The code in aarch64_lookup_shared_state_flags all C++11 attributes on the 
function type
had a namespace associated with them. But with the addition of 
reproducible/unsequenced,
this was no longer true.
This is the simple fix to ignore attributes in the global namespace since we 
are looking
for ones in the `arm` namespace instead.

Built and tested for aarch64-linux-gnu.

gcc/ChangeLog:

        * config/aarch64/aarch64.cc (aarch64_lookup_shared_state_flags): Ignore
        attributes in the global namespace.

Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
---
 gcc/config/aarch64/aarch64.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index 27e24ba70ab..3f7bc572edc 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -597,6 +597,10 @@ aarch64_lookup_shared_state_flags (tree attrs, const char 
*state_name)
       if (!cxx11_attribute_p (attr))
        continue;
 
+      /* Skip the attributes in the global namespace. */
+      if (!TREE_PURPOSE (TREE_PURPOSE (attr)))
+       continue;
+
       auto ns = IDENTIFIER_POINTER (TREE_PURPOSE (TREE_PURPOSE (attr)));
       if (strcmp (ns, "arm") != 0)
        continue;
-- 
2.43.0

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