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Diffstat (limited to 'contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h')
-rw-r--r-- | contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h b/contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h new file mode 100644 index 0000000..6f4eddf --- /dev/null +++ b/contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h @@ -0,0 +1,100 @@ +//===- 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 { + +class Constant; +class BlockAddress; +class GlobalValue; +class LLVMContext; + +namespace ARMCP { + enum ARMCPKind { + CPValue, + CPExtSymbol, + CPBlockAddress, + CPLSDA + }; +} + +/// 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 { + const Constant *CVal; // Constant being loaded. + const char *S; // ExtSymbol being loaded. + 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. + const char *Modifier; // GV modifier i.e. (&GV(modifier)-(LPIC+8)) + bool AddCurrentAddress; + +public: + ARMConstantPoolValue(const Constant *cval, unsigned id, + ARMCP::ARMCPKind Kind = ARMCP::CPValue, + unsigned char PCAdj = 0, const char *Modifier = NULL, + bool AddCurrentAddress = false); + ARMConstantPoolValue(LLVMContext &C, const char *s, unsigned id, + unsigned char PCAdj = 0, const char *Modifier = NULL, + bool AddCurrentAddress = false); + ARMConstantPoolValue(const GlobalValue *GV, const char *Modifier); + ARMConstantPoolValue(); + ~ARMConstantPoolValue(); + + const GlobalValue *getGV() const; + const char *getSymbol() const { return S; } + const BlockAddress *getBlockAddress() const; + const char *getModifier() const { return Modifier; } + bool hasModifier() const { return Modifier != NULL; } + 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() { return Kind == ARMCP::CPBlockAddress; } + bool isLSDA() { return Kind == ARMCP::CPLSDA; } + + virtual unsigned getRelocationInfo() const { + // FIXME: This is conservatively claiming that these entries require a + // relocation, we may be able to do better than this. + 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. + bool hasSameValue(ARMConstantPoolValue *ACPV); + + void print(raw_ostream *O) const { if (O) print(*O); } + void print(raw_ostream &O) const; + void dump() const; +}; + +inline raw_ostream &operator<<(raw_ostream &O, const ARMConstantPoolValue &V) { + V.print(O); + return O; +} + +} // End llvm namespace + +#endif |