268 lines
6.6 KiB
C
268 lines
6.6 KiB
C
/* Some code common to C and ObjC front ends.
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Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "rtl.h"
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#include "insn-config.h"
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#include "integrate.h"
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#include "c-tree.h"
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#include "c-pretty-print.h"
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#include "function.h"
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#include "flags.h"
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#include "toplev.h"
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#include "diagnostic.h"
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#include "tree-inline.h"
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#include "varray.h"
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#include "ggc.h"
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#include "langhooks.h"
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#include "tree-mudflap.h"
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#include "target.h"
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#include "c-objc-common.h"
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static bool c_tree_printer (pretty_printer *, text_info *, const char *,
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int, bool, bool, bool);
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bool
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c_missing_noreturn_ok_p (tree decl)
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{
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/* A missing noreturn is not ok for freestanding implementations and
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ok for the `main' function in hosted implementations. */
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return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
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}
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/* We want to inline `extern inline' functions even if this would
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violate inlining limits. Some glibc and linux constructs depend on
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such functions always being inlined when optimizing. */
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int
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c_disregard_inline_limits (tree fn)
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{
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if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
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return 1;
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return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
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&& DECL_EXTERNAL (fn));
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}
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int
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c_cannot_inline_tree_fn (tree *fnp)
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{
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tree fn = *fnp;
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bool do_warning = (warn_inline
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&& DECL_INLINE (fn)
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&& DECL_DECLARED_INLINE_P (fn)
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&& !DECL_IN_SYSTEM_HEADER (fn));
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if (flag_really_no_inline
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&& lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
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{
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if (do_warning)
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warning (OPT_Winline, "function %q+F can never be inlined because it "
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"is suppressed using -fno-inline", fn);
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goto cannot_inline;
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}
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/* Don't auto-inline anything that might not be bound within
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this unit of translation. */
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if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn))
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{
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if (do_warning)
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warning (OPT_Winline, "function %q+F can never be inlined because it "
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"might not be bound within this unit of translation", fn);
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goto cannot_inline;
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}
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if (!function_attribute_inlinable_p (fn))
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{
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if (do_warning)
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warning (OPT_Winline, "function %q+F can never be inlined because it "
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"uses attributes conflicting with inlining", fn);
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goto cannot_inline;
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}
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return 0;
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cannot_inline:
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DECL_UNINLINABLE (fn) = 1;
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return 1;
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}
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/* Called from check_global_declarations. */
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bool
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c_warn_unused_global_decl (tree decl)
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{
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if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
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return false;
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if (DECL_IN_SYSTEM_HEADER (decl))
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return false;
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return true;
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}
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/* Initialization common to C and Objective-C front ends. */
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bool
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c_objc_common_init (void)
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{
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c_init_decl_processing ();
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if (c_common_init () == false)
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return false;
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/* These were not defined in the Objective-C front end, but I'm
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putting them here anyway. The diagnostic format decoder might
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want an enhanced ObjC implementation. */
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diagnostic_format_decoder (global_dc) = &c_tree_printer;
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/* If still unspecified, make it match -std=c99
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(allowing for -pedantic-errors). */
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if (mesg_implicit_function_declaration < 0)
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{
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if (flag_isoc99)
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mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
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else
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mesg_implicit_function_declaration = 0;
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}
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return true;
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}
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/* Called during diagnostic message formatting process to print a
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source-level entity onto BUFFER. The meaning of the format specifiers
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is as follows:
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%D: a general decl,
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%E: an identifier or expression,
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%F: a function declaration,
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%T: a type.
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These format specifiers form a subset of the format specifiers set used
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by the C++ front-end.
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Please notice when called, the `%' part was already skipped by the
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diagnostic machinery. */
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static bool
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c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
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int precision, bool wide, bool set_locus, bool hash)
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{
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tree t = va_arg (*text->args_ptr, tree);
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tree name;
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const char *n = "({anonymous})";
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c_pretty_printer *cpp = (c_pretty_printer *) pp;
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pp->padding = pp_none;
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if (precision != 0 || wide || hash)
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return false;
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if (set_locus && text->locus)
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*text->locus = DECL_SOURCE_LOCATION (t);
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switch (*spec)
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{
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case 'D':
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if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
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{
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t = DECL_DEBUG_EXPR (t);
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if (!DECL_P (t))
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{
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pp_c_expression (cpp, t);
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return true;
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}
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}
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/* FALLTHRU */
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case 'F':
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if (DECL_NAME (t))
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n = lang_hooks.decl_printable_name (t, 2);
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break;
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case 'T':
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gcc_assert (TYPE_P (t));
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name = TYPE_NAME (t);
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if (name && TREE_CODE (name) == TYPE_DECL)
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{
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if (DECL_NAME (name))
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pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
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else
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pp_type_id (cpp, t);
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return true;
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}
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else
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{
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pp_type_id (cpp, t);
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return true;
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}
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break;
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case 'E':
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if (TREE_CODE (t) == IDENTIFIER_NODE)
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n = IDENTIFIER_POINTER (t);
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else
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{
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pp_expression (cpp, t);
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return true;
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}
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break;
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default:
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return false;
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}
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pp_string (cpp, n);
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return true;
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}
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/* In C and ObjC, all decls have "C" linkage. */
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bool
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has_c_linkage (tree decl ATTRIBUTE_UNUSED)
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{
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return true;
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}
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void
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c_initialize_diagnostics (diagnostic_context *context)
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{
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pretty_printer *base = context->printer;
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c_pretty_printer *pp = XNEW (c_pretty_printer);
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memcpy (pp_base (pp), base, sizeof (pretty_printer));
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pp_c_pretty_printer_init (pp);
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context->printer = (pretty_printer *) pp;
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/* It is safe to free this object because it was previously XNEW()'d. */
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XDELETE (base);
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}
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int
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c_types_compatible_p (tree x, tree y)
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{
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return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
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}
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/* Determine if the type is a vla type for the backend. */
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bool
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c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED)
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{
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return c_vla_type_p (x);
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}
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