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9caba155e1
llvm-svn: 311124
64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
//===- llvm/CodeGen/AsmPrinter/DbgValueHistoryCalculator.h ------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/SmallVector.h"
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#include <utility>
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namespace llvm {
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class DILocalVariable;
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class DILocation;
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class MachineFunction;
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class MachineInstr;
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class TargetRegisterInfo;
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// For each user variable, keep a list of instruction ranges where this variable
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// is accessible. The variables are listed in order of appearance.
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class DbgValueHistoryMap {
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// Each instruction range starts with a DBG_VALUE instruction, specifying the
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// location of a variable, which is assumed to be valid until the end of the
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// range. If end is not specified, location is valid until the start
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// instruction of the next instruction range, or until the end of the
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// function.
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public:
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using InstrRange = std::pair<const MachineInstr *, const MachineInstr *>;
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using InstrRanges = SmallVector<InstrRange, 4>;
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using InlinedVariable =
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std::pair<const DILocalVariable *, const DILocation *>;
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using InstrRangesMap = MapVector<InlinedVariable, InstrRanges>;
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private:
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InstrRangesMap VarInstrRanges;
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public:
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void startInstrRange(InlinedVariable Var, const MachineInstr &MI);
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void endInstrRange(InlinedVariable Var, const MachineInstr &MI);
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// Returns register currently describing @Var. If @Var is currently
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// unaccessible or is not described by a register, returns 0.
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unsigned getRegisterForVar(InlinedVariable Var) const;
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bool empty() const { return VarInstrRanges.empty(); }
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void clear() { VarInstrRanges.clear(); }
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InstrRangesMap::const_iterator begin() const { return VarInstrRanges.begin(); }
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InstrRangesMap::const_iterator end() const { return VarInstrRanges.end(); }
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};
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void calculateDbgValueHistory(const MachineFunction *MF,
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const TargetRegisterInfo *TRI,
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DbgValueHistoryMap &Result);
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} // end namespace llvm
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#endif // LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
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