--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr78547.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,18 @@
+/* PR rtl-optimization/78547 */
+/* { dg-do compile { target int128 } } */
+/* { dg-options "-Os -g -freorder-blocks-algorithm=simple -Wno-psabi" } */
+/* { dg-additional-options "-mstringop-strategy=libcall" { target i?86-*-* x86_64-*-* } } */
+
+typedef unsigned __int128 u128;
+typedef unsigned __int128 V __attribute__ ((vector_size (64)));
+
+V
+foo (u128 a, u128 b, u128 c, V d)
+{
+  V e = (V) {a};
+  V f = e & 1;
+  e = 0 != e;
+  c = c;
+  f = f << ((V) {c} & 7);
+  return f + e;
+}