C++ PATCH to add test for c++/91581

[Marek Polacek]

Fixed by r277351, applying to trunk.

2019-10-25  Marek Polacek  <pola...@redhat.com>

        PR c++/91581 - ICE in exception-specification of defaulted ctor.
        * g++.dg/cpp0x/noexcept55.C: New test.

diff --git gcc/testsuite/g++.dg/cpp0x/noexcept55.C 
gcc/testsuite/g++.dg/cpp0x/noexcept55.C
new file mode 100644
index 00000000000..f46320db211
--- /dev/null
+++ gcc/testsuite/g++.dg/cpp0x/noexcept55.C
@@ -0,0 +1,8 @@
+// PR c++/91581 - ICE in exception-specification of defaulted ctor.
+// { dg-do compile { target c++11 } }
+
+struct A {
+    A() noexcept(sizeof(A)) = default;
+};
+
+A a;