1 files changed, 45 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DebugLocStream.cpp b/llvm/lib/CodeGen/AsmPrinter/DebugLocStream.cpp
new file mode 100644
index 000000000000..f483d532ff07
--- /dev/null
+++ b/llvm/lib/CodeGen/AsmPrinter/DebugLocStream.cpp
@@ -0,0 +1,45 @@
+//===- DebugLocStream.cpp - DWARF debug_loc stream --------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "DebugLocStream.h"
+#include "DwarfDebug.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+
+using namespace llvm;
+
+bool DebugLocStream::finalizeList(AsmPrinter &Asm) {
+  if (Lists.back().EntryOffset == Entries.size()) {
+    // Empty list.  Delete it.
+    Lists.pop_back();
+    return false;
+  }
+
+  // Real list.  Generate a label for it.
+  Lists.back().Label = Asm.createTempSymbol("debug_loc");
+  return true;
+}
+
+void DebugLocStream::finalizeEntry() {
+  if (Entries.back().ByteOffset != DWARFBytes.size())
+    return;
+
+  // The last entry was empty.  Delete it.
+  Comments.erase(Comments.begin() + Entries.back().CommentOffset,
+                 Comments.end());
+  Entries.pop_back();
+
+  assert(Lists.back().EntryOffset <= Entries.size() &&
+         "Popped off more entries than are in the list");
+}
+
+DebugLocStream::ListBuilder::~ListBuilder() {
+  if (!Locs.finalizeList(Asm))
+    return;
+  V.initializeDbgValue(&MI);
+  V.setDebugLocListIndex(ListIndex);
+}