From 1bc5aee63eb72b341f506ad058502cd0361f0d10 Mon Sep 17 00:00:00 2001 From: Ben Cheng Date: Tue, 25 Mar 2014 22:37:19 -0700 Subject: Initial checkin of GCC 4.9.0 from trunk (r208799). Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba --- gcc-4.9/gcc/cp/cp-objcp-common.c | 324 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 324 insertions(+) create mode 100644 gcc-4.9/gcc/cp/cp-objcp-common.c (limited to 'gcc-4.9/gcc/cp/cp-objcp-common.c') 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 + +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 +. */ + +#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 // 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" -- cgit v1.2.3