[PATCH] Fix 70199

[Richard Henderson]

The problem here is that

  void* labels[] = {
    &&l0, &&l1, &&l2
  };
gets gimplified to

  labels = *.LC0;

but .LC0 is not in the set of local decls, so that when copy_forbidden is 
called during sra versioning we fail to forbid the copy.  We could set a 
different flag, but I think it's easiest to just add the artificial decl to 
where it can be seen.

Ok?


r~
        * gimplify.c (gimplify_init_constructor): Add the constant def decl
        to the function's local decls.


diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index b331e41..884482e 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -4016,6 +4016,7 @@ gimplify_init_constructor (tree *expr_p, gimple_seq 
*pre_p, gimple_seq *post_p,
 
                walk_tree (&ctor, force_labels_r, NULL, NULL);
                ctor = tree_output_constant_def (ctor);
+               add_local_decl (cfun, ctor);
                if (!useless_type_conversion_p (type, TREE_TYPE (ctor)))
                  ctor = build1 (VIEW_CONVERT_EXPR, type, ctor);
                TREE_OPERAND (*expr_p, 1) = ctor;