Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 324 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/cp/cp-objcp-common.c b/gcc-4.9/gcc/cp/cp-objcp-common.c
new file mode 100644
index 000000000..aa0ff839c
--- /dev/null
+++ b/gcc-4.9/gcc/cp/cp-objcp-common.c
@@ -0,0 +1,324 @@
+/* Some code common to C++ and ObjC++ front ends.
+   Copyright (C) 2004-2014 Free Software Foundation, Inc.
+   Contributed by Ziemowit Laski  <zlaski@apple.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "cp-tree.h"
+#include "c-family/c-common.h"
+#include "langhooks.h"
+#include "langhooks-def.h"
+#include "diagnostic.h"
+#include "debug.h"
+#include "cxx-pretty-print.h"
+#include "cp-objcp-common.h"
+
+#include <new>                       // For placement new.
+
+/* Special routine to get the alias set for C++.  */
+
+alias_set_type
+cxx_get_alias_set (tree t)
+{
+  if (IS_FAKE_BASE_TYPE (t))
+    /* The base variant of a type must be in the same alias set as the
+       complete type.  */
+    return get_alias_set (TYPE_CONTEXT (t));
+
+  /* Punt on PMFs until we canonicalize functions properly.  */
+  if (TYPE_PTRMEMFUNC_P (t)
+      || (POINTER_TYPE_P (t)
+	  && TYPE_PTRMEMFUNC_P (TREE_TYPE (t))))
+    return 0;
+
+  return c_common_get_alias_set (t);
+}
+
+/* Called from check_global_declarations.  */
+
+bool
+cxx_warn_unused_global_decl (const_tree decl)
+{
+  if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
+    return false;
+  if (DECL_IN_SYSTEM_HEADER (decl))
+    return false;
+
+  /* Const variables take the place of #defines in C++.  */
+  if (VAR_P (decl) && TREE_READONLY (decl))
+    return false;
+
+  return true;
+}
+
+/* Langhook for tree_size: determine size of our 'x' and 'c' nodes.  */
+size_t
+cp_tree_size (enum tree_code code)
+{
+  switch (code)
+    {
+    case PTRMEM_CST:		return sizeof (struct ptrmem_cst);
+    case BASELINK:		return sizeof (struct tree_baselink);
+    case TEMPLATE_PARM_INDEX:	return sizeof (template_parm_index);
+    case DEFAULT_ARG:		return sizeof (struct tree_default_arg);
+    case DEFERRED_NOEXCEPT:	return sizeof (struct tree_deferred_noexcept);
+    case OVERLOAD:		return sizeof (struct tree_overload);
+    case STATIC_ASSERT:         return sizeof (struct tree_static_assert);
+    case TYPE_ARGUMENT_PACK:
+    case TYPE_PACK_EXPANSION:
+      return sizeof (struct tree_common);
+
+    case NONTYPE_ARGUMENT_PACK:
+    case EXPR_PACK_EXPANSION:
+      return sizeof (struct tree_exp);
+
+    case ARGUMENT_PACK_SELECT:
+      return sizeof (struct tree_argument_pack_select);
+
+    case TRAIT_EXPR:
+      return sizeof (struct tree_trait_expr);
+
+    case LAMBDA_EXPR:           return sizeof (struct tree_lambda_expr);
+
+    case TEMPLATE_INFO:         return sizeof (struct tree_template_info);
+
+    case USERDEF_LITERAL:	return sizeof (struct tree_userdef_literal);
+
+    default:
+      gcc_unreachable ();
+    }
+  /* NOTREACHED */
+}
+
+/* Returns true if T is a variably modified type, in the sense of C99.
+   FN is as passed to variably_modified_p.
