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_HEADER
  26 #include "WebAssemblyGenSubtargetInfo.inc"
  27
  28 namespace llvm {
  29
  30 class WebAssemblySubtarget final : public WebAssemblyGenSubtargetInfo {
  31   enum SIMDEnum {
  32     NoSIMD,
  33     SIMD128,
  34     UnimplementedSIMD128,
  35   } SIMDLevel = NoSIMD;
  36
  37   bool HasAtomics = false;
  38   bool HasNontrappingFPToInt = false;
  39   bool HasSignExt = false;
  40   bool HasExceptionHandling = false;
  41   bool HasBulkMemory = false;
  42
  43   /// String name of used CPU.
  44   std::string CPUString;
  45
  46   /// What processor and OS we're targeting.
  47   Triple TargetTriple;
  48
  49   WebAssemblyFrameLowering FrameLowering;
  50   WebAssemblyInstrInfo InstrInfo;
  51   WebAssemblySelectionDAGInfo TSInfo;
  52   WebAssemblyTargetLowering TLInfo;
  53
  54   /// Initializes using CPUString and the passed in feature string so that we
  55   /// can use initializer lists for subtarget initialization.
  56   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
  57
  58 public:
  59   /// This constructor initializes the data members to match that
  60   /// of the specified triple.
  61   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
  62                        const std::string &FS, const TargetMachine &TM);
  63
  64   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
  65     return &TSInfo;
  66   }
  67   const WebAssemblyFrameLowering *getFrameLowering() const override {
  68     return &FrameLowering;
  69   }
  70   const WebAssemblyTargetLowering *getTargetLowering() const override {
  71     return &TLInfo;
  72   }
  73   const WebAssemblyInstrInfo *getInstrInfo() const override {
  74     return &InstrInfo;
  75   }
  76   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
  77     return &getInstrInfo()->getRegisterInfo();
  78   }
  79   const Triple &getTargetTriple() const { return TargetTriple; }
  80   bool enableMachineScheduler() const override;
  81   bool useAA() const override;
  82
  83   // Predicates used by WebAssemblyInstrInfo.td.
  84   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
  85   bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
  86   bool hasUnimplementedSIMD128() const {
  87     return SIMDLevel >= UnimplementedSIMD128;
  88   }
  89   bool hasAtomics() const { return HasAtomics; }
  90   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
  91   bool hasSignExt() const { return HasSignExt; }
  92   bool hasExceptionHandling() const { return HasExceptionHandling; }
  93   bool hasBulkMemory() const { return HasBulkMemory; }
  94
  95   /// Parses features string setting specified subtarget options. Definition of
  96   /// function is auto generated by tblgen.
  97   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
  98 };
  99
 100 } // end namespace llvm
 101
 102 #endif