llvm-mc/x86: Fix bug in disambiguation of displacement operand, introduced by me

(I think).
 - We weren't properly parsing the leading parenthesized expression in something
   like 'push (4)(%eax)'.
 
 - Added ParseParenRelocatableExpression to support this. I suspect we should
   just use lookahead, though.

 - Test case to follow.

llvm-svn: 74685

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/tools/llvm-mc/AsmParser.h b/llvm/tools/llvm-mc/AsmParser.h
index ae5c414c03d..333b284eac9 100644
--- a/llvm/tools/llvm-mc/AsmParser.h
+++ b/llvm/tools/llvm-mc/AsmParser.h
@@ -73,6 +73,16 @@ private:
   /// @result - False on success.
   bool ParseRelocatableExpression(MCValue &Res);
 
+  /// ParseParenRelocatableExpression - Parse an expression which must be
+  /// relocatable, assuming that an initial '(' has already been consumed.
+  ///
+  /// @param Res - The relocatable expression value. The result is undefined on
+  /// error.  
+  /// @result - False on success.
+  ///
+  /// @see ParseRelocatableExpression, ParseParenExpr.
+  bool ParseParenRelocatableExpression(MCValue &Res);
+
   bool ParsePrimaryExpr(AsmExpr *&Res);
   bool ParseBinOpRHS(unsigned Precedence, AsmExpr *&Res);
   bool ParseParenExpr(AsmExpr *&Res);