#define LLVM_CODEGEN_REGALLOCPBQP_H
#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/PBQPRAConstraint.h"
#include "llvm/CodeGen/PBQP/CostAllocator.h"
#include "llvm/CodeGen/PBQP/ReductionRules.h"
+#include "llvm/CodeGen/PBQPRAConstraint.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
std::unique_ptr<bool[]> UnsafeCols;
};
+/// \brief Holds a vector of the allowed physical regs for a vreg.
+class AllowedRegVector {
+ friend hash_code hash_value(const AllowedRegVector &);
+public:
+
+ AllowedRegVector() : NumOpts(0), Opts(nullptr) {}
+
+ AllowedRegVector(const std::vector<unsigned> &OptVec)
+ : NumOpts(OptVec.size()), Opts(new unsigned[NumOpts]) {
+ std::copy(OptVec.begin(), OptVec.end(), Opts.get());
+ }
+
+ AllowedRegVector(const AllowedRegVector &Other)
+ : NumOpts(Other.NumOpts), Opts(new unsigned[NumOpts]) {
+ std::copy(Other.Opts.get(), Other.Opts.get() + NumOpts, Opts.get());
+ }
+
+ AllowedRegVector(AllowedRegVector &&Other)
+ : NumOpts(std::move(Other.NumOpts)), Opts(std::move(Other.Opts)) {}
+
+ AllowedRegVector& operator=(const AllowedRegVector &Other) {
+ NumOpts = Other.NumOpts;
+ Opts.reset(new unsigned[NumOpts]);
+ std::copy(Other.Opts.get(), Other.Opts.get() + NumOpts, Opts.get());
+ return *this;
+ }
+
+ AllowedRegVector& operator=(AllowedRegVector &&Other) {
+ NumOpts = std::move(Other.NumOpts);
+ Opts = std::move(Other.Opts);
+ return *this;
+ }
+
+ unsigned size() const { return NumOpts; }
+ unsigned operator[](size_t I) const { return Opts[I]; }
+
+ bool operator==(const AllowedRegVector &Other) const {
+ if (NumOpts != Other.NumOpts)
+ return false;
+ return std::equal(Opts.get(), Opts.get() + NumOpts, Other.Opts.get());
+ }
+
+ bool operator!=(const AllowedRegVector &Other) const {
+ return !(*this == Other);
+ }
+
+private:
+ unsigned NumOpts;
+ std::unique_ptr<unsigned[]> Opts;
+};
+
+inline hash_code hash_value(const AllowedRegVector &OptRegs) {
+ unsigned *OStart = OptRegs.Opts.get();
+ unsigned *OEnd = OptRegs.Opts.get() + OptRegs.NumOpts;
+ return hash_combine(OptRegs.NumOpts,
+ hash_combine_range(OStart, OEnd));
+}
+
+/// \brief Holds graph-level metadata relevent to PBQP RA problems.
+class GraphMetadata {
+private:
+ typedef ValuePool<AllowedRegVector> AllowedRegVecPool;
+public:
+
+ typedef AllowedRegVecPool::PoolRef AllowedRegVecRef;
+
+ GraphMetadata(MachineFunction &MF,
+ LiveIntervals &LIS,
+ MachineBlockFrequencyInfo &MBFI)
+ : MF(MF), LIS(LIS), MBFI(MBFI) {}
+
+ MachineFunction &MF;
+ LiveIntervals &LIS;
+ MachineBlockFrequencyInfo &MBFI;
+
+ void setNodeIdForVReg(unsigned VReg, GraphBase::NodeId NId) {
+ VRegToNodeId[VReg] = NId;
+ }
+
+ GraphBase::NodeId getNodeIdForVReg(unsigned VReg) const {
+ auto VRegItr = VRegToNodeId.find(VReg);
+ if (VRegItr == VRegToNodeId.end())
+ return GraphBase::invalidNodeId();
+ return VRegItr->second;
+ }
+
+ void eraseNodeIdForVReg(unsigned VReg) {
+ VRegToNodeId.erase(VReg);
+ }
+
+ AllowedRegVecRef getAllowedRegs(AllowedRegVector Allowed) {
+ return AllowedRegVecs.getValue(std::move(Allowed));
+ }
+
+private:
+ DenseMap<unsigned, GraphBase::NodeId> VRegToNodeId;
+ AllowedRegVecPool AllowedRegVecs;
+};
+
+/// \brief Holds solver state and other metadata relevant to each PBQP RA node.
class NodeMetadata {
public:
- typedef std::vector<unsigned> OptionToRegMap;
+ typedef RegAlloc::AllowedRegVector AllowedRegVector;
typedef enum { Unprocessed,
OptimallyReducible,
ConservativelyAllocatable,
NotProvablyAllocatable } ReductionState;
- NodeMetadata() : RS(Unprocessed), DeniedOpts(0), OptUnsafeEdges(nullptr){}
+ NodeMetadata()
+ : RS(Unprocessed), NumOpts(0), DeniedOpts(0), OptUnsafeEdges(nullptr),
+ VReg(0) {}
+
+ // FIXME: Re-implementing default behavior to work around MSVC. Remove once
+ // MSVC synthesizes move constructors properly.
