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 HasBulkMemory = false; 44 bool HasBulkMemoryOpt = false; 45 bool HasCallIndirectOverlong = false; 46 bool HasExceptionHandling = false; 47 bool HasExtendedConst = false; 48 bool HasFP16 = false; 49 bool HasMultiMemory = false; 50 bool HasMultivalue = false; 51 bool HasMutableGlobals = false; 52 bool HasNontrappingFPToInt = false; 53 bool HasReferenceTypes = false; 54 bool HasSignExt = false; 55 bool HasTailCall = false; 56 bool HasWideArithmetic = false; 57 58 /// What processor and OS we're targeting. 59 Triple TargetTriple; 60 61 WebAssemblyFrameLowering FrameLowering; 62 WebAssemblyInstrInfo InstrInfo; 63 WebAssemblySelectionDAGInfo TSInfo; 64 WebAssemblyTargetLowering TLInfo; 65 66 WebAssemblySubtarget &initializeSubtargetDependencies(StringRef CPU, 67 StringRef FS); 68 69 public: 70 /// This constructor initializes the data members to match that 71 /// of the specified triple. 72 WebAssemblySubtarget(const Triple &TT, const std::string &CPU, 73 const std::string &FS, const TargetMachine &TM); 74 75 const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override { 76 return &TSInfo; 77 } 78 const WebAssemblyFrameLowering *getFrameLowering() const override { 79 return &FrameLowering; 80 } 81 const WebAssemblyTargetLowering *getTargetLowering() const override { 82 return &TLInfo; 83 } 84 const WebAssemblyInstrInfo *getInstrInfo() const override { 85 return &InstrInfo; 86 } 87 const WebAssemblyRegisterInfo *getRegisterInfo() const override { 88 return &getInstrInfo()->getRegisterInfo(); 89 } 90 const Triple &getTargetTriple() const { return TargetTriple; } 91 bool enableAtomicExpand() const override; 92 bool enableIndirectBrExpand() const override { return true; } 93 bool enableMachineScheduler() const override; 94 bool useAA() const override; 95 96 // Predicates used by WebAssemblyInstrInfo.td. 97 bool hasAddr64() const { return TargetTriple.isArch64Bit(); } 98 bool hasAtomics() const { return HasAtomics; } 99 bool hasBulkMemory() const { return HasBulkMemory; } 100 bool hasBulkMemoryOpt() const { return HasBulkMemoryOpt; } 101 bool hasCallIndirectOverlong() const { return HasCallIndirectOverlong; } 102 bool hasExceptionHandling() const { return HasExceptionHandling; } 103 bool hasExtendedConst() const { return HasExtendedConst; } 104 bool hasFP16() const { return HasFP16; } 105 bool hasMultiMemory() const { return HasMultiMemory; } 106 bool hasMultivalue() const { return HasMultivalue; } 107 bool hasMutableGlobals() const { return HasMutableGlobals; } 108 bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; } 109 bool hasReferenceTypes() const { return HasReferenceTypes; } 110 bool hasRelaxedSIMD() const { return SIMDLevel >= RelaxedSIMD; } 111 bool hasSignExt() const { return HasSignExt; } 112 bool hasSIMD128() const { return SIMDLevel >= SIMD128; } 113 bool hasTailCall() const { return HasTailCall; } 114 bool hasWideArithmetic() const { return HasWideArithmetic; } 115 116 /// Parses features string setting specified subtarget options. Definition of 117 /// function is auto generated by tblgen. 118 void ParseSubtargetFeatures(StringRef CPU, StringRef TuneCPU, StringRef FS); 119 }; 120 121 } // end namespace llvm 122 123 #endif 124