1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/switch-warn-1.c b/gcc/testsuite/gcc.dg/switch-warn-1.c
new file mode 100644
index 000000000..04ca4e367
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/switch-warn-1.c
@@ -0,0 +1,47 @@
+/* { dg-do run } */
+/* { dg-options "-O0" } */
+
+extern void abort (void);
+extern void exit (int);
+
+/* Check that out-of-bounds case warnings work in the case that the
+   testing expression is promoted.  */
+int
+foo1 (unsigned char i)
+{
+  switch (i)
+    {
+    case -1:   /* { dg-warning "case label value is less than minimum value for type" } */
+      return 1;
+    case 256:  /* { dg-warning "case label value exceeds maximum value for type" } */
+      return 2;
+    default:
+      return 3;
+    }
+}
+
+/* Like above, but for case ranges that need to be satured.  */
+int
+foo2 (unsigned char i)
+{
+  switch (i)
+    {
+    case -1 ... 1:   /* { dg-warning "lower value in case label range less than minimum value for type" } */
+      return 1;
+    case 254 ... 256:  /* { dg-warning "upper value in case label range exceeds maximum value for type" } */
+      return 2;
+    default:
+      return 3;
+    }
+}
+
+int
+main (void)
+{
+  if (foo1 (10) != 3)
+    abort ();
+  if (foo2 (10) != 3)
+    abort ();
+  exit (0);
+}
+