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 } SIMDLevel = NoSIMD; 40 41 bool HasAtomics = false; 42 bool HasNontrappingFPToInt = false; 43 bool HasSignExt = false; 44 bool HasExceptionHandling = false; 45 bool HasBulkMemory = false; 46 bool HasMultivalue = false; 47 bool HasMutableGlobals = false; 48 bool HasTailCall = false; 49 bool HasReferenceTypes = false; 50 51 /// What processor and OS we're targeting. 52 Triple TargetTriple; 53 54 WebAssemblyFrameLowering FrameLowering; 55 WebAssemblyInstrInfo InstrInfo; 56 WebAssemblySelectionDAGInfo TSInfo; 57 WebAssemblyTargetLowering TLInfo; 58 59 WebAssemblySubtarget &initializeSubtargetDependencies(StringRef CPU, 60 StringRef FS); 61 62 public: 63 /// This constructor initializes the data members to match that 64 /// of the specified triple. 65 WebAssemblySubtarget(const Triple &TT, const std::string &CPU, 66 const std::string &FS, const TargetMachine &TM); 67 68 const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override { 69 return &TSInfo; 70 } 71 const WebAssemblyFrameLowering *getFrameLowering() const override { 72 return &FrameLowering; 73 } 74 const WebAssemblyTargetLowering *getTargetLowering() const override { 75 return &TLInfo; 76 } 77 const WebAssemblyInstrInfo *getInstrInfo() const override { 78 return &InstrInfo; 79 } 80 const WebAssemblyRegisterInfo *getRegisterInfo() const override { 81 return &getInstrInfo()->getRegisterInfo(); 82 } 83 const Triple &getTargetTriple() const { return TargetTriple; } 84 bool enableAtomicExpand() const override; 85 bool enableIndirectBrExpand() const override { return true; } 86 bool enableMachineScheduler() const override; 87 bool useAA() const override; 88 89 // Predicates used by WebAssemblyInstrInfo.td. 90 bool hasAddr64() const { return TargetTriple.isArch64Bit(); } 91 bool hasSIMD128() const { return SIMDLevel >= SIMD128; } 92 bool hasAtomics() const { return HasAtomics; } 93 bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; } 94 bool hasSignExt() const { return HasSignExt; } 95 bool hasExceptionHandling() const { return HasExceptionHandling; } 96 bool hasBulkMemory() const { return HasBulkMemory; } 97 bool hasMultivalue() const { return HasMultivalue; } 98 bool hasMutableGlobals() const { return HasMutableGlobals; } 99 bool hasTailCall() const { return HasTailCall; } 100 bool hasReferenceTypes() const { return HasReferenceTypes; } 101 102 /// Parses features string setting specified subtarget options. Definition of 103 /// function is auto generated by tblgen. 104 void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); 105 }; 106 107 } // end namespace llvm 108 109 #endif 110