[llvm] r226311 - Move ownership of GCStrategy objects to LLVMContext
Philip Reames
listmail at philipreames.com
Fri Jan 16 12:07:34 PST 2015
Author: reames
Date: Fri Jan 16 14:07:33 2015
New Revision: 226311
URL: http://llvm.org/viewvc/llvm-project?rev=226311&view=rev
Log:
Move ownership of GCStrategy objects to LLVMContext
Note: This change ended up being slightly more controversial than expected. Chandler has tentatively okayed this for the moment, but I may be revisiting this in the near future after we settle some high level questions.
Rather than have the GCStrategy object owned by the GCModuleInfo - which is an immutable analysis pass used mainly by gc.root - have it be owned by the LLVMContext. This simplifies the ownership logic (i.e. can you have two instances of the same strategy at once?), but more importantly, allows us to access the GCStrategy in the middle end optimizer. To this end, I add an accessor through Function which becomes the canonical way to get at a GCStrategy instance.
In the near future, this will allows me to move some of the checks from http://reviews.llvm.org/D6808 into the Verifier itself, and to introduce optimization legality predicates for some of the recent additions to InstCombine. (These will follow as separate changes.)
Differential Revision: http://reviews.llvm.org/D6811
Added:
llvm/trunk/include/llvm/IR/GCStrategy.h
llvm/trunk/lib/IR/GCStrategy.cpp
Removed:
llvm/trunk/include/llvm/CodeGen/GCStrategy.h
llvm/trunk/lib/CodeGen/GCStrategy.cpp
Modified:
llvm/trunk/include/llvm/CodeGen/GCMetadata.h
llvm/trunk/include/llvm/CodeGen/GCMetadataPrinter.h
llvm/trunk/include/llvm/IR/Function.h
llvm/trunk/include/llvm/Support/Registry.h
llvm/trunk/lib/CodeGen/CMakeLists.txt
llvm/trunk/lib/CodeGen/ErlangGC.cpp
llvm/trunk/lib/CodeGen/GCMetadata.cpp
llvm/trunk/lib/CodeGen/GCRootLowering.cpp
llvm/trunk/lib/CodeGen/OcamlGC.cpp
llvm/trunk/lib/CodeGen/Passes.cpp
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
llvm/trunk/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
llvm/trunk/lib/CodeGen/ShadowStackGC.cpp
llvm/trunk/lib/CodeGen/StatepointExampleGC.cpp
llvm/trunk/lib/IR/CMakeLists.txt
llvm/trunk/lib/IR/Function.cpp
llvm/trunk/lib/IR/LLVMContextImpl.cpp
llvm/trunk/lib/IR/LLVMContextImpl.h
Modified: llvm/trunk/include/llvm/CodeGen/GCMetadata.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/GCMetadata.h?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/GCMetadata.h (original)
+++ llvm/trunk/include/llvm/CodeGen/GCMetadata.h Fri Jan 16 14:07:33 2015
@@ -36,26 +36,15 @@
#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 {
@@ -163,14 +152,9 @@ namespace llvm {
/// 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.
@@ -190,7 +174,7 @@ namespace llvm {
finfo_map_type FInfoMap;
public:
- typedef list_type::const_iterator iterator;
+ typedef std::vector<GCStrategy*>::const_iterator iterator;
static char ID;
Modified: llvm/trunk/include/llvm/CodeGen/GCMetadataPrinter.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/GCMetadataPrinter.h?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/GCMetadataPrinter.h (original)
+++ llvm/trunk/include/llvm/CodeGen/GCMetadataPrinter.h Fri Jan 16 14:07:33 2015
@@ -21,7 +21,7 @@
#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 {
Removed: llvm/trunk/include/llvm/CodeGen/GCStrategy.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/GCStrategy.h?rev=226310&view=auto
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/GCStrategy.h (original)
+++ llvm/trunk/include/llvm/CodeGen/GCStrategy.h (removed)
@@ -1,182 +0,0 @@
-//===-- 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
Modified: llvm/trunk/include/llvm/IR/Function.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/Function.h?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/Function.h (original)
+++ llvm/trunk/include/llvm/IR/Function.h Fri Jan 16 14:07:33 2015
@@ -29,6 +29,7 @@
namespace llvm {
class FunctionType;
+class GCStrategy;
class LLVMContext;
// Traits for intrusive list of basic blocks...
