lib/Target/SystemZ/SystemZConstantPoolValue.h

   1 //===- SystemZConstantPoolValue.h - SystemZ constant-pool 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 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCONSTANTPOOLVALUE_H
  11 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCONSTANTPOOLVALUE_H
  12
  13 #include "llvm/CodeGen/MachineConstantPool.h"
  14 #include "llvm/Support/ErrorHandling.h"
  15
  16 namespace llvm {
  17
  18 class GlobalValue;
  19
  20 namespace SystemZCP {
  21 enum SystemZCPModifier {
  22   TLSGD,
  23   TLSLDM,
  24   DTPOFF,
  25   NTPOFF
  26 };
  27 } // end namespace SystemZCP
  28
  29 /// A SystemZ-specific constant pool value.  At present, the only
  30 /// defined constant pool values are module IDs or offsets of
  31 /// thread-local variables (written x@TLSGD, x@TLSLDM, x@DTPOFF,
  32 /// or x@NTPOFF).
  33 class SystemZConstantPoolValue : public MachineConstantPoolValue {
  34   const GlobalValue *GV;
  35   SystemZCP::SystemZCPModifier Modifier;
  36
  37 protected:
  38   SystemZConstantPoolValue(const GlobalValue *GV,
  39                            SystemZCP::SystemZCPModifier Modifier);
  40
  41 public:
  42   static SystemZConstantPoolValue *
  43     Create(const GlobalValue *GV, SystemZCP::SystemZCPModifier Modifier);
  44
  45   // Override MachineConstantPoolValue.
  46   int getExistingMachineCPValue(MachineConstantPool *CP,
  47                                 unsigned Alignment) override;
  48   void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
  49   void print(raw_ostream &O) const override;
  50
  51   // Access SystemZ-specific fields.
  52   const GlobalValue *getGlobalValue() const { return GV; }
  53   SystemZCP::SystemZCPModifier getModifier() const { return Modifier; }
  54 };
  55
  56 } // end namespace llvm
  57
  58 #endif