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 /// \brief 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/Target/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 
35   /// String name of used CPU.
36   std::string CPUString;
37 
38   /// What processor and OS we're targeting.
39   Triple TargetTriple;
40 
41   WebAssemblyFrameLowering FrameLowering;
42   WebAssemblyInstrInfo InstrInfo;
43   WebAssemblySelectionDAGInfo TSInfo;
44   WebAssemblyTargetLowering TLInfo;
45 
46   /// Initializes using CPUString and the passed in feature string so that we
47   /// can use initializer lists for subtarget initialization.
48   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
49 
50 public:
51   /// This constructor initializes the data members to match that
52   /// of the specified triple.
53   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
54                        const std::string &FS, const TargetMachine &TM);
55 
56   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
57     return &TSInfo;
58   }
59   const WebAssemblyFrameLowering *getFrameLowering() const override {
60     return &FrameLowering;
61   }
62   const WebAssemblyTargetLowering *getTargetLowering() const override {
63     return &TLInfo;
64   }
65   const WebAssemblyInstrInfo *getInstrInfo() const override {
66     return &InstrInfo;
67   }
68   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
69     return &getInstrInfo()->getRegisterInfo();
70   }
71   const Triple &getTargetTriple() const { return TargetTriple; }
72   bool enableMachineScheduler() const override;
73   bool useAA() const override;
74 
75   // Predicates used by WebAssemblyInstrInfo.td.
76   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
77   bool hasSIMD128() const { return HasSIMD128; }
78   bool hasAtomics() const { return HasAtomics; }
79 
80   /// Parses features string setting specified subtarget options. Definition of
81   /// function is auto generated by tblgen.
82   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
83 };
84 
85 } // end namespace llvm
86 
87 #endif
88