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//===-- CSKYConstantPoolValue.h - CSKY constantpool value -----*- C++ -*---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the CSKY specific constantpool value class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_CSKY_CONSTANTPOOLVALUE_H
#define LLVM_TARGET_CSKY_CONSTANTPOOLVALUE_H
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstddef>
namespace llvm {
class BlockAddress;
class Constant;
class GlobalValue;
class LLVMContext;
class MachineBasicBlock;
namespace CSKYCP {
enum CSKYCPKind {
CPValue,
CPExtSymbol,
CPBlockAddress,
CPMachineBasicBlock,
CPJT
};
enum CSKYCPModifier { NO_MOD, ADDR, GOT, GOTOFF, PLT, TLSLE, TLSIE, TLSGD };
} // namespace CSKYCP
/// CSKYConstantPoolValue - CSKY specific constantpool value. This is used to
/// represent PC-relative displacement between the address of the load
/// instruction and the constant being loaded, i.e. (&GV-(LPIC+8)).
class CSKYConstantPoolValue : public MachineConstantPoolValue {
protected:
CSKYCP::CSKYCPKind Kind; // Kind of constant.
unsigned PCAdjust; // Extra adjustment if constantpool is pc-relative.
CSKYCP::CSKYCPModifier Modifier; // GV modifier
bool AddCurrentAddress;
unsigned LabelId = 0;
CSKYConstantPoolValue(Type *Ty, CSKYCP::CSKYCPKind Kind, unsigned PCAdjust,
CSKYCP::CSKYCPModifier Modifier, bool AddCurrentAddress,
unsigned ID = 0);
public:
const char *getModifierText() const;
unsigned getPCAdjustment() const { return PCAdjust; }
bool mustAddCurrentAddress() const { return AddCurrentAddress; }
CSKYCP::CSKYCPModifier getModifier() const { return Modifier; }
unsigned getLabelID() const { return LabelId; }
bool isGlobalValue() const { return Kind == CSKYCP::CPValue; }
bool isExtSymbol() const { return Kind == CSKYCP::CPExtSymbol; }
bool isBlockAddress() const { return Kind == CSKYCP::CPBlockAddress; }
bool isMachineBasicBlock() const {
return Kind == CSKYCP::CPMachineBasicBlock;
}
bool isJT() const { return Kind == CSKYCP::CPJT; }
int getExistingMachineCPValue(MachineConstantPool *CP,
Align Alignment) override;
void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
void print(raw_ostream &O) const override;
bool equals(const CSKYConstantPoolValue *A) const {
return this->LabelId == A->LabelId && this->PCAdjust == A->PCAdjust &&
this->Modifier == A->Modifier;
}
template <typename Derived>
int getExistingMachineCPValueImpl(MachineConstantPool *CP, Align Alignment) {
const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants();
for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
if (Constants[i].isMachineConstantPoolEntry() &&
Constants[i].getAlign() >= Alignment) {
auto *CPV =
static_cast<CSKYConstantPoolValue *>(Constants[i].Val.MachineCPVal);
if (Derived *APC = dyn_cast<Derived>(CPV))
if (cast<Derived>(this)->equals(APC))
return i;
}
}
return -1;
}
};
/// CSKY-specific constant pool values for Constants,
/// Functions, and BlockAddresses.
class CSKYConstantPoolConstant : public CSKYConstantPoolValue {
const Constant *CVal; // Constant being loaded.
CSKYConstantPoolConstant(const Constant *C, CSKYCP::CSKYCPKind Kind,
unsigned PCAdjust, CSKYCP::CSKYCPModifier Modifier,
bool AddCurrentAddress, unsigned ID);
public:
static CSKYConstantPoolConstant *
Create(const Constant *C, CSKYCP::CSKYCPKind Kind, unsigned PCAdjust,
CSKYCP::CSKYCPModifier Modifier, bool AddCurrentAddress,
unsigned ID = 0);
const GlobalValue *getGV() const;
const BlockAddress *getBlockAddress() const;
int getExistingMachineCPValue(MachineConstantPool *CP,
Align Alignment) override;
void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
void print(raw_ostream &O) const override;
bool equals(const CSKYConstantPoolConstant *A) const {
return CVal == A->CVal && CSKYConstantPoolValue::equals(A);
}
static bool classof(const CSKYConstantPoolValue *APV) {
return APV->isGlobalValue() || APV->isBlockAddress();
}
};
/// CSKYConstantPoolSymbol - CSKY-specific constantpool values for external
/// symbols.
class CSKYConstantPoolSymbol : public CSKYConstantPoolValue {
const std::string S; // ExtSymbol being loaded.
CSKYConstantPoolSymbol(Type *Ty, const char *S, unsigned PCAdjust,
CSKYCP::CSKYCPModifier Modifier,
bool AddCurrentAddress);
public:
static CSKYConstantPoolSymbol *Create(Type *Ty, const char *S,
unsigned PCAdjust,
CSKYCP::CSKYCPModifier Modifier);
StringRef getSymbol() const { return S; }
int getExistingMachineCPValue(MachineConstantPool *CP,
Align Alignment) override;
void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
void print(raw_ostream &O) const override;
bool equals(const CSKYConstantPoolSymbol *A) const {
return S == A->S && CSKYConstantPoolValue::equals(A);
}
static bool classof(const CSKYConstantPoolValue *ACPV) {
return ACPV->isExtSymbol();
}
};
/// CSKYConstantPoolMBB - CSKY-specific constantpool value of a machine basic
/// block.
class CSKYConstantPoolMBB : public CSKYConstantPoolValue {
const MachineBasicBlock *MBB; // Machine basic block.
CSKYConstantPoolMBB(Type *Ty, const MachineBasicBlock *Mbb, unsigned PCAdjust,
CSKYCP::CSKYCPModifier Modifier, bool AddCurrentAddress);
public:
static CSKYConstantPoolMBB *Create(Type *Ty, const MachineBasicBlock *Mbb,
unsigned PCAdjust);
const MachineBasicBlock *getMBB() const { return MBB; }
int getExistingMachineCPValue(MachineConstantPool *CP,
Align Alignment) override;
void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
void print(raw_ostream &O) const override;
bool equals(const CSKYConstantPoolMBB *A) const {
return MBB == A->MBB && CSKYConstantPoolValue::equals(A);
}
static bool classof(const CSKYConstantPoolValue *ACPV) {
return ACPV->isMachineBasicBlock();
}
};
/// CSKY-specific constantpool value of a jump table.
class CSKYConstantPoolJT : public CSKYConstantPoolValue {
signed JTI; // Machine basic block.
CSKYConstantPoolJT(Type *Ty, int JTIndex, unsigned PCAdj,
CSKYCP::CSKYCPModifier Modifier, bool AddCurrentAddress);
public:
static CSKYConstantPoolJT *Create(Type *Ty, int JTI, unsigned PCAdj,
CSKYCP::CSKYCPModifier Modifier);
signed getJTI() { return JTI; }
int getExistingMachineCPValue(MachineConstantPool *CP,
Align Alignment) override;
void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
void print(raw_ostream &O) const override;
bool equals(const CSKYConstantPoolJT *A) const {
return JTI == A->JTI && CSKYConstantPoolValue::equals(A);
}
static bool classof(const CSKYConstantPoolValue *ACPV) {
return ACPV->isJT();
}
};
} // namespace llvm
#endif
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