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 bool HasReferenceTypes = false; 51 52 /// What processor and OS we're targeting. 53 Triple TargetTriple; 54 55 WebAssemblyFrameLowering FrameLowering; 56 WebAssemblyInstrInfo InstrInfo; 57 WebAssemblySelectionDAGInfo TSInfo; 58 WebAssemblyTargetLowering TLInfo; 59 60 WebAssemblySubtarget &initializeSubtargetDependencies(StringRef CPU, 61 StringRef FS); 62 63 public: 64 /// This constructor initializes the data members to match that 65 /// of the specified triple. 66 WebAssemblySubtarget(const Triple &TT, const std::string &CPU, 67 const std::string &FS, const TargetMachine &TM); 68 69 const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override { 70 return &TSInfo; 71 } 72 const WebAssemblyFrameLowering *getFrameLowering() const override { 73 return &FrameLowering; 74 } 75 const WebAssemblyTargetLowering *getTargetLowering() const override { 76 return &TLInfo; 77 } 78 const WebAssemblyInstrInfo *getInstrInfo() const override { 79 return &InstrInfo; 80 } 81 const WebAssemblyRegisterInfo *getRegisterInfo() const override { 82 return &getInstrInfo()->getRegisterInfo(); 83 } 84 const Triple &getTargetTriple() const { return TargetTriple; } 85 bool enableAtomicExpand() const override; 86 bool enableIndirectBrExpand() const override { return true; } 87 bool enableMachineScheduler() const override; 88 bool useAA() const override; 89 90 // Predicates used by WebAssemblyInstrInfo.td. 91 bool hasAddr64() const { return TargetTriple.isArch64Bit(); } 92 bool hasSIMD128() const { return SIMDLevel >= SIMD128; } 93 bool hasUnimplementedSIMD128() const { 94 return SIMDLevel >= UnimplementedSIMD128; 95 } 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; } 105 106 /// Parses features string setting specified subtarget options. Definition of 107 /// function is auto generated by tblgen. 108 void ParseSubtargetFeatures(StringRef CPU, StringRef FS); 109 }; 110 111 } // end namespace llvm 112 113 #endif 114