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 
getSelectionDAGInfo()68   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
69     return &TSInfo;
70   }
getFrameLowering()71   const WebAssemblyFrameLowering *getFrameLowering() const override {
72     return &FrameLowering;
73   }
getTargetLowering()74   const WebAssemblyTargetLowering *getTargetLowering() const override {
75     return &TLInfo;
76   }
getInstrInfo()77   const WebAssemblyInstrInfo *getInstrInfo() const override {
78     return &InstrInfo;
79   }
getRegisterInfo()80   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
81     return &getInstrInfo()->getRegisterInfo();
82   }
getTargetTriple()83   const Triple &getTargetTriple() const { return TargetTriple; }
84   bool enableAtomicExpand() const override;
enableIndirectBrExpand()85   bool enableIndirectBrExpand() const override { return true; }
86   bool enableMachineScheduler() const override;
87   bool useAA() const override;
88 
89   // Predicates used by WebAssemblyInstrInfo.td.
hasAddr64()90   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
hasSIMD128()91   bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
hasAtomics()92   bool hasAtomics() const { return HasAtomics; }
hasNontrappingFPToInt()93   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
hasSignExt()94   bool hasSignExt() const { return HasSignExt; }
hasExceptionHandling()95   bool hasExceptionHandling() const { return HasExceptionHandling; }
hasBulkMemory()96   bool hasBulkMemory() const { return HasBulkMemory; }
hasMultivalue()97   bool hasMultivalue() const { return HasMultivalue; }
hasMutableGlobals()98   bool hasMutableGlobals() const { return HasMutableGlobals; }
hasTailCall()99   bool hasTailCall() const { return HasTailCall; }
hasReferenceTypes()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