//===-- RegAllocPBQP.h ------------------------------------------*- C++ -*-===//
|
//
|
// The LLVM Compiler Infrastructure
|
//
|
// This file is distributed under the University of Illinois Open Source
|
// License. See LICENSE.TXT for details.
|
//
|
//===----------------------------------------------------------------------===//
|
//
|
// This file defines the PBQPBuilder interface, for classes which build PBQP
|
// instances to represent register allocation problems, and the RegAllocPBQP
|
// interface.
|
//
|
//===----------------------------------------------------------------------===//
|
|
#ifndef LLVM_CODEGEN_PBQPRACONSTRAINT_H
|
#define LLVM_CODEGEN_PBQPRACONSTRAINT_H
|
|
#include <memory>
|
#include <vector>
|
|
namespace llvm {
|
namespace PBQP {
|
namespace RegAlloc {
|
// Forward declare PBQP graph class.
|
class PBQPRAGraph;
|
}
|
}
|
|
class LiveIntervals;
|
class MachineBlockFrequencyInfo;
|
class MachineFunction;
|
class TargetRegisterInfo;
|
|
typedef PBQP::RegAlloc::PBQPRAGraph PBQPRAGraph;
|
|
/// @brief Abstract base for classes implementing PBQP register allocation
|
/// constraints (e.g. Spill-costs, interference, coalescing).
|
class PBQPRAConstraint {
|
public:
|
virtual ~PBQPRAConstraint() = 0;
|
virtual void apply(PBQPRAGraph &G) = 0;
|
private:
|
virtual void anchor();
|
};
|
|
/// @brief PBQP register allocation constraint composer.
|
///
|
/// Constraints added to this list will be applied, in the order that they are
|
/// added, to the PBQP graph.
|
class PBQPRAConstraintList : public PBQPRAConstraint {
|
public:
|
void apply(PBQPRAGraph &G) override {
|
for (auto &C : Constraints)
|
C->apply(G);
|
}
|
|
void addConstraint(std::unique_ptr<PBQPRAConstraint> C) {
|
if (C)
|
Constraints.push_back(std::move(C));
|
}
|
private:
|
std::vector<std::unique_ptr<PBQPRAConstraint>> Constraints;
|
void anchor() override;
|
};
|
|
}
|
|
#endif /* LLVM_CODEGEN_PBQPRACONSTRAINT_H */
|
