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//===-- ARMConstantPoolValue.h - ARM constantpool value ---------*- C++ -*-===//
//
// 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 ARM specific constantpool value class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
#define LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstddef>
namespace llvm {
class BlockAddress;
class Constant;
class GlobalValue;
class LLVMContext;
class MachineBasicBlock;
namespace ARMCP {
enum ARMCPKind {
CPValue,
CPExtSymbol,
CPBlockAddress,
CPLSDA,
CPMachineBasicBlock
};
enum ARMCPModifier {
no_modifier,
TLSGD,
GOT,
GOTOFF,
GOTTPOFF,
TPOFF
};
}
/// ARMConstantPoolValue - ARM 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 ARMConstantPoolValue : public MachineConstantPoolValue {
unsigned LabelId; // Label id of the load.
ARMCP::ARMCPKind Kind; // Kind of constant.
unsigned char PCAdjust; // Extra adjustment if constantpool is pc-relative.
// 8 for ARM, 4 for Thumb.
ARMCP::ARMCPModifier Modifier; // GV modifier i.e. (&GV(modifier)-(LPIC+8))
bool AddCurrentAddress;
protected:
ARMConstantPoolValue(Type *Ty, unsigned id, ARMCP::ARMCPKind Kind,
unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
ARMConstantPoolValue(LLVMContext &C, unsigned id, ARMCP::ARMCPKind Kind,
unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
public:
virtual ~ARMConstantPoolValue();
ARMCP::ARMCPModifier getModifier() const { return Modifier; }
const char *getModifierText() const;
bool hasModifier() const { return Modifier != ARMCP::no_modifier; }
bool mustAddCurrentAddress() const { return AddCurrentAddress; }
unsigned getLabelId() const { return LabelId; }
unsigned char getPCAdjustment() const { return PCAdjust; }
bool isGlobalValue() const { return Kind == ARMCP::CPValue; }
bool isExtSymbol() const { return Kind == ARMCP::CPExtSymbol; }
bool isBlockAddress() const { return Kind == ARMCP::CPBlockAddress; }
bool isLSDA() const { return Kind == ARMCP::CPLSDA; }
bool isMachineBasicBlock() const{ return Kind == ARMCP::CPMachineBasicBlock; }
virtual unsigned getRelocationInfo() const { return 2; }
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment);
virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID);
/// hasSameValue - Return true if this ARM constpool value can share the same
/// constantpool entry as another ARM constpool value.
virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
bool equals(const ARMConstantPoolValue *A) const {
return this->LabelId == A->LabelId &&
this->PCAdjust == A->PCAdjust &&
this->Modifier == A->Modifier;
}
virtual void print(raw_ostream &O) const;
void print(raw_ostream *O) const { if (O) print(*O); }
void dump() const;
static bool classof(const ARMConstantPoolValue *) { return true; }
};
inline raw_ostream &operator<<(raw_ostream &O, const ARMConstantPoolValue &V) {
V.print(O);
return O;
}
/// ARMConstantPoolConstant - ARM-specific constant pool values for Constants,
/// Functions, and BlockAddresses.
class ARMConstantPoolConstant : public ARMConstantPoolValue {
const Constant *CVal; // Constant being loaded.
ARMConstantPoolConstant(const Constant *C,
unsigned ID,
ARMCP::ARMCPKind Kind,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
ARMConstantPoolConstant(Type *Ty, const Constant *C,
unsigned ID,
ARMCP::ARMCPKind Kind,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
public:
static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID);
static ARMConstantPoolConstant *Create(const GlobalValue *GV,
ARMCP::ARMCPModifier Modifier);
static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID,
ARMCP::ARMCPKind Kind,
unsigned char PCAdj);
static ARMConstantPoolConstant *Create(const Constant *C, unsigned ID,
ARMCP::ARMCPKind Kind,
unsigned char PCAdj,
ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
const GlobalValue *getGV() const;
const BlockAddress *getBlockAddress() const;
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment);
/// hasSameValue - Return true if this ARM constpool value can share the same
/// constantpool entry as another ARM constpool value.
virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID);
virtual void print(raw_ostream &O) const;
static bool classof(const ARMConstantPoolValue *APV) {
return APV->isGlobalValue() || APV->isBlockAddress() || APV->isLSDA();
}
static bool classof(const ARMConstantPoolConstant *) { return true; }
};
/// ARMConstantPoolSymbol - ARM-specific constantpool values for external
/// symbols.
class ARMConstantPoolSymbol : public ARMConstantPoolValue {
const char *S; // ExtSymbol being loaded.
ARMConstantPoolSymbol(LLVMContext &C, const char *s, unsigned id,
unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
public:
~ARMConstantPoolSymbol();
static ARMConstantPoolSymbol *Create(LLVMContext &C, const char *s,
unsigned ID, unsigned char PCAdj);
const char *getSymbol() const { return S; }
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment);
virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID);
/// hasSameValue - Return true if this ARM constpool value can share the same
/// constantpool entry as another ARM constpool value.
virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
virtual void print(raw_ostream &O) const;
static bool classof(const ARMConstantPoolValue *ACPV) {
return ACPV->isExtSymbol();
}
static bool classof(const ARMConstantPoolSymbol *) { return true; }
};
/// ARMConstantPoolMBB - ARM-specific constantpool value of a machine basic
/// block.
class ARMConstantPoolMBB : public ARMConstantPoolValue {
const MachineBasicBlock *MBB; // Machine basic block.
ARMConstantPoolMBB(LLVMContext &C, const MachineBasicBlock *mbb, unsigned id,
unsigned char PCAdj, ARMCP::ARMCPModifier Modifier,
bool AddCurrentAddress);
public:
static ARMConstantPoolMBB *Create(LLVMContext &C,
const MachineBasicBlock *mbb,
unsigned ID, unsigned char PCAdj);
const MachineBasicBlock *getMBB() const { return MBB; }
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment);
virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID);
/// hasSameValue - Return true if this ARM constpool value can share the same
/// constantpool entry as another ARM constpool value.
virtual bool hasSameValue(ARMConstantPoolValue *ACPV);
virtual void print(raw_ostream &O) const;
static bool classof(const ARMConstantPoolValue *ACPV) {
return ACPV->isMachineBasicBlock();
}
static bool classof(const ARMConstantPoolMBB *) { return true; }
};
} // End llvm namespace
#endif
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