1 files changed, 14 insertions, 0 deletions
diff --git a/test/Assembler/musttail-invalid-1.ll b/test/Assembler/musttail-invalid-1.ll
new file mode 100644
index 000000000000..b123a9151d3d
--- /dev/null
+++ b/test/Assembler/musttail-invalid-1.ll
@@ -0,0 +1,14 @@
+; RUN: not llvm-as < %s -o /dev/null 2>&1 | FileCheck %s
+
+; Check the error message on using ", ..." when we can't actually forward
+; varargs.
+
+%struct.A = type { i32 }
+
+declare i8* @f(i8*, ...)
+
+define i8* @f_thunk(i8* %this) {
+  %rv = musttail call i8* (i8*, ...)* @f(i8* %this, ...)
+; CHECK: error: unexpected ellipsis in argument list for musttail call in non-varargs function
+  ret i8* %rv
+}