Revert "[AIX][BigArchive] Treat the archive is empty if the first child member offset is zero"

This reverts commit 7f0003c19c3a47f484ea9cc929728808b27ace32.

Reason: This broke the ASan buildbot, see the comments in
https://reviews.llvm.org/D138986 for more information.

1 files changed, 1 insertions, 9 deletions

diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
index 046bcb3..2cf9241 100644
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -949,15 +949,7 @@ Archive::child_iterator Archive::child_begin(Error &Err,
     return child_iterator::itr(
         Child(this, FirstRegularData, FirstRegularStartOfFile), Err);
 
-  uint64_t FirstChildOffset = getFirstChildOffset();
-  const char *Loc = Data.getBufferStart() + FirstChildOffset;
-  if (Loc >= Data.getBufferEnd()) {
-    Err = malformedError("First member offset " + Twine(FirstChildOffset) +
-                         " is beyond the data buffer which has size of " +
-                         Twine(Data.getBufferSize()));
-    return child_end();
-  }
-
+  const char *Loc = Data.getBufferStart() + getFirstChildOffset();
   Child C(this, Loc, &Err);
   if (Err)
     return child_end();