4 files changed, 93 insertions, 2 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8918976..9092cba 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2014-05-09  Florian Weimer  <fweimer@redhat.com>
+
+	* gcc.dg/fstack-protector-strong.c: Add coverage for return slots.
+	* g++.dg/fstack-protector-strong.C: Likewise.
+	* gcc.target/i386/ssp-strong-reg.c: New file.
+
 2014-05-09  Georg-Johann Lay  <avr@gjlay.de>
 
 	PR target/61055
diff --git a/gcc/testsuite/g++.dg/fstack-protector-strong.C b/gcc/testsuite/g++.dg/fstack-protector-strong.C
index a4f0f81..5a820ed 100644
--- a/gcc/testsuite/g++.dg/fstack-protector-strong.C
+++ b/gcc/testsuite/g++.dg/fstack-protector-strong.C
@@ -32,4 +32,52 @@ int foo2 ()
   return global_func (a);
 }
 
-/* { dg-final { scan-assembler-times "stack_chk_fail" 2 } } */
+/* Frame addressed exposed through return slot. */
+
+struct B
+{
+  /* Discourage passing this struct in registers. */
+  int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
+  int method ();
+  B return_slot();
+};
+
+B global_func ();
+void noop ();
+
+int foo3 ()
+{
+  return global_func ().a1;
+}
+
+int foo4 ()
+{
+  try {
+    noop ();
+    return 0;
+  } catch (...) {
+    return global_func ().a1;
+  }
+}
+
+int foo5 ()
+{
+  try {
+    return global_func ().a1;
+  } catch (...) {
+    return 0;
+  }
+}
+
+int foo6 ()
+{
+  B b;
+  return b.method ();
+}
+
+int foo7 (B *p)
+{
+  return p->return_slot ().a1;
+}
+
+/* { dg-final { scan-assembler-times "stack_chk_fail" 7 } } */
diff --git a/gcc/testsuite/gcc.dg/fstack-protector-strong.c b/gcc/testsuite/gcc.dg/fstack-protector-strong.c
index 7c232ff..da33abb 100644
--- a/gcc/testsuite/gcc.dg/fstack-protector-strong.c
+++ b/gcc/testsuite/gcc.dg/fstack-protector-strong.c
@@ -131,4 +131,22 @@ foo10 ()
   return bb.three;
 }
 
-/* { dg-final { scan-assembler-times "stack_chk_fail" 10 } } */
+struct B
+{
+  /* Discourage passing this struct in registers. */
+  int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10;
+};
+
+struct B global3 (void);
+
+int foo11 ()
+{
+  return global3 ().a1;
+}
+
+void foo12 ()
+{
+  global3 ();
+}
+
+/* { dg-final { scan-assembler-times "stack_chk_fail" 12 } } */
diff --git a/gcc/testsuite/gcc.target/i386/ssp-strong-reg.c b/gcc/testsuite/gcc.target/i386/ssp-strong-reg.c
new file mode 100644
index 0000000..9fe5664
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/ssp-strong-reg.c
@@ -0,0 +1,19 @@
+/* Test that structs returned in registers do not lead to
+   instrumentation with -fstack-protector-strong.  */
+
+/* { dg-do compile { target { ! { ia32 } } } } */
+/* { dg-options "-O2 -fstack-protector-strong" } */
+
+struct S {
+  int a;
+  int b;
+};
+
+struct S f (void);
+
+int g (void)
+{
+  return f ().a;
+}
+
+/* { dg-final { scan-assembler-times "stack_chk_fail" 0 } } */