@@ -225,6 +226,10 @@ public:
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);
Added: llvm/trunk/include/llvm/IR/GCStrategy.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/GCStrategy.h?rev=226311&view=auto
==============================================================================
--- llvm/trunk/include/llvm/IR/GCStrategy.h (added)
+++ llvm/trunk/include/llvm/IR/GCStrategy.h Fri Jan 16 14:07:33 2015
@@ -0,0 +1,196 @@
+//===-- 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
Modified: llvm/trunk/include/llvm/Support/Registry.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/Registry.h?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/Registry.h (original)
+++ llvm/trunk/include/llvm/Support/Registry.h Fri Jan 16 14:07:33 2015
@@ -120,6 +120,10 @@ namespace llvm {
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:
Modified: llvm/trunk/lib/CodeGen/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/CMakeLists.txt?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/CMakeLists.txt (original)
+++ llvm/trunk/lib/CodeGen/CMakeLists.txt Fri Jan 16 14:07:33 2015
@@ -23,7 +23,6 @@ add_llvm_library(LLVMCodeGen
GCMetadata.cpp
GCMetadataPrinter.cpp
GCRootLowering.cpp
- GCStrategy.cpp
GlobalMerge.cpp
IfConversion.cpp
InlineSpiller.cpp
Modified: llvm/trunk/lib/CodeGen/ErlangGC.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/ErlangGC.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/ErlangGC.cpp (original)
+++ llvm/trunk/lib/CodeGen/ErlangGC.cpp Fri Jan 16 14:07:33 2015
@@ -15,8 +15,8 @@
//===----------------------------------------------------------------------===//
#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"
Modified: llvm/trunk/lib/CodeGen/GCMetadata.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GCMetadata.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/GCMetadata.cpp (original)
+++ llvm/trunk/lib/CodeGen/GCMetadata.cpp Fri Jan 16 14:07:33 2015
@@ -12,10 +12,10 @@
//===----------------------------------------------------------------------===//
#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"
@@ -61,27 +61,6 @@ GCModuleInfo::GCModuleInfo()
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());
@@ -90,7 +69,15 @@ GCFunctionInfo &GCModuleInfo::getFunctio
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;
@@ -100,7 +87,6 @@ GCFunctionInfo &GCModuleInfo::getFunctio
void GCModuleInfo::clear() {
Functions.clear();
FInfoMap.clear();
- StrategyMap.clear();
StrategyList.clear();
}
Modified: llvm/trunk/lib/CodeGen/GCRootLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GCRootLowering.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/GCRootLowering.cpp (original)
+++ llvm/trunk/lib/CodeGen/GCRootLowering.cpp Fri Jan 16 14:07:33 2015
@@ -11,13 +11,14 @@
//
//===----------------------------------------------------------------------===//
-#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"
Removed: llvm/trunk/lib/CodeGen/GCStrategy.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/GCStrategy.cpp?rev=226310&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/GCStrategy.cpp (original)
+++ llvm/trunk/lib/CodeGen/GCStrategy.cpp (removed)
@@ -1,22 +0,0 @@
-//===-- 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) {}
Modified: llvm/trunk/lib/CodeGen/OcamlGC.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/OcamlGC.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/OcamlGC.cpp (original)
+++ llvm/trunk/lib/CodeGen/OcamlGC.cpp Fri Jan 16 14:07:33 2015
@@ -15,7 +15,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/GCs.h"
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/GCStrategy.h"
using namespace llvm;
Modified: llvm/trunk/lib/CodeGen/Passes.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/Passes.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/Passes.cpp (original)
+++ llvm/trunk/lib/CodeGen/Passes.cpp Fri Jan 16 14:07:33 2015
@@ -14,7 +14,6 @@
#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"
