add llvm-mc support for parsing the .subsections_via_symbols directive.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75500 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.h b/tools/llvm-mc/AsmParser.h
index 620ac19..fcdd064 100644
--- a/tools/llvm-mc/AsmParser.h
+++ b/tools/llvm-mc/AsmParser.h
@@ -112,6 +112,9 @@
 
   bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
   bool ParseDirectiveDarwinZerofill(); // Darwin specific ".zerofill"
+
+  // Darwin specific ".subsections_via_symbols"
+  bool ParseDirectiveDarwinSubsectionsViaSymbols();
 };
 
 } // end namespace llvm