ARM parse parenthesized expressions for label references.

Partial fix for rdar://10348687.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143063 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index a278f6f..99f619c 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -3691,6 +3691,7 @@
     // Fall though for the Identifier case that is not a register or a
     // special name.
   }
+  case AsmToken::LParen:  // parenthesized expressions like (_strcmp-4)
   case AsmToken::Integer: // things like 1f and 2b as a branch targets
   case AsmToken::Dot: {   // . as a branch target
     // This was not a register so parse other operands that start with an