llvm-mc: Add MCAsmParser::Parse[Paren]Expression forms which return an MCExpr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80574 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.cpp b/tools/llvm-mc/AsmParser.cpp
index 5d73a9f..78cab38 100644
--- a/tools/llvm-mc/AsmParser.cpp
+++ b/tools/llvm-mc/AsmParser.cpp
@@ -21,6 +21,7 @@
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCValue.h"
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetAsmParser.h"
@@ -258,6 +259,13 @@
          ParseBinOpRHS(1, Res);
 }
 
+bool AsmParser::ParseParenExpression(const MCExpr *&Res) {
+  if (ParseParenExpr(Res))
+    return true;
+
+  return false;
+}
+
 bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {
   const MCExpr *Expr;