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    UnimplementedSIMD128,
40  } SIMDLevel = NoSIMD;
41
42  bool HasAtomics = false;
43  bool HasNontrappingFPToInt = false;
44  bool HasSignExt = false;
45  bool HasExceptionHandling = false;
46  bool HasBulkMemory = false;
47  bool HasMultivalue = false;
48  bool HasMutableGlobals = false;
49  bool HasTailCall = false;
50
51  /// String name of used CPU.
52  std::string CPUString;
53
54  /// What processor and OS we're targeting.
55  Triple TargetTriple;
56
57  WebAssemblyFrameLowering FrameLowering;
58  WebAssemblyInstrInfo InstrInfo;
59  WebAssemblySelectionDAGInfo TSInfo;
60  WebAssemblyTargetLowering TLInfo;
61
62  /// Initializes using CPUString and the passed in feature string so that we
63  /// can use initializer lists for subtarget initialization.
64  WebAssemblySubtarget &initializeSubtargetDependencies(StringRef FS);
65
66public:
67  /// This constructor initializes the data members to match that
68  /// of the specified triple.
69  WebAssemblySubtarget(const Triple &TT, const std::string &CPU,
70                       const std::string &FS, const TargetMachine &TM);
71
72  const WebAssemblySelectionDAGInfo *getSelectionDAGInfo() const override {
73    return &TSInfo;
74  }
75  const WebAssemblyFrameLowering *getFrameLowering() const override {
76    return &FrameLowering;
77  }
78  const WebAssemblyTargetLowering *getTargetLowering() const override {
79    return &TLInfo;
80  }
81  const WebAssemblyInstrInfo *getInstrInfo() const override {
82    return &InstrInfo;
83  }
84  const WebAssemblyRegisterInfo *getRegisterInfo() const override {
85    return &getInstrInfo()->getRegisterInfo();
86  }
87  const Triple &getTargetTriple() const { return TargetTriple; }
88  bool enableAtomicExpand() const override;
89  bool enableIndirectBrExpand() const override { return true; }
90  bool enableMachineScheduler() const override;
91  bool useAA() const override;
92
93  // Predicates used by WebAssemblyInstrInfo.td.
94  bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
95  bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
96  bool hasUnimplementedSIMD128() const {
97    return SIMDLevel >= UnimplementedSIMD128;
98  }
99  bool hasAtomics() const { return HasAtomics; }
100  bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
101  bool hasSignExt() const { return HasSignExt; }
102  bool hasExceptionHandling() const { return HasExceptionHandling; }
103  bool hasBulkMemory() const { return HasBulkMemory; }
104  bool hasMultivalue() const { return HasMultivalue; }
105  bool hasMutableGlobals() const { return HasMutableGlobals; }
106  bool hasTailCall() const { return HasTailCall; }
107
108  /// Parses features string setting specified subtarget options. Definition of
109  /// function is auto generated by tblgen.
110  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
111};
112
113} // end namespace llvm
114
115#endif
116