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

1 files changed, 16 insertions, 0 deletions

diff --git a/include/llvm/MC/MCAsmParser.h b/include/llvm/MC/MCAsmParser.h
index e0a48f1e9c..23c97f58af 100644
--- a/include/llvm/MC/MCAsmParser.h
+++ b/include/llvm/MC/MCAsmParser.h
@@ -15,6 +15,7 @@
 namespace llvm {
 class MCAsmLexer;
 class MCContext;
+class MCExpr;
 class MCValue;
 class SMLoc;
 class Twine;
@@ -45,6 +46,21 @@ public:
   /// clients.
   virtual bool Error(SMLoc L, const Twine &Msg) = 0;
 
+  /// ParseExpression - Parse an arbitrary expression.
+  ///
+  /// @param Res - The value of the expression. The result is undefined
+  /// on error.
+  /// @result - False on success.
+  virtual bool ParseExpression(const MCExpr *&Res) = 0;
+
+  /// ParseParenExpression - Parse an arbitrary expression, assuming that an
+  /// initial '(' has already been consumed.
+  ///
+  /// @param Res - The value of the expression. The result is undefined
+  /// on error.
+  /// @result - False on success.
+  virtual bool ParseParenExpression(const MCExpr *&Res) = 0;
+
   /// ParseAbsoluteExpression - Parse an expression which must evaluate to an
   /// absolute value.
   ///