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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"
namespace llvm {
namespace ARMCP {
enum ARMCPKind {
CPValue,
CPNonLazyPtr,
CPStub
};
}
/// ARMConstantPoolValue - ARM specific constantpool value. This is used to
/// represent PC relative displacement between the address of the load
/// instruction and the global value being loaded, i.e. (&GV-(LPIC+8)).
class ARMConstantPoolValue : public MachineConstantPoolValue {
GlobalValue *GV; // GlobalValue being loaded.
const char *S; // ExtSymbol being loaded.
unsigned LabelId; // Label id of the load.
ARMCP::ARMCPKind Kind; // non_lazy_ptr or stub?
unsigned char PCAdjust; // Extra adjustment if constantpool is pc relative.
// 8 for ARM, 4 for Thumb.
const char *Modifier; // GV modifier i.e. (&GV(modifier)-(LPIC+8))
bool AddCurrentAddress;
public:
ARMConstantPoolValue(GlobalValue *gv, unsigned id,
ARMCP::ARMCPKind Kind = ARMCP::CPValue,
unsigned char PCAdj = 0, const char *Modifier = NULL,
bool AddCurrentAddress = false);
ARMConstantPoolValue(const char *s, unsigned id,
ARMCP::ARMCPKind Kind = ARMCP::CPValue,
unsigned char PCAdj = 0, const char *Modifier = NULL,
bool AddCurrentAddress = false);
ARMConstantPoolValue(GlobalValue *GV, ARMCP::ARMCPKind Kind,
const char *Modifier);
GlobalValue *getGV() const { return GV; }
const char *getSymbol() const { return S; }
const char *getModifier() const { return Modifier; }
bool hasModifier() const { return Modifier != NULL; }
bool mustAddCurrentAddress() const { return AddCurrentAddress; }
unsigned getLabelId() const { return LabelId; }
bool isNonLazyPointer() const { return Kind == ARMCP::CPNonLazyPtr; }
bool isStub() const { return Kind == ARMCP::CPStub; }
unsigned char getPCAdjustment() const { return PCAdjust; }
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment);
virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID);
virtual void print(std::ostream &O) const;
};
}
#endif
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