llvm-mc: Emit .lcomm as .zerofill.

llvm-svn: 80343

1 files changed, 7 insertions, 1 deletions

diff --git a/llvm/tools/llvm-mc/AsmParser.cpp b/llvm/tools/llvm-mc/AsmParser.cpp
index 9f219925b0f..74512ca9353 100644
--- a/llvm/tools/llvm-mc/AsmParser.cpp
+++ b/llvm/tools/llvm-mc/AsmParser.cpp
@@ -1258,7 +1258,13 @@ bool AsmParser::ParseDirectiveComm(bool IsLocal) {
     return Error(IDLoc, "invalid symbol redefinition");
 
   // Create the Symbol as a common or local common with Size and Pow2Alignment
-  Out.EmitCommonSymbol(Sym, Size, Pow2Alignment, IsLocal);
+  if (IsLocal)
+    Out.EmitZerofill(getMachOSection("__DATA", "__bss",
+                                     MCSectionMachO::S_ZEROFILL, 0,
+                                     SectionKind()),
+                     Sym, Size, Pow2Alignment);
+  else 
+    Out.EmitCommonSymbol(Sym, Size, Pow2Alignment);
 
   return false;
 }