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 
13 using namespace llvm;
14 
15 bool 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 
27 void 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 
40 DebugLocStream::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