+   This routine needs only check cases that cannot be handled by the
+   language-independent logic in tree.c.  */
+
+bool
+cp_var_mod_type_p (tree type, tree fn)
+{
+  /* If TYPE is a pointer-to-member, it is variably modified if either
+     the class or the member are variably modified.  */
+  if (TYPE_PTRMEM_P (type))
+    return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn)
+	    || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type),
+					 fn));
+
+  /* All other types are not variably modified.  */
+  return false;
+}
+
+/* Construct a C++-aware pretty-printer for CONTEXT.  It is assumed
+   that CONTEXT->printer is an already constructed basic pretty_printer.  */
+void
+cxx_initialize_diagnostics (diagnostic_context *context)
+{
+  c_common_initialize_diagnostics (context);
+
+  pretty_printer *base = context->printer;
+  cxx_pretty_printer *pp = XNEW (cxx_pretty_printer);
+  context->printer = new (pp) cxx_pretty_printer ();
+
+  /* It is safe to free this object because it was previously XNEW()'d.  */
+  base->~pretty_printer ();
+  XDELETE (base);
+}
+
+/* This compares two types for equivalence ("compatible" in C-based languages).
+   This routine should only return 1 if it is sure.  It should not be used
+   in contexts where erroneously returning 0 causes problems.  */
+
+int
+cxx_types_compatible_p (tree x, tree y)
+{
+  return same_type_ignoring_top_level_qualifiers_p (x, y);
+}
+
+/* Return true if DECL is explicit member function.  */
+
+bool
+cp_function_decl_explicit_p (tree decl)
+{
+  return (decl
+	  && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl))
+	  && DECL_NONCONVERTING_P (decl));
+}
+
+/* Stubs to keep c-opts.c happy.  */
+void
+push_file_scope (void)
+{
+}
+
+void
+pop_file_scope (void)
+{
+}
+
+/* c-pragma.c needs to query whether a decl has extern "C" linkage.  */
+bool
+has_c_linkage (const_tree decl)
+{
+  return DECL_EXTERN_C_P (decl);
+}
+
+static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map)))
+     htab_t shadowed_var_for_decl;
+
+/* Lookup a shadowed var for FROM, and return it if we find one.  */
+
+tree
+decl_shadowed_for_var_lookup (tree from)
+{
+  struct tree_decl_map *h, in;
+  in.base.from = from;
+
+  h = (struct tree_decl_map *)
+      htab_find_with_hash (shadowed_var_for_decl, &in, DECL_UID (from));
+  if (h)
+    return h->to;
+  return NULL_TREE;
+}
+
+/* Insert a mapping FROM->TO in the shadowed var hashtable.  */
+
+void
+decl_shadowed_for_var_insert (tree from, tree to)
+{
+  struct tree_decl_map *h;
+  void **loc;
+
+  h = ggc_alloc_tree_decl_map ();
+  h->base.from = from;
+  h->to = to;
+  loc = htab_find_slot_with_hash (shadowed_var_for_decl, h, DECL_UID (from),
+				  INSERT);
+  *(struct tree_decl_map **) loc = h;
+}
+
+void
+init_shadowed_var_for_decl (void)
+{
+  shadowed_var_for_decl = htab_create_ggc (512, tree_decl_map_hash,
+					   tree_decl_map_eq, 0);
+}
+
