lib/Target/SystemZ/SystemZConstantPoolValue.h

   1 //===- SystemZConstantPoolValue.h - SystemZ constant-pool value -*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCONSTANTPOOLVALUE_H
  10 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZCONSTANTPOOLVALUE_H
  11
  12 #include "llvm/CodeGen/MachineConstantPool.h"
  13 #include "llvm/Support/ErrorHandling.h"
  14
  15 namespace llvm {
  16
  17 class GlobalValue;
  18
  19 namespace SystemZCP {
  20 enum SystemZCPModifier {
  21   TLSGD,
  22   TLSLDM,
  23   DTPOFF,
  24   NTPOFF
  25 };
  26 } // end namespace SystemZCP
  27
  28 /// A SystemZ-specific constant pool value.  At present, the only
  29 /// defined constant pool values are module IDs or offsets of
  30 /// thread-local variables (written x@TLSGD, x@TLSLDM, x@DTPOFF,
  31 /// or x@NTPOFF).
  32 class SystemZConstantPoolValue : public MachineConstantPoolValue {
  33   const GlobalValue *GV;
  34   SystemZCP::SystemZCPModifier Modifier;
  35
  36 protected:
  37   SystemZConstantPoolValue(const GlobalValue *GV,
  38                            SystemZCP::SystemZCPModifier Modifier);
  39
  40 public:
  41   static SystemZConstantPoolValue *
  42     Create(const GlobalValue *GV, SystemZCP::SystemZCPModifier Modifier);
  43
  44   // Override MachineConstantPoolValue.
  45   int getExistingMachineCPValue(MachineConstantPool *CP,
  46                                 unsigned Alignment) override;
  47   void addSelectionDAGCSEId(FoldingSetNodeID &ID) override;
  48   void print(raw_ostream &O) const override;
  49
  50   // Access SystemZ-specific fields.
  51   const GlobalValue *getGlobalValue() const { return GV; }
  52   SystemZCP::SystemZCPModifier getModifier() const { return Modifier; }
  53 };
  54
  55 } // end namespace llvm
  56
  57 #endif