--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr32370.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,30 @@
+/* PR middle-end/32370 */
+/* { dg-do compile { target i?86-*-* x86_64-*-* ia64-*-* } } */
+/* { dg-options "" { target ia64-*-* } } */
+/* { dg-options "-ffixed-esi" { target i?86-*-* x86_64-*-* } } */
+/* { dg-options "-mabi=sysv -ffixed-esi" { target x86_64-*-mingw* } } */
+
+#if (defined __i386__ || defined __x86_64__) && ! defined _WIN64
+# define C "=S"
+# define TYPE unsigned long
+#elif defined __ia64__ || defined _WIN64
+# define C "=a"
+# define TYPE unsigned long long
+#endif
+
+#ifdef _WIN64
+__extension__
+#endif
+unsigned int
+foo (TYPE port)
+{
+  unsigned int v;
+  __asm__ __volatile__ ("" : C (v) : "Nd" (port));	/* { dg-error "while reloading\|has impossible\|inconsistent operand constraints" } */
+  return v;
+}
+
+void
+bar (void)
+{
+  foo (0);
+}