[gcc(refs/vendors/ARM/heads/arm-perf-staging)] c++: Add test for PR c++/93211

[Tamar Christina]

https://gcc.gnu.org/g:51ecad3c0327418c6e20ef47c6c5a8015bb99b2c

commit 51ecad3c0327418c6e20ef47c6c5a8015bb99b2c
Author: Patrick Palka <ppalka@redhat.com>
Date:   Fri Apr 3 11:21:56 2020 -0400

    c++: Add test for PR c++/93211
    
    The fix for PR c++/90711 also fixed this PR.
    
    gcc/testsuite/ChangeLog:
    
            PR c++/93211
            PR c++/90711
            * g++.dg/template/koenig11.C: New test.

Diff:
---
 gcc/testsuite/ChangeLog                  |  6 ++++++
 gcc/testsuite/g++.dg/template/koenig11.C | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index cf20783d8a6..0a08024b277 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-03  Patrick Palka  <ppalka@redhat.com>
+
+	PR c++/93211
+	PR c++/90711
+	* g++.dg/template/koenig11.C: New test.
+
 2020-04-03  Andre Vieira  <andre.simoesdiasvieira@arm.com>
 
 	* gcc.target/arm/mve/intrinsics/mve_vector_float.c: Put -mfpu=auto back.
diff --git a/gcc/testsuite/g++.dg/template/koenig11.C b/gcc/testsuite/g++.dg/template/koenig11.C
new file mode 100644
index 00000000000..d69709bab59
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/koenig11.C
@@ -0,0 +1,11 @@
+// PR c++/93211
+// { dg-do compile { target c++11 } }
+
+template<typename T>
+void g(T);
+
+template<typename T, decltype(g(T{})) = 0>
+void f() {}
+
+template<typename T, decltype(::g(T{})) = 0>
+void f() {} // { dg-bogus "redefinition" }