1 files changed, 10 insertions, 0 deletions
diff --git a/test/CodeGen/exprs.c b/test/CodeGen/exprs.c
index cc03be6..f8f2833 100644
--- a/test/CodeGen/exprs.c
+++ b/test/CodeGen/exprs.c
@@ -174,3 +174,13 @@ void f16() {
  lbl:
   ;
 }
+
+// PR13704: negative increment in i128 is not preserved.
+// CHECK: define void @f17()
+void f17() {
+  extern void extfunc(__int128);
+  __int128 x = 2;
+  x--;
+  extfunc(x);
+// CHECK: add nsw i128 %{{.}}, -1
+}