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/g++.dg/opt/alias1.C | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/opt/alias1.C

(limited to 'gcc/testsuite/g++.dg/opt/alias1.C')

diff --git a/gcc/testsuite/g++.dg/opt/alias1.C b/gcc/testsuite/g++.dg/opt/alias1.C
new file mode 100644
index 000000000..4836c5be0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/alias1.C
@@ -0,0 +1,25 @@
+// Test that type punning using an anonymous union works with strict aliasing.
+// { dg-do run }
+// { dg-options "-O2 -fstrict-aliasing" }
+
+extern "C" void abort ();
+
+void f (long i)
+{
+  union
+  {
+    long ui;
+    float uf[20];
+  };
+
+  ui = i;
+  if (uf[0] != 42.0)
+    abort ();
+}
+
+int main ()
+{
+  union U { long i; float f[20]; } u;
+  u.f[0] = 42.0;
+  f (u.i);
+}
-- 
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