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp Fri Jan 16 14:07:33 2015
@@ -26,7 +26,6 @@
#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"
@@ -41,6 +40,7 @@
#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"
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Fri Jan 16 14:07:33 2015
@@ -24,7 +24,6 @@
#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"
@@ -36,6 +35,7 @@
#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"
Modified: llvm/trunk/lib/CodeGen/SelectionDAG/StatepointLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/StatepointLowering.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/StatepointLowering.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/StatepointLowering.cpp Fri Jan 16 14:07:33 2015
@@ -16,11 +16,12 @@
#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"
Modified: llvm/trunk/lib/CodeGen/ShadowStackGC.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/ShadowStackGC.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/ShadowStackGC.cpp (original)
+++ llvm/trunk/lib/CodeGen/ShadowStackGC.cpp Fri Jan 16 14:07:33 2015
@@ -27,8 +27,8 @@
#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"
Modified: llvm/trunk/lib/CodeGen/StatepointExampleGC.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/StatepointExampleGC.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/StatepointExampleGC.cpp (original)
+++ llvm/trunk/lib/CodeGen/StatepointExampleGC.cpp Fri Jan 16 14:07:33 2015
@@ -16,7 +16,7 @@
//
//===----------------------------------------------------------------------===//
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Value.h"
Modified: llvm/trunk/lib/IR/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/CMakeLists.txt?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/IR/CMakeLists.txt (original)
+++ llvm/trunk/lib/IR/CMakeLists.txt Fri Jan 16 14:07:33 2015
@@ -17,6 +17,7 @@ add_llvm_library(LLVMCore
Dominators.cpp
Function.cpp
GCOV.cpp
+ GCStrategy.cpp
GVMaterializer.cpp
Globals.cpp
IRBuilder.cpp
Modified: llvm/trunk/lib/IR/Function.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/Function.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/IR/Function.cpp (original)
+++ llvm/trunk/lib/IR/Function.cpp Fri Jan 16 14:07:33 2015
@@ -386,6 +386,12 @@ void Function::clearGC() {
}
}
+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) {
Added: llvm/trunk/lib/IR/GCStrategy.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/GCStrategy.cpp?rev=226311&view=auto
==============================================================================
--- llvm/trunk/lib/IR/GCStrategy.cpp (added)
+++ llvm/trunk/lib/IR/GCStrategy.cpp Fri Jan 16 14:07:33 2015
@@ -0,0 +1,22 @@
+//===-- 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) {}
Modified: llvm/trunk/lib/IR/LLVMContextImpl.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/LLVMContextImpl.cpp?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/IR/LLVMContextImpl.cpp (original)
+++ llvm/trunk/lib/IR/LLVMContextImpl.cpp Fri Jan 16 14:07:33 2015
@@ -15,6 +15,7 @@
#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;
@@ -182,3 +183,26 @@ void InsertValueConstantExpr::anchor() {
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;
+}
+
+
Modified: llvm/trunk/lib/IR/LLVMContextImpl.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/LLVMContextImpl.h?rev=226311&r1=226310&r2=226311&view=diff
==============================================================================
--- llvm/trunk/lib/IR/LLVMContextImpl.h (original)
+++ llvm/trunk/lib/IR/LLVMContextImpl.h Fri Jan 16 14:07:33 2015
@@ -41,6 +41,7 @@ class ConstantFP;
class DiagnosticInfoOptimizationRemark;
class DiagnosticInfoOptimizationRemarkMissed;
class DiagnosticInfoOptimizationRemarkAnalysis;
+class GCStrategy;
class LLVMContext;
class Type;
class Value;
@@ -389,6 +390,17 @@ public:
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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