From 85e5e340bed7df53a521af7e578d7faf830f40c1 Mon Sep 17 00:00:00 2001
From: Richard Guenther <rguenther@suse.de>
Date: Tue, 13 Jul 2010 13:31:26 +0000
Subject: [PATCH] re PR c++/36960 (Reference variable in virtually inherited
 base corrupted under optimization)

2010-07-13  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/36960
	* g++.dg/torture/pr36960.C: New testcase.

From-SVN: r162141
---
 gcc/testsuite/ChangeLog                |  5 +++++
 gcc/testsuite/g++.dg/torture/pr36960.C | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/torture/pr36960.C

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 186a4c613f4..fe67559ae1e 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-13  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/36960
+	* g++.dg/torture/pr36960.C: New testcase.
+
 2010-07-13  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/44908
diff --git a/gcc/testsuite/g++.dg/torture/pr36960.C b/gcc/testsuite/g++.dg/torture/pr36960.C
new file mode 100644
index 00000000000..280a6755d95
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr36960.C
@@ -0,0 +1,22 @@
+// { dg-do run }
+
+struct Lower {
+    const int& ref;
+    Lower(const int& ref) : ref(ref) { }
+};
+struct Middle : public virtual Lower {
+    Middle(const int& ref) : Lower(ref) { }
+};
+struct Upper : public Middle {
+    Upper(const int& ref) : Lower(ref), Middle(ref) { }
+    int get() { return ref; }
+};
+extern "C" void abort (void);
+int main()
+{
+  int i = 0;
+  Upper upper(i);
+  if (upper.get() != 0)
+    abort ();
+  return 0;
+}