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      1 //===-- SystemZSubtarget.h - SystemZ subtarget information -----*- 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 declares the SystemZ specific subclass of TargetSubtargetInfo.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
     15 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZSUBTARGET_H
     16 
     17 #include "SystemZFrameLowering.h"
     18 #include "SystemZISelLowering.h"
     19 #include "SystemZInstrInfo.h"
     20 #include "SystemZRegisterInfo.h"
     21 #include "SystemZSelectionDAGInfo.h"
     22 #include "llvm/IR/DataLayout.h"
     23 #include "llvm/ADT/Triple.h"
     24 #include "llvm/Target/TargetSubtargetInfo.h"
     25 #include <string>
     26 
     27 #define GET_SUBTARGETINFO_HEADER
     28 #include "SystemZGenSubtargetInfo.inc"
     29 
     30 namespace llvm {
     31 class GlobalValue;
     32 class StringRef;
     33 
     34 class SystemZSubtarget : public SystemZGenSubtargetInfo {
     35   virtual void anchor();
     36 protected:
     37   bool HasDistinctOps;
     38   bool HasLoadStoreOnCond;
     39   bool HasHighWord;
     40   bool HasFPExtension;
     41   bool HasPopulationCount;
     42   bool HasFastSerialization;
     43   bool HasInterlockedAccess1;
     44   bool HasMiscellaneousExtensions;
     45   bool HasTransactionalExecution;
     46   bool HasProcessorAssist;
     47   bool HasVector;
     48   bool HasLoadStoreOnCond2;
     49 
     50 private:
     51   Triple TargetTriple;
     52   SystemZInstrInfo InstrInfo;
     53   SystemZTargetLowering TLInfo;
     54   SystemZSelectionDAGInfo TSInfo;
     55   SystemZFrameLowering FrameLowering;
     56 
     57   SystemZSubtarget &initializeSubtargetDependencies(StringRef CPU,
     58                                                     StringRef FS);
     59 public:
     60   SystemZSubtarget(const Triple &TT, const std::string &CPU,
     61                    const std::string &FS, const TargetMachine &TM);
     62 
     63   const TargetFrameLowering *getFrameLowering() const override {
     64     return &FrameLowering;
     65   }
     66   const SystemZInstrInfo *getInstrInfo() const override { return &InstrInfo; }
     67   const SystemZRegisterInfo *getRegisterInfo() const override {
     68     return &InstrInfo.getRegisterInfo();
     69   }
     70   const SystemZTargetLowering *getTargetLowering() const override {
     71     return &TLInfo;
     72   }
     73   const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
     74     return &TSInfo;
     75   }
     76 
     77   // This is important for reducing register pressure in vector code.
     78   bool useAA() const override { return true; }
     79 
     80   // Automatically generated by tblgen.
     81   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
     82 
     83   // Return true if the target has the distinct-operands facility.
     84   bool hasDistinctOps() const { return HasDistinctOps; }
     85 
     86   // Return true if the target has the load/store-on-condition facility.
     87   bool hasLoadStoreOnCond() const { return HasLoadStoreOnCond; }
     88 
     89   // Return true if the target has the load/store-on-condition facility 2.
     90   bool hasLoadStoreOnCond2() const { return HasLoadStoreOnCond2; }
     91 
     92   // Return true if the target has the high-word facility.
     93   bool hasHighWord() const { return HasHighWord; }
     94 
     95   // Return true if the target has the floating-point extension facility.
     96   bool hasFPExtension() const { return HasFPExtension; }
     97 
     98   // Return true if the target has the population-count facility.
     99   bool hasPopulationCount() const { return HasPopulationCount; }
    100 
    101   // Return true if the target has the fast-serialization facility.
    102   bool hasFastSerialization() const { return HasFastSerialization; }
    103 
    104   // Return true if the target has interlocked-access facility 1.
    105   bool hasInterlockedAccess1() const { return HasInterlockedAccess1; }
    106 
    107   // Return true if the target has the miscellaneous-extensions facility.
    108   bool hasMiscellaneousExtensions() const {
    109     return HasMiscellaneousExtensions;
    110   }
    111 
    112   // Return true if the target has the transactional-execution facility.
    113   bool hasTransactionalExecution() const { return HasTransactionalExecution; }
    114 
    115   // Return true if the target has the processor-assist facility.
    116   bool hasProcessorAssist() const { return HasProcessorAssist; }
    117 
    118   // Return true if the target has the vector facility.
    119   bool hasVector() const { return HasVector; }
    120 
    121   // Return true if GV can be accessed using LARL for reloc model RM
    122   // and code model CM.
    123   bool isPC32DBLSymbol(const GlobalValue *GV, CodeModel::Model CM) const;
    124 
    125   bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
    126 };
    127 } // end namespace llvm
    128 
    129 #endif
    130