diff --git a/llvm/include/llvm/IR/InlineAsm.h b/llvm/include/llvm/IR/InlineAsm.h
--- a/llvm/include/llvm/IR/InlineAsm.h
+++ b/llvm/include/llvm/IR/InlineAsm.h
@@ -434,6 +434,8 @@
       return "o";
     case InlineAsm::Constraint_v:
       return "v";
+    case InlineAsm::Constraint_A:
+      return "A";
     case InlineAsm::Constraint_Q:
       return "Q";
     case InlineAsm::Constraint_R: