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      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                                 Align 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
     58