+/* Return true if stmt can fall through.  Used by block_may_fallthru
+   default case.  */
+
+bool
+cxx_block_may_fallthru (const_tree stmt)
+{
+  switch (TREE_CODE (stmt))
+    {
+    case EXPR_STMT:
+      return block_may_fallthru (EXPR_STMT_EXPR (stmt));
+
+    case THROW_EXPR:
+      return false;
+
+    default:
+      return true;
+    }
+}
+
+void
+cp_common_init_ts (void)
+{
+  MARK_TS_DECL_NON_COMMON (NAMESPACE_DECL);
+  MARK_TS_DECL_NON_COMMON (USING_DECL);
+  MARK_TS_DECL_NON_COMMON (TEMPLATE_DECL);
+
+  MARK_TS_COMMON (TEMPLATE_TEMPLATE_PARM);
+  MARK_TS_COMMON (TEMPLATE_TYPE_PARM);
+  MARK_TS_COMMON (TEMPLATE_PARM_INDEX);
+  MARK_TS_COMMON (OVERLOAD);
+  MARK_TS_COMMON (TEMPLATE_INFO);
+  MARK_TS_COMMON (TYPENAME_TYPE);
+  MARK_TS_COMMON (TYPEOF_TYPE);
+  MARK_TS_COMMON (UNDERLYING_TYPE);
+  MARK_TS_COMMON (BASELINK);
+  MARK_TS_COMMON (TYPE_PACK_EXPANSION);
+  MARK_TS_COMMON (TYPE_ARGUMENT_PACK);
+  MARK_TS_COMMON (DECLTYPE_TYPE);
+  MARK_TS_COMMON (BOUND_TEMPLATE_TEMPLATE_PARM);
+  MARK_TS_COMMON (UNBOUND_CLASS_TEMPLATE);
+
+  MARK_TS_TYPED (EXPR_PACK_EXPANSION);
+  MARK_TS_TYPED (SWITCH_STMT);
+  MARK_TS_TYPED (IF_STMT);
+  MARK_TS_TYPED (FOR_STMT);
+  MARK_TS_TYPED (RANGE_FOR_STMT);
+  MARK_TS_TYPED (AGGR_INIT_EXPR);
+  MARK_TS_TYPED (EXPR_STMT);
+  MARK_TS_TYPED (EH_SPEC_BLOCK);
+  MARK_TS_TYPED (CLEANUP_STMT);
+  MARK_TS_TYPED (SCOPE_REF);
+  MARK_TS_TYPED (CAST_EXPR);
+  MARK_TS_TYPED (NON_DEPENDENT_EXPR);
+  MARK_TS_TYPED (MODOP_EXPR);
+  MARK_TS_TYPED (TRY_BLOCK);
+  MARK_TS_TYPED (THROW_EXPR);
+  MARK_TS_TYPED (HANDLER);
+  MARK_TS_TYPED (REINTERPRET_CAST_EXPR);
+  MARK_TS_TYPED (CONST_CAST_EXPR);
+  MARK_TS_TYPED (STATIC_CAST_EXPR);
+  MARK_TS_TYPED (DYNAMIC_CAST_EXPR);
+  MARK_TS_TYPED (IMPLICIT_CONV_EXPR);
+  MARK_TS_TYPED (TEMPLATE_ID_EXPR);
+  MARK_TS_TYPED (ARROW_EXPR);
+  MARK_TS_TYPED (SIZEOF_EXPR);
+  MARK_TS_TYPED (ALIGNOF_EXPR);
+  MARK_TS_TYPED (AT_ENCODE_EXPR);
+  MARK_TS_TYPED (UNARY_PLUS_EXPR);
+  MARK_TS_TYPED (TRAIT_EXPR);
+  MARK_TS_TYPED (TYPE_ARGUMENT_PACK);
+  MARK_TS_TYPED (NOEXCEPT_EXPR);
+  MARK_TS_TYPED (NONTYPE_ARGUMENT_PACK);
+  MARK_TS_TYPED (WHILE_STMT);
+  MARK_TS_TYPED (NEW_EXPR);
+  MARK_TS_TYPED (VEC_NEW_EXPR);
+  MARK_TS_TYPED (BREAK_STMT);
+  MARK_TS_TYPED (MEMBER_REF);
+  MARK_TS_TYPED (DOTSTAR_EXPR);
+  MARK_TS_TYPED (DO_STMT);
+  MARK_TS_TYPED (DELETE_EXPR);
+  MARK_TS_TYPED (VEC_DELETE_EXPR);
+  MARK_TS_TYPED (CONTINUE_STMT);
+  MARK_TS_TYPED (TAG_DEFN);
+  MARK_TS_TYPED (PSEUDO_DTOR_EXPR);
+  MARK_TS_TYPED (TYPEID_EXPR);
+  MARK_TS_TYPED (MUST_NOT_THROW_EXPR);
+  MARK_TS_TYPED (STMT_EXPR);
+  MARK_TS_TYPED (OFFSET_REF);
+  MARK_TS_TYPED (OFFSETOF_EXPR);
+  MARK_TS_TYPED (PTRMEM_CST);
+  MARK_TS_TYPED (EMPTY_CLASS_EXPR);
+  MARK_TS_TYPED (VEC_INIT_EXPR);
+  MARK_TS_TYPED (USING_STMT);
+  MARK_TS_TYPED (LAMBDA_EXPR);
+  MARK_TS_TYPED (CTOR_INITIALIZER);
+  MARK_TS_TYPED (ARRAY_NOTATION_REF);
+}
+
+#include "gt-cp-cp-objcp-common.h"