1 files changed, 65 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-fold1.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-fold1.C
new file mode 100644
index 00000000000..414a0dacf99
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-fold1.C
@@ -0,0 +1,65 @@
+// PR c++/65642
+// { dg-do compile { target c++11 } }
+
+// Check we're able to evaluate these.
+
+#define SA(X) static_assert((X),#X)
+
+constexpr char s[] = "abc";
+constexpr int t[] = { 'a', 'b', 'c', '\0' };
+
+constexpr char
+fn1 (const char *p)
+{
+  return *(p + 1);
+}
+
+constexpr char
+fn2 (const char *p)
+{
+  return p[1];
+}
+
+constexpr int
+fn3 (const int *p)
+{
+  return *(p + 1);
+}
+
+constexpr int
+fn4 (const int *p)
+{
+  return p[1];
+}
+
+constexpr auto c1 = fn1 (&s[0]);
+constexpr auto c2 = fn1 (&s[1]);
+constexpr auto c3 = fn1 (&s[2]);
+
+SA (c1 == 'b');
+SA (c2 == 'c');
+SA (c3 == '\0');
+
+constexpr auto d1 = fn2 (&s[0]);
+constexpr auto d2 = fn2 (&s[1]);
+constexpr auto d3 = fn2 (&s[2]);
+
+SA (d1 == 'b');
+SA (d2 == 'c');
+SA (d3 == '\0');
+
+constexpr auto e1 = fn3 (&t[0]);
+constexpr auto e2 = fn3 (&t[1]);
+constexpr auto e3 = fn3 (&t[2]);
+
+SA (e1 == 'b');
+SA (e2 == 'c');
+SA (e3 == '\0');
+
+constexpr auto f1 = fn4 (&t[0]);
+constexpr auto f2 = fn4 (&t[1]);
+constexpr auto f3 = fn4 (&t[2]);
+
+SA (f1 == 'b');
+SA (f2 == 'c');
+SA (f3 == '\0');