[PATCH v1 4/6] aarch64: Add selectany attribute handling

[Evgeny Karpov <Evgeny.Karpov@microsoft.com>]

This patch extends the aarch64 attributes list with the selectany
attribute for the aarch64-w64-mingw32 target and reuses the mingw
implementation to handle it.

	* config/aarch64/aarch64.cc:
	Extend the aarch64 attributes list.
	* config/aarch64/cygming.h (SUBTARGET_ATTRIBUTE_TABLE):
	Define the selectany attribute.
---
 gcc/config/aarch64/aarch64.cc | 5 ++++-
 gcc/config/aarch64/cygming.h  | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc
index c763a8a6298..19205927430 100644
--- a/gcc/config/aarch64/aarch64.cc
+++ b/gcc/config/aarch64/aarch64.cc
@@ -855,7 +855,10 @@ static const attribute_spec aarch64_gnu_attributes[] =
 			  NULL },
   { "Advanced SIMD type", 1, 1, false, true,  false, true,  NULL, NULL },
   { "SVE type",		  3, 3, false, true,  false, true,  NULL, NULL },
-  { "SVE sizeless type",  0, 0, false, true,  false, true,  NULL, NULL }
+  { "SVE sizeless type",  0, 0, false, true,  false, true,  NULL, NULL },
+#ifdef SUBTARGET_ATTRIBUTE_TABLE
+  SUBTARGET_ATTRIBUTE_TABLE
+#endif
 };
 
 static const scoped_attribute_specs aarch64_gnu_attribute_table =
diff --git a/gcc/config/aarch64/cygming.h b/gcc/config/aarch64/cygming.h
index 0d048879311..76623153080 100644
--- a/gcc/config/aarch64/cygming.h
+++ b/gcc/config/aarch64/cygming.h
@@ -154,6 +154,9 @@ still needed for compilation.  */
     flag_stack_check = STATIC_BUILTIN_STACK_CHECK;	\
   } while (0)
 
+#define SUBTARGET_ATTRIBUTE_TABLE \
+  { "selectany", 0, 0, true, false, false, false, \
+    mingw_handle_selectany_attribute, NULL }
 
 #define SUPPORTS_ONE_ONLY 1
 
-- 
2.25.1