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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 
     49 private:
     50   Triple TargetTriple;
     51   SystemZInstrInfo InstrInfo;
     52   SystemZTargetLowering TLInfo;
     53   SystemZSelectionDAGInfo TSInfo;
     54   SystemZFrameLowering FrameLowering;
     55 
     56   SystemZSubtarget &initializeSubtargetDependencies(StringRef CPU,
     57                                                     StringRef FS);
     58 public:
     59   SystemZSubtarget(const Triple &TT, const std::string &CPU,
     60                    const std::string &FS, const TargetMachine &TM);
     61 
     62   const TargetFrameLowering *getFrameLowering() const override {
     63     return &FrameLowering;
     64   }
     65   const SystemZInstrInfo *getInstrInfo() const override { return &InstrInfo; }
     66   const SystemZRegisterInfo *getRegisterInfo() const override {
     67     return &InstrInfo.getRegisterInfo();
     68   }
     69   const SystemZTargetLowering *getTargetLowering() const override {
     70     return &TLInfo;
     71   }
     72   const TargetSelectionDAGInfo *getSelectionDAGInfo() const override {
     73     return &TSInfo;
     74   }
     75 
     76   // This is important for reducing register pressure in vector code.
     77   bool useAA() const override { return true; }
     78 
     79   // Automatically generated by tblgen.
     80   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
     81 
     82   // Return true if the target has the distinct-operands facility.
     83   bool hasDistinctOps() const { return HasDistinctOps; }
     84 
     85   // Return true if the target has the load/store-on-condition facility.
     86   bool hasLoadStoreOnCond() const { return HasLoadStoreOnCond; }
     87 
     88   // Return true if the target has the high-word facility.
     89   bool hasHighWord() const { return HasHighWord; }
     90 
     91   // Return true if the target has the floating-point extension facility.
     92   bool hasFPExtension() const { return HasFPExtension; }
     93 
     94   // Return true if the target has the population-count facility.
     95   bool hasPopulationCount() const { return HasPopulationCount; }
     96 
     97   // Return true if the target has the fast-serialization facility.
     98   bool hasFastSerialization() const { return HasFastSerialization; }
     99 
    100   // Return true if the target has interlocked-access facility 1.
    101   bool hasInterlockedAccess1() const { return HasInterlockedAccess1; }
    102 
    103   // Return true if the target has the miscellaneous-extensions facility.
    104   bool hasMiscellaneousExtensions() const {
    105     return HasMiscellaneousExtensions;
    106   }
    107 
    108   // Return true if the target has the transactional-execution facility.
    109   bool hasTransactionalExecution() const { return HasTransactionalExecution; }
    110 
    111   // Return true if the target has the processor-assist facility.
    112   bool hasProcessorAssist() const { return HasProcessorAssist; }
    113 
    114   // Return true if the target has the vector facility.
    115   bool hasVector() const { return HasVector; }
    116 
    117   // Return true if GV can be accessed using LARL for reloc model RM
    118   // and code model CM.
    119   bool isPC32DBLSymbol(const GlobalValue *GV, Reloc::Model RM,
    120                        CodeModel::Model CM) const;
    121 
    122   bool isTargetELF() const { return TargetTriple.isOSBinFormatELF(); }
    123 };
    124 } // end namespace llvm
    125 
    126 #endif
    127