--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/switch-1.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,110 @@
+/* { dg-do compile { target { { x86_64-*-* aarch64-*-* ia64-*-* powerpc64-*-* } && lp64 } } } */
+/* { dg-options "-O2 -fdump-tree-switchlower1 --param case-values-threshold=4" } */
+
+int global;
+
+int foo (int x)
+{
+  switch (x) {
+    case 0:
+    case 10:
+    case 1000:
+    case 1010:
+    case 1025 ... 1030:
+      return 1;
+    default:
+      return 0;
+  }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: 0 10 BT:1000-1030" "switchlower1" } } */
+
+int foo2 (int x)
+{
+  switch (x) {
+    case -100:
+    case 100:
+    case 1000:
+    case 10000:
+    case 100000:
+      return 1;
+    default:
+      return 0;
+  }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: -100 100 1000 10000 100000" "switchlower1" } } */
+
+int foo3 (int x)
+{
+  switch (x) {
+    case 0:
+    case 10:
+    case 20:
+      global += 1;
+      return 3;
+    case 30:
+    case 33 ... 55:
+    case 57:
+      return 4;
+    case 60 ... 62:
+      return 1;
+    default:
+      return 0;
+  }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: JT:0-62" "switchlower1" } } */
+
+int foo4 (int x)
+{
+  switch (x) {
+    case -100:
+    case 10:
+    case 20:
+      global += 1;
+      return 3;
+    case 30:
+    case 33 ... 55:
+    case 57:
+      return 4;
+    case 60 ... 62:
+      return 1;
+    case 600 ... 700:
+      return 12;
+    default:
+      return 0;
+  }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: -100 JT:10-62 600-700" "switchlower1" } } */
+
+int foo5 (int x)
+{
+  switch (x) {
+    case 10:
+    case 20:
+      global += 1;
+      return 3;
+    case 30:
+    case 33 ... 55:
+    case 57:
+      return 4;
+    case 60 ... 62:
+      return 1;
+    case 600 ... 700:
+      return 12;
+    case 1000 ... 1010:
+    case 1012:
+      return 333;
+    case 1019:
+    case 1021:
+      return 9;
+    case 111111:
+      return 3;
+    default:
+      return 0;
+  }
+}
+
+/* { dg-final { scan-tree-dump ";; GIMPLE switch case clusters: JT:10-62 600-700 JT:1000-1021 111111" "switchlower1" } } */