+ NodeMetadata(const NodeMetadata &Other)
+ : RS(Other.RS), NumOpts(Other.NumOpts), DeniedOpts(Other.DeniedOpts),
+ OptUnsafeEdges(new unsigned[NumOpts]), VReg(Other.VReg),
+ AllowedRegs(Other.AllowedRegs) {
+ if (NumOpts > 0) {
+ std::copy(&Other.OptUnsafeEdges[0], &Other.OptUnsafeEdges[NumOpts],
+ &OptUnsafeEdges[0]);
+ }
+ }
+ // FIXME: Re-implementing default behavior to work around MSVC. Remove once
+ // MSVC synthesizes move constructors properly.
NodeMetadata(NodeMetadata &&Other)
: RS(Other.RS), NumOpts(Other.NumOpts), DeniedOpts(Other.DeniedOpts),
OptUnsafeEdges(std::move(Other.OptUnsafeEdges)), VReg(Other.VReg),
- OptionRegs(std::move(Other.OptionRegs)) {}
+ AllowedRegs(std::move(Other.AllowedRegs)) {}
+ // FIXME: Re-implementing default behavior to work around MSVC. Remove once
+ // MSVC synthesizes move constructors properly.
+ NodeMetadata& operator=(const NodeMetadata &Other) {
+ RS = Other.RS;
+ NumOpts = Other.NumOpts;
+ DeniedOpts = Other.DeniedOpts;
+ OptUnsafeEdges.reset(new unsigned[NumOpts]);
+ std::copy(Other.OptUnsafeEdges.get(), Other.OptUnsafeEdges.get() + NumOpts,
+ OptUnsafeEdges.get());
+ VReg = Other.VReg;
+ AllowedRegs = Other.AllowedRegs;
+ return *this;
+ }
+
+ // FIXME: Re-implementing default behavior to work around MSVC. Remove once
+ // MSVC synthesizes move constructors properly.
NodeMetadata& operator=(NodeMetadata &&Other) {
RS = Other.RS;
NumOpts = Other.NumOpts;
DeniedOpts = Other.DeniedOpts;
OptUnsafeEdges = std::move(Other.OptUnsafeEdges);
VReg = Other.VReg;
- OptionRegs = std::move(Other.OptionRegs);
+ AllowedRegs = std::move(Other.AllowedRegs);
return *this;
}
void setVReg(unsigned VReg) { this->VReg = VReg; }
unsigned getVReg() const { return VReg; }
- void setOptionRegs(OptionToRegMap OptionRegs) {
- this->OptionRegs = std::move(OptionRegs);
+ void setAllowedRegs(GraphMetadata::AllowedRegVecRef AllowedRegs) {
+ this->AllowedRegs = std::move(AllowedRegs);
}
- const OptionToRegMap& getOptionRegs() const { return OptionRegs; }
+ const AllowedRegVector& getAllowedRegs() const { return *AllowedRegs; }
void setup(const Vector& Costs) {
NumOpts = Costs.getLength() - 1;
void setReductionState(ReductionState RS) { this->RS = RS; }
void handleAddEdge(const MatrixMetadata& MD, bool Transpose) {
- DeniedOpts += Transpose ? MD.getWorstCol() : MD.getWorstRow();
+ DeniedOpts += Transpose ? MD.getWorstRow() : MD.getWorstCol();
const bool* UnsafeOpts =
Transpose ? MD.getUnsafeCols() : MD.getUnsafeRows();
for (unsigned i = 0; i < NumOpts; ++i)
}
void handleRemoveEdge(const MatrixMetadata& MD, bool Transpose) {
- DeniedOpts -= Transpose ? MD.getWorstCol() : MD.getWorstRow();
+ DeniedOpts -= Transpose ? MD.getWorstRow() : MD.getWorstCol();
const bool* UnsafeOpts =
Transpose ? MD.getUnsafeCols() : MD.getUnsafeRows();
for (unsigned i = 0; i < NumOpts; ++i)
}
private:
- NodeMetadata(const NodeMetadata&) LLVM_DELETED_FUNCTION;
- void operator=(const NodeMetadata&) LLVM_DELETED_FUNCTION;
-
ReductionState RS;
unsigned NumOpts;
unsigned DeniedOpts;
std::unique_ptr<unsigned[]> OptUnsafeEdges;
unsigned VReg;
- OptionToRegMap OptionRegs;
+ GraphMetadata::AllowedRegVecRef AllowedRegs;
};
class RegAllocSolverImpl {
typedef GraphBase::EdgeId EdgeId;
typedef RegAlloc::NodeMetadata NodeMetadata;
-
struct EdgeMetadata { };
-
- class GraphMetadata {
- public:
- GraphMetadata(MachineFunction &MF,
- LiveIntervals &LIS,
- MachineBlockFrequencyInfo &MBFI)
- : MF(MF), LIS(LIS), MBFI(MBFI) {}
-
- MachineFunction &MF;
- LiveIntervals &LIS;
- MachineBlockFrequencyInfo &MBFI;
-
- void setNodeIdForVReg(unsigned VReg, GraphBase::NodeId NId) {
- VRegToNodeId[VReg] = NId;
- }
-
- GraphBase::NodeId getNodeIdForVReg(unsigned VReg) const {
- auto VRegItr = VRegToNodeId.find(VReg);
- if (VRegItr == VRegToNodeId.end())
- return GraphBase::invalidNodeId();
- return VRegItr->second;
- }
-
- void eraseNodeIdForVReg(unsigned VReg) {
- VRegToNodeId.erase(VReg);
- }
-
- private:
- DenseMap<unsigned, NodeId> VRegToNodeId;
- };
+ typedef RegAlloc::GraphMetadata GraphMetadata;
typedef PBQP::Graph<RegAllocSolverImpl> Graph;
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