--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr37438.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,21 @@
+/* PR target/37438 */
+/* { dg-do compile } */
+/* { dg-options "-Os" } */
+/* { dg-options "-Os -march=i486" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
+
+extern int bar (unsigned long long int);
+extern int baz (const char *, unsigned int, unsigned short);
+
+int
+foo (unsigned long long int x)
+{
+  return (x & 0xff) | ((unsigned int) (x >> 12) & ~0xff);
+}
+
+int
+test (const char *v, unsigned int w, unsigned long long int x)
+{
+  unsigned short k;
+  k = ((bar (x) & 0xff) << 8) | (foo (x) & 0xff);
+  return baz (v, w, k);
+}