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
@@ -443,6 +443,8 @@
       return "m";
     case InlineAsm::Constraint_o:
       return "o";
+    case InlineAsm::Constraint_A:
+      return "A";
     case InlineAsm::Constraint_v:
       return "v";
     case InlineAsm::Constraint_Q: