1 //=- WebAssemblySubtarget.h - Define Subtarget for the WebAssembly -*- C++ -*-//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// This file declares the WebAssembly-specific subclass of
12 /// TargetSubtarget.
13 ///
14 //===----------------------------------------------------------------------===//
15 
16 #ifndef LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
17 #define LLVM_LIB_TARGET_WEBASSEMBLY_WEBASSEMBLYSUBTARGET_H
18 
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 class WebAssemblySubtarget final : public WebAssemblyGenSubtargetInfo {
32   bool HasSIMD128;
33   bool HasAtomics;
34   bool HasNontrappingFPToInt;
35   bool HasSignExt;
36   bool HasExceptionHandling;
37 
38   /// String name of used CPU.
39   std::string CPUString;
40 
41   /// What processor and OS we're targeting.
42   Triple TargetTriple;
43 
44   WebAssemblyFrameLowering FrameLowering;
45   WebAssemblyInstrInfo InstrInfo;
46   WebAssemblySelectionDAGInfo TSInfo;
47   WebAssemblyTargetLowering TLInfo;
48 
49   /// Initializes using CPUString and the passed in feature string so that we
50   /// can use initializer lists for subtarget initialization.
51   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
52 
53 public:
54   /// This constructor initializes the data members to match that
55   /// of the specified triple.
56   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
57                        const std::string &FS, const TargetMachine &TM);
58 
59   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
60     return &TSInfo;
61   }
62   const WebAssemblyFrameLowering *getFrameLowering() const override {
63     return &FrameLowering;
64   }
65   const WebAssemblyTargetLowering *getTargetLowering() const override {
66     return &TLInfo;
67   }
68   const WebAssemblyInstrInfo *getInstrInfo() const override {
69     return &InstrInfo;
70   }
71   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
72     return &getInstrInfo()->getRegisterInfo();
73   }
74   const Triple &getTargetTriple() const { return TargetTriple; }
75   bool enableMachineScheduler() const override;
76   bool useAA() const override;
77 
78   // Predicates used by WebAssemblyInstrInfo.td.
79   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
80   bool hasSIMD128() const { return HasSIMD128; }
81   bool hasAtomics() const { return HasAtomics; }
82   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
83   bool hasSignExt() const { return HasSignExt; }
84   bool hasExceptionHandling() const { return HasExceptionHandling; }
85 
86   /// Parses features string setting specified subtarget options. Definition of
87   /// function is auto generated by tblgen.
88   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
89 };
90 
91 } // end namespace llvm
92 
93 #endif
94