1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/reg-vol-struct-1.c b/gcc/testsuite/gcc.dg/reg-vol-struct-1.c
new file mode 100644
index 00000000000..7751bb4a117
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/reg-vol-struct-1.c
@@ -0,0 +1,18 @@
+/* Test cases of structures with volatile fields declared register:
+   should be allowed unless register name given but explicitly taking
+   the address forbidden.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+
+/* { dg-do compile } */
+
+struct S { volatile int field; };
+
+void
+f (void)
+{
+  register struct S a;
+  register struct S b[2];
+  register struct S c __asm__("nosuchreg"); /* { dg-error "object with volatile field" "explicit reg name" } */
+  &a; /* { dg-warning "address of register" "explicit address" } */
+  b; /* { dg-warning "address of register" "implicit address" } */
+}