llvm/lib/Target/WebAssembly/WebAssemblySubtarget.h

   1 //=- WebAssemblySubtarget.h - Define Subtarget for the WebAssembly -*- 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 /// \file
  10 /// This file declares the WebAssembly-specific subclass of
  11 /// TargetSubtarget.
  12 ///
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
  16 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
  17
  18 #include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
  19 #include "WebAssemblyFrameLowering.h"
  20 #include "WebAssemblyISelLowering.h"
  21 #include "WebAssemblyInstrInfo.h"
  22 #include "WebAssemblySelectionDAGInfo.h"
  23 #include "llvm/CodeGen/TargetSubtargetInfo.h"
  24 #include <string>
  25
  26 #define GET_SUBTARGETINFO_HEADER
  27 #include "WebAssemblyGenSubtargetInfo.inc"
  28
  29 namespace llvm {
  30
  31 // Defined in WebAssemblyGenSubtargetInfo.inc.
  32 extern const SubtargetFeatureKV
  33     WebAssemblyFeatureKV[WebAssembly::NumSubtargetFeatures];
  34
  35 class WebAssemblySubtarget final : public WebAssemblyGenSubtargetInfo {
  36   enum SIMDEnum {
  37     NoSIMD,
  38     SIMD128,
  39     RelaxedSIMD,
  40   } SIMDLevel = NoSIMD;
  41
  42   bool HasAtomics = false;
  43   bool HasNontrappingFPToInt = false;
  44   bool HasSignExt = false;
  45   bool HasExceptionHandling = false;
  46   bool HasBulkMemory = false;
  47   bool HasMultivalue = false;
  48   bool HasMutableGlobals = false;
  49   bool HasTailCall = false;
  50   bool HasReferenceTypes = false;
  51   bool HasExtendedConst = false;
  52   bool HasMultiMemory = false;
  53
  54   /// What processor and OS we're targeting.
  55   Triple TargetTriple;
  56
  57   WebAssemblyFrameLowering FrameLowering;
  58   WebAssemblyInstrInfo InstrInfo;
  59   WebAssemblySelectionDAGInfo TSInfo;
  60   WebAssemblyTargetLowering TLInfo;
  61
  62   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef CPU,
  63                                                         StringRef FS);
  64
  65 public:
  66   /// This constructor initializes the data members to match that
  67   /// of the specified triple.
  68   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
  69                        const std::string &FS, const TargetMachine &TM);
  70
  71   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
  72     return &TSInfo;
  73   }
  74   const WebAssemblyFrameLowering *getFrameLowering() const override {
  75     return &FrameLowering;
  76   }
  77   const WebAssemblyTargetLowering *getTargetLowering() const override {
  78     return &TLInfo;
  79   }
  80   const WebAssemblyInstrInfo *getInstrInfo() const override {
  81     return &InstrInfo;
  82   }
  83   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
  84     return &getInstrInfo()->getRegisterInfo();
  85   }
  86   const Triple &getTargetTriple() const { return TargetTriple; }
  87   bool enableAtomicExpand() const override;
  88   bool enableIndirectBrExpand() const override { return true; }
  89   bool enableMachineScheduler() const override;
  90   bool useAA() const override;
  91
  92   // Predicates used by WebAssemblyInstrInfo.td.
  93   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
  94   bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
  95   bool hasRelaxedSIMD() const { return SIMDLevel >= RelaxedSIMD; }
  96   bool hasAtomics() const { return HasAtomics; }
  97   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
  98   bool hasSignExt() const { return HasSignExt; }
  99   bool hasExceptionHandling() const { return HasExceptionHandling; }
 100   bool hasBulkMemory() const { return HasBulkMemory; }
 101   bool hasMultivalue() const { return HasMultivalue; }
 102   bool hasMutableGlobals() const { return HasMutableGlobals; }
 103   bool hasTailCall() const { return HasTailCall; }
 104   bool hasReferenceTypes() const { return HasReferenceTypes; }
 105   bool hasMultiMemory() const { return HasMultiMemory; }
 106
 107   /// Parses features string setting specified subtarget options. Definition of
 108   /// function is auto generated by tblgen.
 109   void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS);
 110 };
 111
 112 } // end namespace llvm
 113
 114 #endif