[committed] Use DECL_P more

[Marek Polacek]

Use DECL_P where appropriate.  No functional changes.

Bootstrapped/regtested on x86_64-linux, applying to trunk.

2015-05-20  Marek Polacek  <pola...@redhat.com>

        * gimple-fold.c (fold_const_aggregate_ref_1): Use DECL_P.
        * gimplify.c (gimplify_modify_expr_rhs): Likewise.

        * c-ada-spec.c (dump_sloc): Use DECL_P.

diff --git gcc/c-family/c-ada-spec.c gcc/c-family/c-ada-spec.c
index 8d6e014..b4e159e 100644
--- gcc/c-family/c-ada-spec.c
+++ gcc/c-family/c-ada-spec.c
@@ -1629,7 +1629,7 @@ dump_sloc (pretty_printer *buffer, tree node)
 
   xloc.file = NULL;
 
-  if (TREE_CODE_CLASS (TREE_CODE (node)) == tcc_declaration)
+  if (DECL_P (node))
     xloc = expand_location (DECL_SOURCE_LOCATION (node));
   else if (EXPR_HAS_LOCATION (node))
     xloc = expand_location (EXPR_LOCATION (node));
diff --git gcc/gimple-fold.c gcc/gimple-fold.c
index 2cc5628..4bef350 100644
--- gcc/gimple-fold.c
+++ gcc/gimple-fold.c
@@ -5518,7 +5518,7 @@ fold_const_aggregate_ref_1 (tree t, tree (*valueize) 
(tree))
   if (TREE_THIS_VOLATILE (t))
     return NULL_TREE;
 
-  if (TREE_CODE_CLASS (TREE_CODE (t)) == tcc_declaration)
+  if (DECL_P (t))
     return get_symbol_constant_value (t);
 
   tem = fold_read_from_constant_string (t);
diff --git gcc/gimplify.c gcc/gimplify.c
index c5eccf0..2720d02 100644
--- gcc/gimplify.c
+++ gcc/gimplify.c
@@ -4222,7 +4222,7 @@ gimplify_modify_expr_rhs (tree *expr_p, tree *from_p, 
tree *to_p,
              {
                if (TREE_THIS_VOLATILE (t) != volatile_p)
                  {
-                   if (TREE_CODE_CLASS (TREE_CODE (t)) == tcc_declaration)
+                   if (DECL_P (t))
                      t = build_simple_mem_ref_loc (EXPR_LOCATION (*from_p),
                                                    build_fold_addr_expr (t));
                    if (REFERENCE_CLASS_P (t))

        Marek