[PR target/82823] Add testcase

[PR target/82823] Add testcase

[Jeff Law]

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So the x86 assertion failure I fixed yesterday where I didn't have a 
testcase?  Martin L has just tripped over it and filed a bug for it 
overnight.

I'm adding his testcase to the C++ regression testsuite.  I also 
retro-actively added the PR marker to the x86 commit which fixes this 
problem.


Jeff

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diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4cc2cedc0dc..0a08fe2ed5c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2017-11-03  Jeff Law  <law@redhat.com>
 
+	PR target/82823
+	* g++.dg/torture/pr82823.C: New test.
+
 	* gcc.target/i386/stack-check-12.c: New test.
 
 2017-11-03  Jakub Jelinek  <jakub@redhat.com>
diff --git a/gcc/testsuite/g++.dg/torture/pr82823.C b/gcc/testsuite/g++.dg/torture/pr82823.C
new file mode 100644
index 00000000000..dab369e7ad3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr82823.C
@@ -0,0 +1,26 @@
+// { dg-do compile }
+// { dg-additional-options "-fstack-clash-protection" }
+// { dg-require-effective-target supports_stack_clash_protection }
+
+
+class a
+{
+public:
+  ~a ();
+  int b;
+};
+class c
+{
+public:
+  a m_fn1 ();
+};
+class d
+{
+  int e ();
+  c f;
+};
+int
+d::e ()
+{
+  return f.m_fn1 ().b;
+}