1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 4281193caf85..769601c7e633 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -1333,6 +1333,13 @@ bool LLParser::parseEnumAttribute(Attribute::AttrKind Attr, AttrBuilder &B,
     B.addDereferenceableOrNullAttr(Bytes);
     return false;
   }
+  case Attribute::UWTable: {
+    UWTableKind Kind;
+    if (parseOptionalUWTableKind(Kind))
+      return true;
+    B.addUWTableAttr(Kind);
+    return false;
+  }
   default:
     B.addAttribute(Attr);
     Lex.Lex();
@@ -1996,6 +2003,22 @@ bool LLParser::parseOptionalDerefAttrBytes(lltok::Kind AttrKind,
   return false;
 }
 
+bool LLParser::parseOptionalUWTableKind(UWTableKind &Kind) {
+  Lex.Lex();
+  Kind = UWTableKind::Default;
+  if (!EatIfPresent(lltok::lparen))
+    return false;
+  LocTy KindLoc = Lex.getLoc();
+  if (Lex.getKind() == lltok::kw_sync)
+    Kind = UWTableKind::Sync;
+  else if (Lex.getKind() == lltok::kw_async)
+    Kind = UWTableKind::Async;
+  else
+    return error(KindLoc, "expected unwind table kind");
+  Lex.Lex();
+  return parseToken(lltok::rparen, "expected ')'");
+}
+
 /// parseOptionalCommaAlign
 ///   ::=
 ///   ::= ',' align 4