /// If set, appropriate metadata tables must be emitted by the back-end
+ /// (assembler, JIT, or otherwise). For statepoint, this method is
+ /// currently unsupported. The stackmap information can be found in the
+ /// StackMap section as described in the documentation.
+ bool usesMetadata() const { return UsesMetadata; }
+
+ ///@}
+
+ /// initializeCustomLowering/performCustomLowering - If any of the actions
+ /// are set to custom, performCustomLowering must be overriden to transform
+ /// the corresponding actions to LLVM IR. initializeCustomLowering is
+ /// optional to override. These are the only GCStrategy methods through
+ /// which the LLVM IR can be modified. These methods apply mostly to
+ /// gc.root based implementations, but can be overriden to provide custom
+ /// barrier lowerings with gc.statepoint as well.
+ ///@{
+ virtual bool initializeCustomLowering(Module &F) {
+ // No changes made
+ return false;
+ }
+ virtual bool performCustomLowering(Function &F) {
+ llvm_unreachable("GCStrategy subclass specified a configuration which"
+ "requires a custom lowering without providing one");
+ }
+ };
+
+ /// Subclasses of GCStrategy are made available for use during compilation by
+ /// adding them to the global GCRegistry. This can done either within the
+ /// LLVM source tree or via a loadable plugin. An example registeration
+ /// would be:
+ /// static GCRegistry::Add<CustomGC> X("custom-name",
+ /// "my custom supper fancy gc strategy");
+ ///
+ /// Note that to use a custom GCMetadataPrinter w/gc.roots, you must also
+ /// register your GCMetadataPrinter subclass with the
+ /// GCMetadataPrinterRegistery as well.
+ typedef Registry<GCStrategy> GCRegistry;
+}
+
+#endif
static iterator begin() { return iterator(Head); }
static iterator end() { return iterator(nullptr); }
+ static iterator_range<iterator> entries() {
+ return iterator_range<iterator>(begin(), end());
+ }
+
/// Abstract base class for registry listeners, which are informed when new
/// entries are added to the registry. Simply subclass and instantiate:
GCMetadata.cpp
GCMetadataPrinter.cpp
GCRootLowering.cpp
- GCStrategy.cpp
GlobalMerge.cpp
IfConversion.cpp
InlineSpiller.cpp
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCs.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetInstrInfo.h"
//===----------------------------------------------------------------------===//
#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"
initializeGCModuleInfoPass(*PassRegistry::getPassRegistry());
}
-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()) {
- std::unique_ptr<GCStrategy> S = I->instantiate();
- S->Name = Name;
- StrategyMap[Name] = S.get();
- StrategyList.push_back(std::move(S));
- return StrategyList.back().get();
- }
- }
-
- dbgs() << "unsupported GC: " << Name << "\n";
- llvm_unreachable(nullptr);
-}
-
GCFunctionInfo &GCModuleInfo::getFunctionInfo(const Function &F) {
assert(!F.isDeclaration() && "Can only get GCFunctionInfo for a definition!");
assert(F.hasGC());
if (I != FInfoMap.end())
return *I->second;
- GCStrategy *S = getOrCreateStrategy(F.getParent(), F.getGC());
+ 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);
Functions.push_back(make_unique<GCFunctionInfo>(F, *S));
GCFunctionInfo *GFI = Functions.back().get();
FInfoMap[&F] = GFI;
void GCModuleInfo::clear() {
Functions.clear();
FInfoMap.clear();
- StrategyMap.clear();
StrategyList.clear();
}
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Dominators.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/Debug.h"
+++ /dev/null
-//===-- GCStrategy.cpp - Garbage Collector Description --------------------===//
-//
-// 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 policy object GCStrategy which describes the
-// behavior of a given garbage collector.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/GCStrategy.h"
-
-using namespace llvm;
-
-GCStrategy::GCStrategy()
- : UseStatepoints(false), NeededSafePoints(0), CustomReadBarriers(false),
- CustomWriteBarriers(false), CustomRoots(false),
- InitRoots(true), UsesMetadata(false) {}
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCs.h"
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/GCStrategy.h"
using namespace llvm;
#include "llvm/CodeGen/Passes.h"
#include "llvm/Analysis/Passes.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/RegAllocRegistry.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/CodeGen/FastISel.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/GCMetadata.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Instructions.h"
#include "llvm/CodeGen/FastISel.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
#include "llvm/CodeGen/GCMetadata.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Function.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "SelectionDAGBuilder.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
+#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/FunctionLoweringInfo.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/CodeGen/GCs.h"
#include "llvm/ADT/StringExtras.h"
-#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/IR/CallSite.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Value.h"
Dominators.cpp
Function.cpp
GCOV.cpp
+ GCStrategy.cpp
GVMaterializer.cpp
Globals.cpp
IRBuilder.cpp
}
}
+GCStrategy *Function::getGCStrategy() const {
+ // Lookup the GCStrategy (which is owned by the Context), given the name of
+ // the GC in question.
+ return getContext().pImpl->getGCStrategy(getGC());
+}
+
/// copyAttributesFrom - copy all additional attributes (those not needed to
/// create a Function) from the Function Src to this one.
void Function::copyAttributesFrom(const GlobalValue *Src) {
--- /dev/null
+//===-- GCStrategy.cpp - Garbage Collector Description --------------------===//
+//
+// 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 policy object GCStrategy which describes the
+// behavior of a given garbage collector.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/GCStrategy.h"
+
+using namespace llvm;
+
+GCStrategy::GCStrategy()
+ : UseStatepoints(false), NeededSafePoints(0), CustomReadBarriers(false),
+ CustomWriteBarriers(false), CustomRoots(false),
+ InitRoots(true), UsesMetadata(false) {}
#include "llvm/ADT/STLExtras.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/Module.h"
#include <algorithm>
using namespace llvm;
void GetElementPtrConstantExpr::anchor() { }
void CompareConstantExpr::anchor() { }
+
+GCStrategy *LLVMContextImpl::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();
+ }
+ }
+
+ // No GCStrategy found for that name, error reporting is the job of our
+ // callers.
+ return nullptr;
+}
+
+
class DiagnosticInfoOptimizationRemark;
class DiagnosticInfoOptimizationRemarkMissed;
class DiagnosticInfoOptimizationRemarkAnalysis;
+class GCStrategy;
class LLVMContext;
class Type;
class Value;
int getOrAddScopeRecordIdxEntry(MDNode *N, int ExistingIdx);
int getOrAddScopeInlinedAtIdxEntry(MDNode *Scope, MDNode *IA,int ExistingIdx);
+
+ /// An owning list of all GCStrategies which have been created
+ SmallVector<std::unique_ptr<GCStrategy>, 1> GCStrategyList;
+ /// A helper map to speedup lookups into the above list
+ StringMap<GCStrategy*> GCStrategyMap;
+
+ /// Lookup the GCStrategy object associated with the given gc name. If one
+ /// can't be found, returns nullptr. The lifetime of the returned objects
+ /// is dictated by the lifetime of the associated context. No caller should
+ /// attempt to delete the returned objects.
+ GCStrategy *getGCStrategy(const StringRef Name);
LLVMContextImpl(LLVMContext &C);
~LLVMContextImpl();
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