wrap-delay.c: New test.

2015-12-07  Steve Ellcey  <sellcey@imgtec.com>

	* gcc.target/mips/wrap-delay.c: New test.

From-SVN: r231383

gcc/testsuite/ChangeLog

+2015-12-07  Steve Ellcey  <sellcey@imgtec.com>
+
+	* gcc.target/mips/wrap-delay.c: New test.
+
 2015-12-07  Jason Merrill  <jason@redhat.com>
 
 	* lib/g++.exp: Also find -std list in GXX_TESTSUITE_STDS

gcc/testsuite/gcc.target/mips/wrap-delay.c

+/* { dg-do compile } */
+/* { dg-options "-g -mframe-header-opt -mbranch-likely" } */
+
+/* GCC was generating an ICE with the above options and -Os because
+   it was putting the save of $31 in two annulled delay slots but
+   there was only one restore since only one of the two saves could be
+   executed.  This was correct code but it confused dwarf2cfi and
+   caused it to ICE when using the -g option.  */
+
+
+enum demangle_component_type
+{
+	DEMANGLE_COMPONENT_TRINARY_ARG2,
+};
+struct demangle_component
+{
+  enum demangle_component_type type;
+};
+struct d_info
+{
+  int next_comp;
+  int num_comps;
+};
+struct demangle_component * d_make_empty (struct d_info *di)
+{
+  if (di->next_comp >= di->num_comps) return ((void *)0);
+  ++di->next_comp;
+}
+struct demangle_component *d_make_comp (
+	struct d_info *di,
+	enum demangle_component_type type,
+	struct demangle_component *left)
+{
+  struct demangle_component *p;
+  switch (type)
+    {
+    case DEMANGLE_COMPONENT_TRINARY_ARG2:
+      if (left == ((void *)0)) return ((void *)0);
+    }
+  p = d_make_empty (di);
+  p->type = type;
+}