LLVM  9.0.0svn
HexagonMCChecker.h
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1 //===- HexagonMCChecker.h - Instruction bundle checking ---------*- 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 // This implements the checking of insns inside a bundle according to the
10 // packet constraint rules of the Hexagon ISA.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCHECKER_H
15 #define LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCHECKER_H
16 
19 #include "llvm/ADT/DenseMap.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/Support/SMLoc.h"
22 #include <set>
23 #include <utility>
24 
25 namespace llvm {
26 
27 class MCContext;
28 class MCInst;
29 class MCInstrInfo;
30 class MCRegisterInfo;
31 class MCSubtargetInfo;
32 
33 /// Check for a valid bundle.
35  MCContext &Context;
36  MCInst &MCB;
37  const MCRegisterInfo &RI;
38  MCInstrInfo const &MCII;
39  MCSubtargetInfo const &STI;
40  bool ReportErrors;
41 
42  /// Set of definitions: register #, if predicated, if predicated true.
43  using PredSense = std::pair<unsigned, bool>;
44  static const PredSense Unconditional;
45  using PredSet = std::multiset<PredSense>;
46  using PredSetIterator = std::multiset<PredSense>::iterator;
47 
48  using DefsIterator = DenseMap<unsigned, PredSet>::iterator;
50 
51  /// Set of weak definitions whose clashes should be enforced selectively.
52  using SoftDefsIterator = std::set<unsigned>::iterator;
53  std::set<unsigned> SoftDefs;
54 
55  /// Set of temporary definitions not committed to the register file.
56  using TmpDefsIterator = std::set<unsigned>::iterator;
57  std::set<unsigned> TmpDefs;
58 
59  /// Set of new predicates used.
60  using NewPredsIterator = std::set<unsigned>::iterator;
61  std::set<unsigned> NewPreds;
62 
63  /// Set of predicates defined late.
64  using LatePredsIterator = std::multiset<unsigned>::iterator;
65  std::multiset<unsigned> LatePreds;
66 
67  /// Set of uses.
68  using UsesIterator = std::set<unsigned>::iterator;
69  std::set<unsigned> Uses;
70 
71  /// Pre-defined set of read-only registers.
72  using ReadOnlyIterator = std::set<unsigned>::iterator;
73  std::set<unsigned> ReadOnly;
74 
75  void init();
76  void init(MCInst const &);
77  void initReg(MCInst const &, unsigned, unsigned &PredReg, bool &isTrue);
78 
79  bool registerUsed(unsigned Register);
80  std::tuple<MCInst const *, unsigned, HexagonMCInstrInfo::PredicateInfo>
81  registerProducer(unsigned Register,
83 
84  // Checks performed.
85  bool checkBranches();
86  bool checkPredicates();
87  bool checkNewValues();
88  bool checkRegisters();
89  bool checkRegistersReadOnly();
90  void checkRegisterCurDefs();
91  bool checkSolo();
92  bool checkShuffle();
93  bool checkSlots();
94  bool checkAXOK();
95  bool checkHWLoop();
96  bool checkCOFMax1();
97 
98  static void compoundRegisterMap(unsigned &);
99 
100  bool isPredicateRegister(unsigned R) const {
101  return (Hexagon::P0 == R || Hexagon::P1 == R || Hexagon::P2 == R ||
102  Hexagon::P3 == R);
103  }
104 
105  bool isLoopRegister(unsigned R) const {
106  return (Hexagon::SA0 == R || Hexagon::LC0 == R || Hexagon::SA1 == R ||
107  Hexagon::LC1 == R);
108  }
109 
110 public:
111  explicit HexagonMCChecker(MCContext &Context, MCInstrInfo const &MCII,
112  MCSubtargetInfo const &STI, MCInst &mcb,
113  const MCRegisterInfo &ri, bool ReportErrors = true);
114  explicit HexagonMCChecker(HexagonMCChecker const &Check,
115  MCSubtargetInfo const &STI, bool CopyReportErrors);
116 
117  bool check(bool FullCheck = true);
118  void reportErrorRegisters(unsigned Register);
119  void reportErrorNewValue(unsigned Register);
120  void reportError(SMLoc Loc, Twine const &Msg);
121  void reportNote(SMLoc Loc, Twine const &Msg);
122  void reportError(Twine const &Msg);
123  void reportWarning(Twine const &Msg);
124  void reportBranchErrors();
125 };
126 
127 } // end namespace llvm
128 
129 #endif // LLVM_LIB_TARGET_HEXAGON_MCTARGETDESC_HEXAGONMCCHECKER_H
static bool Check(DecodeStatus &Out, DecodeStatus In)
void reportErrorNewValue(unsigned Register)
This class represents lattice values for constants.
Definition: AllocatorList.h:23
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:80
void reportError(SMLoc Loc, Twine const &Msg)
void reportWarning(Twine const &Msg)
Context object for machine code objects.
Definition: MCContext.h:62
Instances of this class represent a single low-level machine instruction.
Definition: MCInst.h:158
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
void reportNote(SMLoc Loc, Twine const &Msg)
Interface to description of machine instruction set.
Definition: MCInstrInfo.h:23
HexagonMCChecker(MCContext &Context, MCInstrInfo const &MCII, MCSubtargetInfo const &STI, MCInst &mcb, const MCRegisterInfo &ri, bool ReportErrors=true)
Promote Memory to Register
Definition: Mem2Reg.cpp:109
void reportErrorRegisters(unsigned Register)
Generic base class for all target subtargets.
bool check(bool FullCheck=true)
Check for a valid bundle.
Represents a location in source code.
Definition: SMLoc.h:23