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https://github.com/c64scene-ar/llvm-6502.git
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a807d6783a
Use more straightforward way to represent the set of instruction ranges where the location of a user variable is defined - vector of pairs of instructions (defining start/end of each range), instead of a flattened vector of instructions where some instructions are supposed to start the range, and the rest are supposed to "clobber" it. Simplify the code which generates actual .debug_loc entries. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209698 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
2.1 KiB
C++
55 lines
2.1 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 CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H_
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#define 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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namespace llvm {
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class MachineFunction;
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class MachineInstr;
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class MDNode;
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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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typedef std::pair<const MachineInstr *, const MachineInstr *> InstrRange;
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typedef SmallVector<InstrRange, 4> InstrRanges;
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typedef MapVector<const MDNode *, InstrRanges> InstrRangesMap;
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InstrRangesMap VarInstrRanges;
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public:
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void startInstrRange(const MDNode *Var, const MachineInstr &MI);
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void endInstrRange(const MDNode *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(const MDNode *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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}
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#endif
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