1 //===-- llvm/CodeGen/DebugLocEntry.h - Entry in debug_loc list -*- C++ -*--===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
11 #define CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__
12 #include "llvm/IR/Constants.h"
13 #include "llvm/MC/MachineLocation.h"
14 #include "llvm/MC/MCSymbol.h"
17 class DwarfCompileUnit;
19 /// \brief This struct describes location entries emitted in the .debug_loc
22 // Begin and end symbols for the address range that this location is valid.
23 const MCSymbol *Begin;
26 // Type of entry that this represents.
27 enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt };
28 enum EntryType EntryKind;
32 const ConstantFP *CFP;
33 const ConstantInt *CIP;
36 // The location in the machine frame.
39 // The variable to which this location entry corresponds.
40 const MDNode *Variable;
42 // The compile unit to which this location entry is referenced by.
43 const DwarfCompileUnit *Unit;
45 bool hasSameValueOrLocation(const DebugLocEntry &Next) {
46 if (EntryKind != Next.EntryKind)
52 EqualValues = Loc == Next.Loc;
55 EqualValues = Constants.Int == Next.Constants.Int;
58 EqualValues = Constants.CFP == Next.Constants.CFP;
61 EqualValues = Constants.CIP == Next.Constants.CIP;
69 DebugLocEntry() : Begin(0), End(0), Variable(0), Unit(0) {
72 DebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L,
73 const MDNode *V, const DwarfCompileUnit *U)
74 : Begin(B), End(E), Loc(L), Variable(V), Unit(U) {
76 EntryKind = E_Location;
78 DebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i,
79 const DwarfCompileUnit *U)
80 : Begin(B), End(E), Variable(0), Unit(U) {
82 EntryKind = E_Integer;
84 DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantFP *FPtr,
85 const DwarfCompileUnit *U)
86 : Begin(B), End(E), Variable(0), Unit(U) {
88 EntryKind = E_ConstantFP;
90 DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantInt *IPtr,
91 const DwarfCompileUnit *U)
92 : Begin(B), End(E), Variable(0), Unit(U) {
94 EntryKind = E_ConstantInt;
97 bool Merge(const DebugLocEntry &Next) {
98 if (End == Next.Begin && hasSameValueOrLocation(Next)) {
104 bool isLocation() const { return EntryKind == E_Location; }
105 bool isInt() const { return EntryKind == E_Integer; }
106 bool isConstantFP() const { return EntryKind == E_ConstantFP; }
107 bool isConstantInt() const { return EntryKind == E_ConstantInt; }
108 int64_t getInt() const { return Constants.Int; }
109 const ConstantFP *getConstantFP() const { return Constants.CFP; }
110 const ConstantInt *getConstantInt() const { return Constants.CIP; }
111 const MDNode *getVariable() const { return Variable; }
112 const MCSymbol *getBeginSym() const { return Begin; }
113 const MCSymbol *getEndSym() const { return End; }
114 const DwarfCompileUnit *getCU() const { return Unit; }
115 MachineLocation getLoc() const { return Loc; }