[llvm-lib] Write object files in reversed order.

This isn't strictly needed, but this matches how MSVC lib.exe writes to
archives, so this makes llvm-lib more compatible and simplifies comparing
output between tools.

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D143536

1 files changed, 7 insertions, 2 deletions

diff --git a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
index ade753a..f92ff3d 100644
--- a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
+++ b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp
@@ -133,12 +133,14 @@ static void doList(opt::InputArgList& Args) {
   object::Archive Archive(B.get()->getMemBufferRef(), Err);
   fatalOpenError(std::move(Err), B->getBufferIdentifier());
 
+  std::vector<StringRef> Names;
   for (auto &C : Archive.children(Err)) {
     Expected<StringRef> NameOrErr = C.getName();
     fatalOpenError(NameOrErr.takeError(), B->getBufferIdentifier());
-    StringRef Name = NameOrErr.get();
-    llvm::outs() << Name << '\n';
+    Names.push_back(NameOrErr.get());
   }
+  for (auto Name : reverse(Names))
+    llvm::outs() << Name << '\n';
   fatalOpenError(std::move(Err), B->getBufferIdentifier());
 }
 
@@ -392,6 +394,9 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) {
     }
   }
 
+  // For compatibility with MSVC, reverse member vector after de-duplication.
+  std::reverse(Members.begin(), Members.end());
+
   if (Error E =
           writeArchive(OutputPath, Members,
                        /*WriteSymtab=*/true, object::Archive::K_GNU,