From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 gcc/testsuite/gcc.dg/nrv1.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/nrv1.c

(limited to 'gcc/testsuite/gcc.dg/nrv1.c')

diff --git a/gcc/testsuite/gcc.dg/nrv1.c b/gcc/testsuite/gcc.dg/nrv1.c
new file mode 100644
index 000000000..ca700924a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/nrv1.c
@@ -0,0 +1,28 @@
+/* Test that the NRV optimization doesn't cause a1 to change too soon.  This
+   is equivalent to c++/19317.  */
+/* { dg-do run } */
+
+void abort (void);
+
+struct A
+{
+  int i[100];
+};
+
+struct A a1;
+
+struct A f ()
+{
+  struct A a2;
+  a2.i[0] = 42;
+  /* a1.i[0] should still be 0 until we return. */
+  if (a1.i[0] != 0)
+    abort ();
+  return a2;
+}
+
+int main()
+{
+  a1 = f();
+  return 0;
+}
-- 
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