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(Name: "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(first: Comments.begin() + Entries.back().CommentOffset,
33 last: 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.emplace<Loc::Multi>(args&: ListIndex, args&: TagOffset);
44}
45