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 "WebAssemblyFrameLowering.h"
  19 #include "WebAssemblyISelLowering.h"
  20 #include "WebAssemblyInstrInfo.h"
  21 #include "WebAssemblySelectionDAGInfo.h"
  22 #include "llvm/CodeGen/TargetSubtargetInfo.h"
  23 #include <string>
  24
  25 #define GET_SUBTARGETINFO_ENUM
  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     UnimplementedSIMD128,
  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
  51   /// String name of used CPU.
  52   std::string CPUString;
  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   /// Initializes using CPUString and the passed in feature string so that we
  63   /// can use initializer lists for subtarget initialization.
  64   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
  65
  66 public:
  67   /// This constructor initializes the data members to match that
  68   /// of the specified triple.
  69   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
  70                        const std::string &FS, const TargetMachine &TM);
  71
  72   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
  73     return &TSInfo;
  74   }
  75   const WebAssemblyFrameLowering *getFrameLowering() const override {
  76     return &FrameLowering;
  77   }
  78   const WebAssemblyTargetLowering *getTargetLowering() const override {
  79     return &TLInfo;
  80   }
  81   const WebAssemblyInstrInfo *getInstrInfo() const override {
  82     return &InstrInfo;
  83   }
  84   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
  85     return &getInstrInfo()->getRegisterInfo();
  86   }
  87   const Triple &getTargetTriple() const { return TargetTriple; }
  88   bool enableAtomicExpand() const override;
  89   bool enableIndirectBrExpand() const override { return true; }
  90   bool enableMachineScheduler() const override;
  91   bool useAA() const override;
  92
  93   // Predicates used by WebAssemblyInstrInfo.td.
  94   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
  95   bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
  96   bool hasUnimplementedSIMD128() const {
  97     return SIMDLevel >= UnimplementedSIMD128;
  98   }
  99   bool hasAtomics() const { return HasAtomics; }
 100   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
 101   bool hasSignExt() const { return HasSignExt; }
 102   bool hasExceptionHandling() const { return HasExceptionHandling; }
 103   bool hasBulkMemory() const { return HasBulkMemory; }
 104   bool hasMultivalue() const { return HasMultivalue; }
 105   bool hasMutableGlobals() const { return HasMutableGlobals; }
 106   bool hasTailCall() const { return HasTailCall; }
 107
 108   /// Parses features string setting specified subtarget options. Definition of
 109   /// function is auto generated by tblgen.
 110   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
 111 };
 112
 113 } // end namespace llvm
 114
 115 #endif