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author | David Blaikie <dblaikie@gmail.com> | 2014-04-01 21:49:04 +0000 |
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committer | David Blaikie <dblaikie@gmail.com> | 2014-04-01 21:49:04 +0000 |
commit | e061a365909b5f62a79479b66f580d6a700324d0 (patch) | |
tree | 470601f65644afb7e787a57c4a5a53f007856b58 /lib/CodeGen/AsmPrinter/DebugLocEntry.h | |
parent | 2f1e34736e4f14c57d1c1fdcfc8b9e133c4885d9 (diff) | |
download | llvm-e061a365909b5f62a79479b66f580d6a700324d0.tar.gz llvm-e061a365909b5f62a79479b66f580d6a700324d0.tar.bz2 llvm-e061a365909b5f62a79479b66f580d6a700324d0.tar.xz |
DebugInfo: Split DebugLocEntry into its own file.
It seems big enough that it deserves its own file - but it is header
only, so there's no need for another cpp file, etc.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205360 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/AsmPrinter/DebugLocEntry.h')
-rw-r--r-- | lib/CodeGen/AsmPrinter/DebugLocEntry.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/lib/CodeGen/AsmPrinter/DebugLocEntry.h b/lib/CodeGen/AsmPrinter/DebugLocEntry.h new file mode 100644 index 0000000000..e62897e86a --- /dev/null +++ b/lib/CodeGen/AsmPrinter/DebugLocEntry.h @@ -0,0 +1,112 @@ +//===-- llvm/CodeGen/DebugLocEntry.h - Entry in debug_loc list -*- C++ -*--===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__ +#define CODEGEN_ASMPRINTER_DEBUGLOCENTRY_H__ +#include "llvm/IR/Constants.h" +#include "llvm/MC/MachineLocation.h" +#include "llvm/MC/MCSymbol.h" + +namespace llvm { +class DwarfCompileUnit; +class MDNode; +/// \brief This struct describes location entries emitted in the .debug_loc +/// section. +class DebugLocEntry { + // Begin and end symbols for the address range that this location is valid. + const MCSymbol *Begin; + const MCSymbol *End; + + // Type of entry that this represents. + enum EntryType { E_Location, E_Integer, E_ConstantFP, E_ConstantInt }; + enum EntryType EntryKind; + + union { + int64_t Int; + const ConstantFP *CFP; + const ConstantInt *CIP; + } Constants; + + // The location in the machine frame. + MachineLocation Loc; + + // The variable to which this location entry corresponds. + const MDNode *Variable; + + // The compile unit to which this location entry is referenced by. + const DwarfCompileUnit *Unit; + +public: + DebugLocEntry() : Begin(0), End(0), Variable(0), Unit(0) { + Constants.Int = 0; + } + DebugLocEntry(const MCSymbol *B, const MCSymbol *E, MachineLocation &L, + const MDNode *V, const DwarfCompileUnit *U) + : Begin(B), End(E), Loc(L), Variable(V), Unit(U) { + Constants.Int = 0; + EntryKind = E_Location; + } + DebugLocEntry(const MCSymbol *B, const MCSymbol *E, int64_t i, + const DwarfCompileUnit *U) + : Begin(B), End(E), Variable(0), Unit(U) { + Constants.Int = i; + EntryKind = E_Integer; + } + DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantFP *FPtr, + const DwarfCompileUnit *U) + : Begin(B), End(E), Variable(0), Unit(U) { + Constants.CFP = FPtr; + EntryKind = E_ConstantFP; + } + DebugLocEntry(const MCSymbol *B, const MCSymbol *E, const ConstantInt *IPtr, + const DwarfCompileUnit *U) + : Begin(B), End(E), Variable(0), Unit(U) { + Constants.CIP = IPtr; + EntryKind = E_ConstantInt; + } + + /// \brief Empty entries are also used as a trigger to emit temp label. Such + /// labels are referenced is used to find debug_loc offset for a given DIE. + bool isEmpty() const { return Begin == 0 && End == 0; } + bool Merge(const DebugLocEntry &Next) { + if (End != Next.Begin) + return false; + + if (EntryKind != Next.EntryKind) + return false; + + switch (EntryKind) { + case E_Location: + if (Loc != Next.Loc) return false; + case E_Integer: + if (Constants.Int != Next.Constants.Int) return false; + case E_ConstantFP: + if (Constants.CFP != Next.Constants.CFP) return false; + case E_ConstantInt: + if (Constants.CIP != Next.Constants.CIP) return false; + } + + return true; + } + bool isLocation() const { return EntryKind == E_Location; } + bool isInt() const { return EntryKind == E_Integer; } + bool isConstantFP() const { return EntryKind == E_ConstantFP; } + bool isConstantInt() const { return EntryKind == E_ConstantInt; } + int64_t getInt() const { return Constants.Int; } + const ConstantFP *getConstantFP() const { return Constants.CFP; } + const ConstantInt *getConstantInt() const { return Constants.CIP; } + const MDNode *getVariable() const { return Variable; } + const MCSymbol *getBeginSym() const { return Begin; } + const MCSymbol *getEndSym() const { return End; } + const DwarfCompileUnit *getCU() const { return Unit; } + MachineLocation getLoc() const { return Loc; } +}; + +} +#endif |