HexagonSubtarget.h revision 288943 
1//===-- HexagonSubtarget.h - Define Subtarget for the Hexagon ---*- 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// This file declares the Hexagon specific subclass of TargetSubtarget.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_LIB_TARGET_HEXAGON_HEXAGONSUBTARGET_H
15#define LLVM_LIB_TARGET_HEXAGON_HEXAGONSUBTARGET_H
16
17#include "HexagonFrameLowering.h"
18#include "HexagonISelLowering.h"
19#include "HexagonInstrInfo.h"
20#include "HexagonSelectionDAGInfo.h"
21#include "llvm/IR/DataLayout.h"
22#include "llvm/Target/TargetMachine.h"
23#include "llvm/Target/TargetSubtargetInfo.h"
24#include <string>
25
26#define GET_SUBTARGETINFO_HEADER
27#include "HexagonGenSubtargetInfo.inc"
28
29#define Hexagon_SMALL_DATA_THRESHOLD 8
30#define Hexagon_SLOTS 4
31
32namespace llvm {
33
34class HexagonSubtarget : public HexagonGenSubtargetInfo {
35  virtual void anchor();
36
37  bool UseMemOps;
38  bool ModeIEEERndNear;
39
40public:
41  enum HexagonArchEnum {
42    V4, V5
43  };
44
45  HexagonArchEnum HexagonArchVersion;
46private:
47  std::string CPUString;
48  HexagonInstrInfo InstrInfo;
49  HexagonTargetLowering TLInfo;
50  HexagonSelectionDAGInfo TSInfo;
51  HexagonFrameLowering FrameLowering;
52  InstrItineraryData InstrItins;
53
54public:
55  HexagonSubtarget(const Triple &TT, StringRef CPU, StringRef FS,
56                   const TargetMachine &TM);
57
58  /// getInstrItins - Return the instruction itineraries based on subtarget
59  /// selection.
60  const InstrItineraryData *getInstrItineraryData() const override {
61    return &InstrItins;
62  }
63  const HexagonInstrInfo *getInstrInfo() const override { return &InstrInfo; }
64  const HexagonRegisterInfo *getRegisterInfo() const override {
65    return &InstrInfo.getRegisterInfo();
66  }
67  const HexagonTargetLowering *getTargetLowering() const override {
68    return &TLInfo;
69  }
70  const HexagonFrameLowering *getFrameLowering() const override {
71    return &FrameLowering;
72  }
73  const HexagonSelectionDAGInfo *getSelectionDAGInfo() const override {
74    return &TSInfo;
75  }
76
77  HexagonSubtarget &initializeSubtargetDependencies(StringRef CPU,
78                                                    StringRef FS);
79
80  /// ParseSubtargetFeatures - Parses features string setting specified
81  /// subtarget options.  Definition of function is auto generated by tblgen.
82  void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
83
84  bool useMemOps() const { return UseMemOps; }
85  bool hasV5TOps() const { return getHexagonArchVersion() >= V5; }
86  bool hasV5TOpsOnly() const { return getHexagonArchVersion() == V5; }
87  bool modeIEEERndNear() const { return ModeIEEERndNear; }
88  bool enableMachineScheduler() const override;
89  // Always use the TargetLowering default scheduler.
90  // FIXME: This will use the vliw scheduler which is probably just hurting
91  // compiler time and will be removed eventually anyway.
92  bool enableMachineSchedDefaultSched() const override { return false; }
93
94  const std::string &getCPUString () const { return CPUString; }
95
96  // Threshold for small data section
97  unsigned getSmallDataThreshold() const {
98    return Hexagon_SMALL_DATA_THRESHOLD;
99  }
100  const HexagonArchEnum &getHexagonArchVersion() const {
101    return  HexagonArchVersion;
102  }
103};
104
105} // end namespace llvm
106
107#endif
108