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Diffstat (limited to 'contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h')
| -rw-r--r-- | contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h | 259 |
1 files changed, 259 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..c7a8415 --- /dev/null +++ b/contrib/llvm/lib/Target/ARM/ARMConstantPoolValue.h @@ -0,0 +1,259 @@ +//===-- 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/Casting.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); + + template <typename Derived> + int getExistingMachineCPValueImpl(MachineConstantPool *CP, + unsigned Alignment) { + unsigned AlignMask = Alignment - 1; + const std::vector<MachineConstantPoolEntry> &Constants = CP->getConstants(); + for (unsigned i = 0, e = Constants.size(); i != e; ++i) { + if (Constants[i].isMachineConstantPoolEntry() && + (Constants[i].getAlignment() & AlignMask) == 0) { + ARMConstantPoolValue *CPV = + (ARMConstantPoolValue *)Constants[i].Val.MachineCPVal; + if (Derived *APC = dyn_cast<Derived>(CPV)) + if (cast<Derived>(this)->equals(APC)) + return i; + } + } + + return -1; + } + +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; } + + unsigned getRelocationInfo() const override { return 2; } + + int getExistingMachineCPValue(MachineConstantPool *CP, + unsigned Alignment) override; + + void addSelectionDAGCSEId(FoldingSetNodeID &ID) override; + + /// 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; + } + + void print(raw_ostream &O) const override; + void print(raw_ostream *O) const { if (O) print(*O); } + void dump() const; +}; + +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; + + int getExistingMachineCPValue(MachineConstantPool *CP, + unsigned Alignment) override; + + /// hasSameValue - Return true if this ARM constpool value can share the same + /// constantpool entry as another ARM constpool value. + bool hasSameValue(ARMConstantPoolValue *ACPV) override; + + void addSelectionDAGCSEId(FoldingSetNodeID &ID) override; + + void print(raw_ostream &O) const override; + static bool classof(const ARMConstantPoolValue *APV) { + return APV->isGlobalValue() || APV->isBlockAddress() || APV->isLSDA(); + } + + bool equals(const ARMConstantPoolConstant *A) const { + return CVal == A->CVal && ARMConstantPoolValue::equals(A); + } +}; + +/// ARMConstantPoolSymbol - ARM-specific constantpool values for external +/// symbols. +class ARMConstantPoolSymbol : public ARMConstantPoolValue { + const std::string S; // ExtSymbol being loaded. + + ARMConstantPoolSymbol(LLVMContext &C, const char *s, unsigned id, + unsigned char PCAdj, ARMCP::ARMCPModifier Modifier, + bool AddCurrentAddress); + +public: + static ARMConstantPoolSymbol *Create(LLVMContext &C, const char *s, + unsigned ID, unsigned char PCAdj); + + const char *getSymbol() const { return S.c_str(); } + + int getExistingMachineCPValue(MachineConstantPool *CP, + unsigned Alignment) override; + + void addSelectionDAGCSEId(FoldingSetNodeID &ID) override; + + /// hasSameValue - Return true if this ARM constpool value can share the same + /// constantpool entry as another ARM constpool value. + bool hasSameValue(ARMConstantPoolValue *ACPV) override; + + void print(raw_ostream &O) const override; + + static bool classof(const ARMConstantPoolValue *ACPV) { + return ACPV->isExtSymbol(); + } + + bool equals(const ARMConstantPoolSymbol *A) const { + return S == A->S && ARMConstantPoolValue::equals(A); + } +}; + +/// 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; } + + int getExistingMachineCPValue(MachineConstantPool *CP, + unsigned Alignment) override; + + void addSelectionDAGCSEId(FoldingSetNodeID &ID) override; + + /// hasSameValue - Return true if this ARM constpool value can share the same + /// constantpool entry as another ARM constpool value. + bool hasSameValue(ARMConstantPoolValue *ACPV) override; + + void print(raw_ostream &O) const override; + + static bool classof(const ARMConstantPoolValue *ACPV) { + return ACPV->isMachineBasicBlock(); + } + + bool equals(const ARMConstantPoolMBB *A) const { + return MBB == A->MBB && ARMConstantPoolValue::equals(A); + } +}; + +} // End llvm namespace + +#endif |
