lib/Target/ARM/ARMConstantPoolValue.h

   1 //===- ARMConstantPoolValue.h - ARM constantpool value ----------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the ARM specific constantpool value class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
  15 #define LLVM_TARGET_ARM_CONSTANTPOOLVALUE_H
  16
  17 #include "llvm/CodeGen/MachineConstantPool.h"
  18 #include <iosfwd>
  19
  20 namespace llvm {
  21
  22 class GlobalValue;
  23
  24 namespace ARMCP {
  25   enum ARMCPKind {
  26     CPValue,
  27     CPNonLazyPtr,
  28     CPStub
  29   };
  30 }
  31
  32 /// ARMConstantPoolValue - ARM specific constantpool value. This is used to
  33 /// represent PC relative displacement between the address of the load
  34 /// instruction and the global value being loaded, i.e. (&GV-(LPIC+8)).
  35 class ARMConstantPoolValue : public MachineConstantPoolValue {
  36   GlobalValue *GV;         // GlobalValue being loaded.
  37   const char *S;           // ExtSymbol being loaded.
  38   unsigned LabelId;        // Label id of the load.
  39   ARMCP::ARMCPKind Kind;   // non_lazy_ptr or stub?
  40   unsigned char PCAdjust;  // Extra adjustment if constantpool is pc relative.
  41                            // 8 for ARM, 4 for Thumb.
  42   const char *Modifier;    // GV modifier i.e. (&GV(modifier)-(LPIC+8))
  43   bool AddCurrentAddress;
  44
  45 public:
  46   ARMConstantPoolValue(GlobalValue *gv, unsigned id,
  47                        ARMCP::ARMCPKind Kind = ARMCP::CPValue,
  48                        unsigned char PCAdj = 0, const char *Modifier = NULL,
  49                        bool AddCurrentAddress = false);
  50   ARMConstantPoolValue(const char *s, unsigned id,
  51                        ARMCP::ARMCPKind Kind = ARMCP::CPValue,
  52                        unsigned char PCAdj = 0, const char *Modifier = NULL,
  53                        bool AddCurrentAddress = false);
  54   ARMConstantPoolValue(GlobalValue *GV, ARMCP::ARMCPKind Kind,
  55                        const char *Modifier);
  56
  57
  58   GlobalValue *getGV() const { return GV; }
  59   const char *getSymbol() const { return S; }
  60   const char *getModifier() const { return Modifier; }
  61   bool hasModifier() const { return Modifier != NULL; }
  62   bool mustAddCurrentAddress() const { return AddCurrentAddress; }
  63   unsigned getLabelId() const { return LabelId; }
  64   bool isNonLazyPointer() const { return Kind == ARMCP::CPNonLazyPtr; }
  65   bool isStub() const { return Kind == ARMCP::CPStub; }
  66   unsigned char getPCAdjustment() const { return PCAdjust; }
  67
  68   virtual int getExistingMachineCPValue(MachineConstantPool *CP,
  69                                         unsigned Alignment);
  70
  71   virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID);
  72
  73   void print(std::ostream *O) const { if (O) print(*O); }
  74   void print(std::ostream &O) const;
  75   void print(raw_ostream *O) const { if (O) print(*O); }
  76   void print(raw_ostream &O) const;
  77   void dump() const;
  78 };
  79
  80   inline std::ostream &operator<<(std::ostream &O, const ARMConstantPoolValue &V) {
  81   V.print(O);
  82   return O;
  83 }
  84
  85 inline raw_ostream &operator<<(raw_ostream &O, const ARMConstantPoolValue &V) {
  86   V.print(O);
  87   return O;
  88 }
  89
  90 } // End llvm namespace
  91
  92 #endif