//
//===----------------------------------------------------------------------===//
-#ifndef CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H_
-#define CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H_
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_DBGVALUEHISTORYCALCULATOR_H
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
class MachineFunction;
class MachineInstr;
-class MDNode;
+class DILocalVariable;
+class DILocation;
class TargetRegisterInfo;
-// For each user variable, keep a list of DBG_VALUE instructions for it
-// in the order of appearance. The list can also contain another
-// instructions, which are assumed to clobber the previous DBG_VALUE.
-// The variables are listed in order of appearance.
-typedef MapVector<const MDNode *, SmallVector<const MachineInstr *, 4>>
-DbgValueHistoryMap;
+// For each user variable, keep a list of instruction ranges where this variable
+// is accessible. The variables are listed in order of appearance.
+class DbgValueHistoryMap {
+ // Each instruction range starts with a DBG_VALUE instruction, specifying the
+ // location of a variable, which is assumed to be valid until the end of the
+ // range. If end is not specified, location is valid until the start
+ // instruction of the next instruction range, or until the end of the
+ // function.
+public:
+ typedef std::pair<const MachineInstr *, const MachineInstr *> InstrRange;
+ typedef SmallVector<InstrRange, 4> InstrRanges;
+ typedef std::pair<const DILocalVariable *, const DILocation *>
+ InlinedVariable;
+ typedef MapVector<InlinedVariable, InstrRanges> InstrRangesMap;
+
+private:
+ InstrRangesMap VarInstrRanges;
+
+public:
+ void startInstrRange(InlinedVariable Var, const MachineInstr &MI);
+ void endInstrRange(InlinedVariable Var, const MachineInstr &MI);
+ // Returns register currently describing @Var. If @Var is currently
+ // unaccessible or is not described by a register, returns 0.
+ unsigned getRegisterForVar(InlinedVariable Var) const;
+
+ bool empty() const { return VarInstrRanges.empty(); }
+ void clear() { VarInstrRanges.clear(); }
+ InstrRangesMap::const_iterator begin() const { return VarInstrRanges.begin(); }
+ InstrRangesMap::const_iterator end() const { return VarInstrRanges.end(); }
+};
void calculateDbgValueHistory(const MachineFunction *MF,
const TargetRegisterInfo *TRI,