[DO NOT MERGE][DebugInfo] Implement debug_names's IDX_parent attribute

[felipepiovezan]

The commits are meant to be looked at one at a time.

https://discourse.llvm.org/t/rfc-improve-dwarf-5-debug-names-type-lookup-parsing-speed/74151/36

[github-actions]

⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️

You can test this locally with the following command:

git-clang-format --diff 80aeb622117f6411e65bff42be5231720e8b8cef 0450d05d26418796de24083acb240feec9f058d3 -- lldb/source/Commands/CommandObjectExpression.cpp lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.h lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.cpp lldb/source/Plugins/SymbolFile/DWARF/DWARFDeclContext.h lldb/source/Plugins/SymbolFile/DWARF/DWARFIndex.cpp lldb/source/Plugins/SymbolFile/DWARF/DWARFIndex.h lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.cpp lldb/source/Plugins/SymbolFile/DWARF/DebugNamesDWARFIndex.h lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp lldb/unittests/SymbolFile/DWARF/DWARFDIETest.cpp llvm/include/llvm/CodeGen/AccelTable.h llvm/include/llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h llvm/lib/CodeGen/AsmPrinter/AccelTable.cpp llvm/lib/DWARFLinker/DWARFLinker.cpp llvm/lib/DWARFLinkerParallel/DWARFLinkerImpl.cpp llvm/lib/DWARFLinkerParallel/DWARFLinkerUnit.h llvm/lib/DebugInfo/DWARF/DWARFAcceleratorTable.cpp

View the diff from clang-format here.

diff --git a/lldb/source/Commands/CommandObjectExpression.cpp b/lldb/source/Commands/CommandObjectExpression.cpp
index 59ea097fe8..0bff699be7 100644
--- a/lldb/source/Commands/CommandObjectExpression.cpp
+++ b/lldb/source/Commands/CommandObjectExpression.cpp
@@ -517,7 +517,8 @@ bool CommandObjectExpression::EvaluateExpression(llvm::StringRef expr,
   }
 
   auto end = std::chrono::steady_clock::now();
-  auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
+  auto duration =
+      std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
   error_stream.Printf("Finished expr in: %" PRIu64, duration.count());
   return (success != eExpressionSetupError &&
           success != eExpressionParseError);
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
index 775b7a2e73..340b9acf80 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
@@ -192,9 +192,8 @@ DWARFDebugInfo::GetDIE(const DIERef &die_ref) {
   return DWARFDIE(); // Not found
 }
 
-llvm::StringRef
-DWARFDebugInfo::PeekDIEName(const DIERef &die_ref) {
-  if(DWARFUnit *cu = GetUnit(die_ref))
+llvm::StringRef DWARFDebugInfo::PeekDIEName(const DIERef &die_ref) {
+  if (DWARFUnit *cu = GetUnit(die_ref))
     return cu->GetNonSkeletonUnit().PeekDIEName(die_ref.die_offset());
   return llvm::StringRef();
 }