darwin doesn't support .bss, but it does have .zerofill


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33303 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index d80996f..1735220 100644
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -47,6 +47,8 @@
       Data64bitsDirective = 0;       // we can't emit a 64-bit unit
     ZeroDirective = "\t.space\t";  // ".space N" emits N zeros.
     PrivateGlobalPrefix = "L";     // Marker for constant pool idxs
+    BSSSection = 0;                       // no BSS section.
+    ZeroFillDirective = "\t.zerofill\t";  // Uses .zerofill
     ConstantPoolSection = "\t.const\n";
     JumpTableDataSection = "\t.const\n";
     CStringSection = "\t.cstring";