fix a parsing problem on instructions like:

movw	$8, (_cost_table_-L97$pb)+66(%eax)

After the parens, we could still have a binop.

llvm-svn: 94345

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -331,10 +331,9 @@ bool AsmParser::ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
 }
 
 bool AsmParser::ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
-  if (ParseParenExpr(Res, EndLoc))
-    return true;
-
-  return false;
+  Res = 0;
+  return ParseParenExpr(Res, EndLoc) ||
+         ParseBinOpRHS(1, Res, EndLoc);
 }
 
 bool AsmParser::ParseAbsoluteExpression(int64_t &Res) {

llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp

@@ -300,8 +300,8 @@ X86Operand *X86ATTAsmParser::ParseMemOperand() {
   
   // We have to disambiguate a parenthesized expression "(4+5)" from the start
   // of a memory operand with a missing displacement "(%ebx)" or "(,%eax)".  The
-  // only way to do this without lookahead is to eat the ( and see what is after
-  // it.
+  // only way to do this without lookahead is to eat the '(' and see what is
+  // after it.
   const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
   if (getLexer().isNot(AsmToken::LParen)) {
     SMLoc ExprEnd;

llvm/test/MC/AsmParser/exprs.s

@@ -60,3 +60,4 @@ n:
         nop
         
         
+        movw	$8, (42)+66(%eax)