LLVM  4.0.0
DbgValueHistoryCalculator.h
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1 //===-- llvm/CodeGen/AsmPrinter/DbgValueHistoryCalculator.h ----*- 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 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
11 #define LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
12 
13 #include "llvm/ADT/MapVector.h"
14 #include "llvm/ADT/SmallVector.h"
16 
17 namespace llvm {
18 
19 class MachineFunction;
20 class MachineInstr;
21 class TargetRegisterInfo;
22 
23 // For each user variable, keep a list of instruction ranges where this variable
24 // is accessible. The variables are listed in order of appearance.
26  // Each instruction range starts with a DBG_VALUE instruction, specifying the
27  // location of a variable, which is assumed to be valid until the end of the
28  // range. If end is not specified, location is valid until the start
29  // instruction of the next instruction range, or until the end of the
30  // function.
31 public:
32  typedef std::pair<const MachineInstr *, const MachineInstr *> InstrRange;
34  typedef std::pair<const DILocalVariable *, const DILocation *>
37 
38 private:
39  InstrRangesMap VarInstrRanges;
40 
41 public:
43  void endInstrRange(InlinedVariable Var, const MachineInstr &MI);
44  // Returns register currently describing @Var. If @Var is currently
45  // unaccessible or is not described by a register, returns 0.
46  unsigned getRegisterForVar(InlinedVariable Var) const;
47 
48  bool empty() const { return VarInstrRanges.empty(); }
49  void clear() { VarInstrRanges.clear(); }
50  InstrRangesMap::const_iterator begin() const { return VarInstrRanges.begin(); }
51  InstrRangesMap::const_iterator end() const { return VarInstrRanges.end(); }
52 };
53 
54 void calculateDbgValueHistory(const MachineFunction *MF,
55  const TargetRegisterInfo *TRI,
56  DbgValueHistoryMap &Result);
57 }
58 
59 #endif
void calculateDbgValueHistory(const MachineFunction *MF, const TargetRegisterInfo *TRI, DbgValueHistoryMap &Result)
void clear()
Definition: MapVector.h:72
InstrRangesMap::const_iterator end() const
std::pair< const MachineInstr *, const MachineInstr * > InstrRange
bool empty() const
Definition: MapVector.h:63
SmallVector< InstrRange, 4 > InstrRanges
void startInstrRange(InlinedVariable Var, const MachineInstr &MI)
std::vector< std::pair< InlinedVariable, InstrRanges > >::const_iterator const_iterator
Definition: MapVector.h:41
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small...
Definition: SmallVector.h:843
InstrRangesMap::const_iterator begin() const
Representation of each machine instruction.
Definition: MachineInstr.h:52
MapVector< InlinedVariable, InstrRanges > InstrRangesMap
void endInstrRange(InlinedVariable Var, const MachineInstr &MI)
iterator begin()
Definition: MapVector.h:53
iterator end()
Definition: MapVector.h:55
unsigned getRegisterForVar(InlinedVariable Var) const
std::pair< const DILocalVariable *, const DILocation * > InlinedVariable
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