1 files changed, 20 insertions, 6 deletions
diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index ae086bcd..2430d98 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -102,6 +102,10 @@ static cl::opt<bool> PrintProfData(
     "print-prof-data", cl::Hidden,
     cl::desc("Pretty print perf data (branch weights, etc) when dumping"));
 
+static cl::opt<bool> PreserveAssemblyUseListOrder(
+    "preserve-ll-uselistorder", cl::Hidden, cl::init(false),
+    cl::desc("Preserve use-list order when writing LLVM assembly."));
+
 // Make virtual table appear in this compilation unit.
 AssemblyAnnotationWriter::~AssemblyAnnotationWriter() = default;
 
@@ -2370,10 +2374,16 @@ static void writeDICompileUnit(raw_ostream &Out, const DICompileUnit *N,
   Out << "!DICompileUnit(";
   MDFieldPrinter Printer(Out, WriterCtx);
 
-  Printer.printDwarfEnum("language",
-                         N->getSourceLanguage().getUnversionedName(),
-                         dwarf::LanguageString,
-                         /* ShouldSkipZero */ false);
+  auto Lang = N->getSourceLanguage();
+  if (Lang.hasVersionedName())
+    Printer.printDwarfEnum(
+        "sourceLanguageName",
+        static_cast<llvm::dwarf::SourceLanguageName>(Lang.getName()),
+        dwarf::SourceLanguageNameString,
+        /* ShouldSkipZero */ false);
+  else
+    Printer.printDwarfEnum("language", Lang.getName(), dwarf::LanguageString,
+                           /* ShouldSkipZero */ false);
 
   Printer.printMetadata("file", N->getRawFile(), /* ShouldSkipNull */ false);
   Printer.printString("producer", N->getProducer());
@@ -2933,7 +2943,10 @@ AssemblyWriter::AssemblyWriter(formatted_raw_ostream &o, SlotTracker &Mac,
                                bool IsForDebug, bool ShouldPreserveUseListOrder)
     : Out(o), TheModule(M), Machine(Mac), TypePrinter(M), AnnotationWriter(AAW),
       IsForDebug(IsForDebug),
-      ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {
+      ShouldPreserveUseListOrder(
+          PreserveAssemblyUseListOrder.getNumOccurrences()
+              ? PreserveAssemblyUseListOrder
+              : ShouldPreserveUseListOrder) {
   if (!TheModule)
     return;
   for (const GlobalObject &GO : TheModule->global_objects())
@@ -2944,7 +2957,8 @@ AssemblyWriter::AssemblyWriter(formatted_raw_ostream &o, SlotTracker &Mac,
 AssemblyWriter::AssemblyWriter(formatted_raw_ostream &o, SlotTracker &Mac,
                                const ModuleSummaryIndex *Index, bool IsForDebug)
     : Out(o), TheIndex(Index), Machine(Mac), TypePrinter(/*Module=*/nullptr),
-      IsForDebug(IsForDebug), ShouldPreserveUseListOrder(false) {}
+      IsForDebug(IsForDebug),
+      ShouldPreserveUseListOrder(PreserveAssemblyUseListOrder) {}
 
 void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType) {
   if (!Operand) {