PR c/54391 - transparent_union typedef'ing inconsistent

gcc/testsuite/ChangeLog:
	* gcc.dg/transparent-union-6.c: New.

From-SVN: r265024

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 2100938..b63373c 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,10 @@
 2018-10-10  Martin Sebor  <msebor@redhat.com>
 
+       PR c/54391
+       * gcc.dg/transparent-union-6.c: New.
+
+2018-10-10  Martin Sebor  <msebor@redhat.com>
+
        * gcc.c-torture/execute/memchr-1.c: Avoid assuming 4-byte wchar_t.
        Add a test for 2-byte wchar_t.
        * gcc.dg/builtin-memchr.c: New test.

diff --git a/gcc/testsuite/gcc.dg/transparent-union-6.c b/gcc/testsuite/gcc.dg/transparent-union-6.c
new file mode 100644 (file)
index 0000000..dcad69b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/transparent-union-6.c
@@ -0,0 +1,17 @@
+/* PR c/54391 - transparent_union typedef'ing inconsistent
+   { dg-do compile }
+   { dg-options "-Wall" } */
+
+typedef union m30_u m30_t;
+
+union __attribute__((transparent_union)) m30_u {
+  int u;
+};
+
+double make_double (m30_t);
+
+double f (void)
+{
+  int bar = 17;
+  return make_double (bar);
+}