1 files changed, 144 insertions, 0 deletions
diff --git a/gcc/testsuite/c-c++-common/pr66322.c b/gcc/testsuite/c-c++-common/pr66322.c
new file mode 100644
index 00000000000..eb1e9e4a2ed
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/pr66322.c
@@ -0,0 +1,144 @@
+/* PR c/66322 */
+/* { dg-do compile } */
+
+#ifndef __cplusplus
+# define bool _Bool
+# define true 1
+# define false 0
+#endif
+
+void
+nowarn (bool b)
+{
+  switch (b)
+    ;
+
+  switch (b)
+    {
+    case true:
+    case false:
+      break;
+    }
+
+  switch (b)
+    {
+    case true:
+      break;
+    }
+
+  switch (b)
+    {
+    case true:
+    default:
+      break;
+    }
+
+  switch (b)
+    {
+    case false:
+      break;
+    }
+
+  switch (b)
+    {
+    case false:
+    default:
+      break;
+    }
+
+  switch (b)
+    {
+    default:
+      break;
+    }
+
+  switch (b)
+    {
+    case false ... true:
+      break;
+    }
+
+  switch (b)
+    {
+    case 1:
+      switch (b)
+	{
+	case true:
+	default:
+	  break;
+	}
+      default:
+	break;
+    }
+}
+
+void
+warn (bool b)
+{
+  switch (b)  /* { dg-warning "switch condition has" } */
+    {
+    case true:
+    case false:
+    default:
+      break;
+    }
+
+  switch (b)  /* { dg-warning "switch condition has" } */
+    {
+    case false ... true:
+    default:
+      break;
+    }
+}
+
+void
+warn2 (int n)
+{
+  switch (n == 2)  /* { dg-warning "switch condition has" } */
+    {
+    case 0 ... 2: /* { dg-warning "upper value" "" { target c++ } } */
+    default:
+      break;
+    }
+
+  switch (n == 2)  /* { dg-warning "switch condition has" } */
+    {
+    case 1 ... 10: /* { dg-warning "upper value" "" { target c++ } } */
+    default:
+      break;
+    }
+
+  switch (n == 2) /* { dg-warning "switch condition has" } */
+    {
+      case 2: /* { dg-warning "case label" "" { target c++ } } */
+	break;
+    }
+
+  switch (n == 2) /* { dg-warning "switch condition has" } */
+    {
+      case 0:
+      case 1:
+      case -1: /* { dg-warning "case label" "" { target c++ } } */
+	break;
+    }
+
+  switch (n == 2) /* { dg-warning "switch condition has" } */
+    {
+      case -1 ... 1: /* { dg-warning "lower value" "" { target c++ } } */
+	break;
+    }
+
+  switch (n == 2) /* { dg-warning "switch condition has" } */
+    {
+      case -1 ... 0: /* { dg-warning "lower value" "" { target c++ } } */
+      default:
+	break;
+    }
+
+  switch (n == 2) /* { dg-warning "switch condition has" } */
+    {
+      case -10 ... -1: /* { dg-warning "case label" "" { target c++ } } */
+      default:
+	break;
+    }
+}