llvm-mirror/lib/CodeGen/AsmPrinter/DebugLocStream.h
Chandler Carruth eb66b33867 Sort the remaining #include lines in include/... and lib/....
I did this a long time ago with a janky python script, but now
clang-format has built-in support for this. I fed clang-format every
line with a #include and let it re-sort things according to the precise
LLVM rules for include ordering baked into clang-format these days.

I've reverted a number of files where the results of sorting includes
isn't healthy. Either places where we have legacy code relying on
particular include ordering (where possible, I'll fix these separately)
or where we have particular formatting around #include lines that
I didn't want to disturb in this patch.

This patch is *entirely* mechanical. If you get merge conflicts or
anything, just ignore the changes in this patch and run clang-format
over your #include lines in the files.

Sorry for any noise here, but it is important to keep these things
stable. I was seeing an increasing number of patches with irrelevant
re-ordering of #include lines because clang-format was used. This patch
at least isolates that churn, makes it easy to skip when resolving
conflicts, and gets us to a clean baseline (again).

llvm-svn: 304787
2017-06-06 11:49:48 +00:00

194 lines
5.8 KiB
C++

//===--- lib/CodeGen/DebugLocStream.h - DWARF debug_loc stream --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCSTREAM_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGLOCSTREAM_H
#include "ByteStreamer.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
namespace llvm {
class AsmPrinter;
class DbgVariable;
class DwarfCompileUnit;
class MachineInstr;
class MCSymbol;
/// \brief Byte stream of .debug_loc entries.
///
/// Stores a unified stream of .debug_loc entries. There's \a List for each
/// variable/inlined-at pair, and an \a Entry for each \a DebugLocEntry.
///
/// FIXME: Do we need all these temp symbols?
/// FIXME: Why not output directly to the output stream?
class DebugLocStream {
public:
struct List {
DwarfCompileUnit *CU;
MCSymbol *Label = nullptr;
size_t EntryOffset;
List(DwarfCompileUnit *CU, size_t EntryOffset)
: CU(CU), EntryOffset(EntryOffset) {}
};
struct Entry {
const MCSymbol *BeginSym;
const MCSymbol *EndSym;
size_t ByteOffset;
size_t CommentOffset;
Entry(const MCSymbol *BeginSym, const MCSymbol *EndSym, size_t ByteOffset,
size_t CommentOffset)
: BeginSym(BeginSym), EndSym(EndSym), ByteOffset(ByteOffset),
CommentOffset(CommentOffset) {}
};
private:
SmallVector<List, 4> Lists;
SmallVector<Entry, 32> Entries;
SmallString<256> DWARFBytes;
SmallVector<std::string, 32> Comments;
/// \brief Only verbose textual output needs comments. This will be set to
/// true for that case, and false otherwise.
bool GenerateComments;
public:
DebugLocStream(bool GenerateComments) : GenerateComments(GenerateComments) { }
size_t getNumLists() const { return Lists.size(); }
const List &getList(size_t LI) const { return Lists[LI]; }
ArrayRef<List> getLists() const { return Lists; }
class ListBuilder;
class EntryBuilder;
private:
/// \brief Start a new .debug_loc entry list.
///
/// Start a new .debug_loc entry list. Return the new list's index so it can
/// be retrieved later via \a getList().
///
/// Until the next call, \a startEntry() will add entries to this list.
size_t startList(DwarfCompileUnit *CU) {
size_t LI = Lists.size();
Lists.emplace_back(CU, Entries.size());
return LI;
}
/// Finalize a .debug_loc entry list.
///
/// If there are no entries in this list, delete it outright. Otherwise,
/// create a label with \a Asm.
///
/// \return false iff the list is deleted.
bool finalizeList(AsmPrinter &Asm);
/// \brief Start a new .debug_loc entry.
///
/// Until the next call, bytes added to the stream will be added to this
/// entry.
void startEntry(const MCSymbol *BeginSym, const MCSymbol *EndSym) {
Entries.emplace_back(BeginSym, EndSym, DWARFBytes.size(), Comments.size());
}
/// Finalize a .debug_loc entry, deleting if it's empty.
void finalizeEntry();
public:
BufferByteStreamer getStreamer() {
return BufferByteStreamer(DWARFBytes, Comments, GenerateComments);
}
ArrayRef<Entry> getEntries(const List &L) const {
size_t LI = getIndex(L);
return makeArrayRef(Entries)
.slice(Lists[LI].EntryOffset, getNumEntries(LI));
}
ArrayRef<char> getBytes(const Entry &E) const {
size_t EI = getIndex(E);
return makeArrayRef(DWARFBytes.begin(), DWARFBytes.end())
.slice(Entries[EI].ByteOffset, getNumBytes(EI));
}
ArrayRef<std::string> getComments(const Entry &E) const {
size_t EI = getIndex(E);
return makeArrayRef(Comments)
.slice(Entries[EI].CommentOffset, getNumComments(EI));
}
private:
size_t getIndex(const List &L) const {
assert(&Lists.front() <= &L && &L <= &Lists.back() &&
"Expected valid list");
return &L - &Lists.front();
}
size_t getIndex(const Entry &E) const {
assert(&Entries.front() <= &E && &E <= &Entries.back() &&
"Expected valid entry");
return &E - &Entries.front();
}
size_t getNumEntries(size_t LI) const {
if (LI + 1 == Lists.size())
return Entries.size() - Lists[LI].EntryOffset;
return Lists[LI + 1].EntryOffset - Lists[LI].EntryOffset;
}
size_t getNumBytes(size_t EI) const {
if (EI + 1 == Entries.size())
return DWARFBytes.size() - Entries[EI].ByteOffset;
return Entries[EI + 1].ByteOffset - Entries[EI].ByteOffset;
}
size_t getNumComments(size_t EI) const {
if (EI + 1 == Entries.size())
return Comments.size() - Entries[EI].CommentOffset;
return Entries[EI + 1].CommentOffset - Entries[EI].CommentOffset;
}
};
/// Builder for DebugLocStream lists.
class DebugLocStream::ListBuilder {
DebugLocStream &Locs;
AsmPrinter &Asm;
DbgVariable &V;
const MachineInstr &MI;
size_t ListIndex;
public:
ListBuilder(DebugLocStream &Locs, DwarfCompileUnit &CU, AsmPrinter &Asm,
DbgVariable &V, const MachineInstr &MI)
: Locs(Locs), Asm(Asm), V(V), MI(MI), ListIndex(Locs.startList(&CU)) {}
/// Finalize the list.
///
/// If the list is empty, delete it. Otherwise, finalize it by creating a
/// temp symbol in \a Asm and setting up the \a DbgVariable.
~ListBuilder();
DebugLocStream &getLocs() { return Locs; }
};
/// Builder for DebugLocStream entries.
class DebugLocStream::EntryBuilder {
DebugLocStream &Locs;
public:
EntryBuilder(ListBuilder &List, const MCSymbol *Begin, const MCSymbol *End)
: Locs(List.getLocs()) {
Locs.startEntry(Begin, End);
}
/// Finalize the entry, deleting it if it's empty.
~EntryBuilder() { Locs.finalizeEntry(); }
BufferByteStreamer getStreamer() { return Locs.getStreamer(); }
};
} // namespace llvm
#endif