GCC: Add support for named initializers for anonymous structs/unions.

This is a C11 feature that is starting to get used in places such as Mesa.
This implementation takes a different approach to upstream and is
therefore not covered by GPLv3.

Obtained from:	OpenBSD (CVS rev. 1.2)
MFC after:	3 weeks

1 files changed, 10 insertions, 0 deletions

diff --git a/contrib/gcc/c-typeck.c b/contrib/gcc/c-typeck.c
index 0101176..0e2e907 100644
--- a/contrib/gcc/c-typeck.c
+++ b/contrib/gcc/c-typeck.c
@@ -6041,6 +6041,7 @@ set_init_index (tree first, tree last)
 void
 set_init_label (tree fieldname)
 {
+  tree anon = NULL_TREE;
   tree tail;
 
   if (set_designator (0))
@@ -6058,6 +6059,15 @@ set_init_label (tree fieldname)
   for (tail = TYPE_FIELDS (constructor_type); tail;
        tail = TREE_CHAIN (tail))
     {
+      if (DECL_NAME (tail) == NULL_TREE
+	  && (TREE_CODE (TREE_TYPE (tail)) == RECORD_TYPE
+	      || TREE_CODE (TREE_TYPE (tail)) == UNION_TYPE))
+	{
+	  anon = lookup_field (tail, fieldname);
+	  if (anon)
+	    break;
+	}
+
       if (DECL_NAME (tail) == fieldname)
 	break;
     }