1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/switch3.C b/gcc/testsuite/g++.dg/opt/switch3.C
new file mode 100644
index 00000000000..643cac3235b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/switch3.C
@@ -0,0 +1,16 @@
+// PR c++/20023
+// { dg-do compile }
+// { dg-options "-O2" }
+
+void f (void);
+typedef __SIZE_TYPE__ size_t;
+void g (void *a)
+{
+  size_t b = (size_t) a;
+  switch (b)
+  {
+    case 1:
+    f ();
+    break;
+  }
+}