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/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 
36   /// String name of used CPU.
37   std::string CPUString;
38 
39   /// What processor and OS we're targeting.
40   Triple TargetTriple;
41 
42   WebAssemblyFrameLowering FrameLowering;
43   WebAssemblyInstrInfo InstrInfo;
44   WebAssemblySelectionDAGInfo TSInfo;
45   WebAssemblyTargetLowering TLInfo;
46 
47   /// Initializes using CPUString and the passed in feature string so that we
48   /// can use initializer lists for subtarget initialization.
49   WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
50 
51 public:
52   /// This constructor initializes the data members to match that
53   /// of the specified triple.
54   WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
55                        const std::string &FS, const TargetMachine &TM);
56 
57   const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
58     return &TSInfo;
59   }
60   const WebAssemblyFrameLowering *getFrameLowering() const override {
61     return &FrameLowering;
62   }
63   const WebAssemblyTargetLowering *getTargetLowering() const override {
64     return &TLInfo;
65   }
66   const WebAssemblyInstrInfo *getInstrInfo() const override {
67     return &InstrInfo;
68   }
69   const WebAssemblyRegisterInfo *getRegisterInfo() const override {
70     return &getInstrInfo()->getRegisterInfo();
71   }
72   const Triple &getTargetTriple() const { return TargetTriple; }
73   bool enableMachineScheduler() const override;
74   bool useAA() const override;
75 
76   // Predicates used by WebAssemblyInstrInfo.td.
77   bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
78   bool hasSIMD128() const { return HasSIMD128; }
79   bool hasAtomics() const { return HasAtomics; }
80   bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
81 
82   /// Parses features string setting specified subtarget options. Definition of
83   /// function is auto generated by tblgen.
84   void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
85 };
86 
87 } // end namespace llvm
88 
89 #endif
90