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
29namespace llvm {
30
31// Defined in WebAssemblyGenSubtargetInfo.inc.
32extern const SubtargetFeatureKV
33    WebAssemblyFeatureKV[WebAssembly::NumSubtargetFeatures];
34
35class 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
62public:
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
68  const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
69    return &TSInfo;
70  }
71  const WebAssemblyFrameLowering *getFrameLowering() const override {
72    return &FrameLowering;
73  }
74  const WebAssemblyTargetLowering *getTargetLowering() const override {
75    return &TLInfo;
76  }
77  const WebAssemblyInstrInfo *getInstrInfo() const override {
78    return &InstrInfo;
79  }
80  const WebAssemblyRegisterInfo *getRegisterInfo() const override {
81    return &getInstrInfo()->getRegisterInfo();
82  }
83  const Triple &getTargetTriple() const { return TargetTriple; }
84  bool enableAtomicExpand() const override;
85  bool enableIndirectBrExpand() const override { return true; }
86  bool enableMachineScheduler() const override;
87  bool useAA() const override;
88
89  // Predicates used by WebAssemblyInstrInfo.td.
90  bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
91  bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
92  bool hasAtomics() const { return HasAtomics; }
93  bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
94  bool hasSignExt() const { return HasSignExt; }
95  bool hasExceptionHandling() const { return HasExceptionHandling; }
96  bool hasBulkMemory() const { return HasBulkMemory; }
97  bool hasMultivalue() const { return HasMultivalue; }
98  bool hasMutableGlobals() const { return HasMutableGlobals; }
99  bool hasTailCall() const { return HasTailCall; }
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