DebugLocStream.cpp revision 360784 
1//===- DebugLocStream.cpp - DWARF debug_loc stream --------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "DebugLocStream.h"
10#include "DwarfDebug.h"
11#include "llvm/CodeGen/AsmPrinter.h"
12
13using namespace llvm;
14
15bool DebugLocStream::finalizeList(AsmPrinter &Asm) {
16  if (Lists.back().EntryOffset == Entries.size()) {
17    // Empty list.  Delete it.
18    Lists.pop_back();
19    return false;
20  }
21
22  // Real list.  Generate a label for it.
23  Lists.back().Label = Asm.createTempSymbol("debug_loc");
24  return true;
25}
26
27void DebugLocStream::finalizeEntry() {
28  if (Entries.back().ByteOffset != DWARFBytes.size())
29    return;
30
31  // The last entry was empty.  Delete it.
32  Comments.erase(Comments.begin() + Entries.back().CommentOffset,
33                 Comments.end());
34  Entries.pop_back();
35
36  assert(Lists.back().EntryOffset <= Entries.size() &&
37         "Popped off more entries than are in the list");
38}
39
40DebugLocStream::ListBuilder::~ListBuilder() {
41  if (!Locs.finalizeList(Asm))
42    return;
43  V.initializeDbgValue(&MI);
44  V.setDebugLocListIndex(ListIndex);
45  if (TagOffset)
46    V.setDebugLocListTagOffset(*TagOffset);
47}
48