1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/utf-cvt-char8_t.C b/gcc/testsuite/g++.dg/ext/utf-cvt-char8_t.C
new file mode 100644
index 00000000000..0170b36da14
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/utf-cvt-char8_t.C
@@ -0,0 +1,39 @@
+/* Contributed by Kris Van Hees <kris.van.hees@oracle.com> */
+/* Test the char8_t promotion rules. */
+/* { dg-do compile { target c++11 } } */
+/* { dg-options "-fchar8_t -Wall -Wconversion -Wsign-conversion -Wsign-promo" } */
+
+extern void f_c (char);
+extern void fsc (signed char);
+extern void fuc (unsigned char);
+extern void f_s (short);
+extern void fss (signed short);
+extern void fus (unsigned short);
+extern void f_i (int);
+extern void fsi (signed int);
+extern void fui (unsigned int);
+extern void f_l (long);
+extern void fsl (signed long);
+extern void ful (unsigned long);
+extern void f_ll (long long);
+extern void fsll (signed long long);
+extern void full (unsigned long long);
+
+void m(char8_t c)
+{
+    f_c (c);	/* { dg-warning "change the sign" } */
+    fsc (c);	/* { dg-warning "change the sign" } */
+    fuc (c);
+    f_s (c);
+    fss (c);
+    fus (c);
+    f_i (c);
+    fsi (c);
+    fui (c);
+    f_l (c);
+    fsl (c);
+    ful (c);
+    f_ll (c);
+    fsll (c);
+    full (c);
+}