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      1 //=- WebAssemblySubtarget.h - Define Subtarget for the WebAssembly -*- 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 /// \file
     11 /// \brief This file declares the WebAssembly-specific subclass of
     12 /// TargetSubtarget.
     13 ///
     14 //===----------------------------------------------------------------------===//
     15 
     16 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
     17 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
     18 
     19 #include "WebAssemblyFrameLowering.h"
     20 #include "WebAssemblyISelLowering.h"
     21 #include "WebAssemblyInstrInfo.h"
     22 #include "WebAssemblySelectionDAGInfo.h"
     23 #include "llvm/Target/TargetSubtargetInfo.h"
     24 #include <string>
     25 
     26 #define GET_SUBTARGETINFO_HEADER
     27 #include "WebAssemblyGenSubtargetInfo.inc"
     28 
     29 namespace llvm {
     30 
     31 class WebAssemblySubtarget final : public WebAssemblyGenSubtargetInfo {
     32   bool HasSIMD128;
     33 
     34   /// String name of used CPU.
     35   std::string CPUString;
     36 
     37   /// What processor and OS we're targeting.
     38   Triple TargetTriple;
     39 
     40   WebAssemblyFrameLowering FrameLowering;
     41   WebAssemblyInstrInfo InstrInfo;
     42   WebAssemblySelectionDAGInfo TSInfo;
     43   WebAssemblyTargetLowering TLInfo;
     44 
     45   /// Initializes using CPUString and the passed in feature string so that we
     46   /// can use initializer lists for subtarget initialization.
     47   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
     48 
     49 public:
     50   /// This constructor initializes the data members to match that
     51   /// of the specified triple.
     52   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
     53                        const std::string &FS, const TargetMachine &TM);
     54 
     55   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
     56     return &TSInfo;
     57   }
     58   const WebAssemblyFrameLowering *getFrameLowering() const override {
     59     return &FrameLowering;
     60   }
     61   const WebAssemblyTargetLowering *getTargetLowering() const override {
     62     return &TLInfo;
     63   }
     64   const WebAssemblyInstrInfo *getInstrInfo() const override {
     65     return &InstrInfo;
     66   }
     67   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
     68     return &getInstrInfo()->getRegisterInfo();
     69   }
     70   const Triple &getTargetTriple() const { return TargetTriple; }
     71   bool enableMachineScheduler() const override;
     72   bool useAA() const override;
     73 
     74   // Predicates used by WebAssemblyInstrInfo.td.
     75   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
     76   bool hasSIMD128() const { return HasSIMD128; }
     77 
     78   /// Parses features string setting specified subtarget options. Definition of
     79   /// function is auto generated by tblgen.
     80   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
     81 };
     82 
     83 } // end namespace llvm
     84 
     85 #endif
     86