LLVM  9.0.0svn
WebAssemblySubtarget.h
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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 
20 #include "WebAssemblyInstrInfo.h"
23 #include <string>
24 
25 #define GET_SUBTARGETINFO_ENUM
26 #define GET_SUBTARGETINFO_HEADER
27 #include "WebAssemblyGenSubtargetInfo.inc"
28 
29 namespace llvm {
30 
31 // Defined in WebAssemblyGenSubtargetInfo.inc.
32 extern const SubtargetFeatureKV
33  WebAssemblyFeatureKV[WebAssembly::NumSubtargetFeatures];
34 
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;
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 
66 public:
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 
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 enableMachineScheduler() const override;
90  bool useAA() const override;
91 
92  // Predicates used by WebAssemblyInstrInfo.td.
93  bool hasAddr64() const { return TargetTriple.isArch64Bit(); }
94  bool hasSIMD128() const { return SIMDLevel >= SIMD128; }
95  bool hasUnimplementedSIMD128() const {
96  return SIMDLevel >= UnimplementedSIMD128;
97  }
98  bool hasAtomics() const { return HasAtomics; }
99  bool hasNontrappingFPToInt() const { return HasNontrappingFPToInt; }
100  bool hasSignExt() const { return HasSignExt; }
101  bool hasExceptionHandling() const { return HasExceptionHandling; }
102  bool hasBulkMemory() const { return HasBulkMemory; }
103  bool hasMultivalue() const { return HasMultivalue; }
104  bool hasMutableGlobals() const { return HasMutableGlobals; }
105  bool hasTailCall() const { return HasTailCall; }
106 
107  /// Parses features string setting specified subtarget options. Definition of
108  /// function is auto generated by tblgen.
110 };
111 
112 } // end namespace llvm
113 
114 #endif
This file defines the interfaces that WebAssembly uses to lower LLVM code into a selection DAG...
bool enableMachineScheduler() const override
This class represents lattice values for constants.
Definition: AllocatorList.h:23
const WebAssemblyRegisterInfo & getRegisterInfo() const
const WebAssemblyFrameLowering * getFrameLowering() const override
const SubtargetFeatureKV WebAssemblyFeatureKV[WebAssembly::NumSubtargetFeatures]
void ParseSubtargetFeatures(StringRef CPU, StringRef FS)
Parses features string setting specified subtarget options.
const Triple & getTargetTriple() const
const WebAssemblySelectionDAGInfo * getSelectionDAGInfo() const override
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
const WebAssemblyTargetLowering * getTargetLowering() const override
This file contains the WebAssembly implementation of the TargetInstrInfo class.
This file defines the WebAssembly subclass for SelectionDAGTargetInfo.
const WebAssemblyRegisterInfo * getRegisterInfo() const override
This class implements WebAssembly-specific bits of TargetFrameLowering class.
bool isArch64Bit() const
Test whether the architecture is 64-bit.
Definition: Triple.cpp:1288
WebAssemblySubtarget(const Triple &TT, const std::string &CPU, const std::string &FS, const TargetMachine &TM)
This constructor initializes the data members to match that of the specified triple.
bool enableAtomicExpand() const override
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:65
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:48
const WebAssemblyInstrInfo * getInstrInfo() const override