| /* Some code common to C and ObjC front ends. |
| Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
| |
| 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 2, 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 COPYING. If not, write to the Free |
| Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "tm.h" |
| #include "tree.h" |
| #include "rtl.h" |
| #include "insn-config.h" |
| #include "integrate.h" |
| #include "c-tree.h" |
| #include "c-pretty-print.h" |
| #include "function.h" |
| #include "flags.h" |
| #include "toplev.h" |
| #include "diagnostic.h" |
| #include "tree-inline.h" |
| #include "varray.h" |
| #include "ggc.h" |
| #include "langhooks.h" |
| #include "tree-mudflap.h" |
| #include "target.h" |
| #include "c-objc-common.h" |
| |
| static bool c_tree_printer (pretty_printer *, text_info *, const char *, |
| int, bool, bool, bool); |
| |
| bool |
| c_missing_noreturn_ok_p (tree decl) |
| { |
| /* A missing noreturn is not ok for freestanding implementations and |
| ok for the `main' function in hosted implementations. */ |
| return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl)); |
| } |
| |
| /* We want to inline `extern inline' functions even if this would |
| violate inlining limits. Some glibc and linux constructs depend on |
| such functions always being inlined when optimizing. */ |
| |
| int |
| c_disregard_inline_limits (tree fn) |
| { |
| if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) |
| return 1; |
| |
| return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn) |
| /* APPLE LOCAL obey inline */ |
| && (DECL_EXTERNAL (fn) || flag_obey_inline)); |
| } |
| |
| int |
| c_cannot_inline_tree_fn (tree *fnp) |
| { |
| tree fn = *fnp; |
| bool do_warning = (warn_inline |
| && DECL_INLINE (fn) |
| && DECL_DECLARED_INLINE_P (fn) |
| && !DECL_IN_SYSTEM_HEADER (fn)); |
| |
| if (flag_really_no_inline |
| && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL) |
| { |
| if (do_warning) |
| warning (OPT_Winline, "function %q+F can never be inlined because it " |
| "is suppressed using -fno-inline", fn); |
| goto cannot_inline; |
| } |
| |
| /* Don't auto-inline anything that might not be bound within |
| this unit of translation. */ |
| if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn)) |
| { |
| if (do_warning) |
| warning (OPT_Winline, "function %q+F can never be inlined because it " |
| "might not be bound within this unit of translation", fn); |
| goto cannot_inline; |
| } |
| |
| if (!function_attribute_inlinable_p (fn)) |
| { |
| if (do_warning) |
| warning (OPT_Winline, "function %q+F can never be inlined because it " |
| "uses attributes conflicting with inlining", fn); |
| goto cannot_inline; |
| } |
| |
| return 0; |
| |
| cannot_inline: |
| DECL_UNINLINABLE (fn) = 1; |
| return 1; |
| } |
| |
| /* Called from check_global_declarations. */ |
| |
| bool |
| c_warn_unused_global_decl (tree decl) |
| { |
| if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) |
| return false; |
| if (DECL_IN_SYSTEM_HEADER (decl)) |
| return false; |
| |
| return true; |
| } |
| |
| /* Initialization common to C and Objective-C front ends. */ |
| bool |
| c_objc_common_init (void) |
| { |
| c_init_decl_processing (); |
| |
| if (c_common_init () == false) |
| return false; |
| |
| /* These were not defined in the Objective-C front end, but I'm |
| putting them here anyway. The diagnostic format decoder might |
| want an enhanced ObjC implementation. */ |
| diagnostic_format_decoder (global_dc) = &c_tree_printer; |
| |
| /* If still unspecified, make it match -std=c99 |
| (allowing for -pedantic-errors). */ |
| if (mesg_implicit_function_declaration < 0) |
| { |
| if (flag_isoc99) |
| mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1; |
| else |
| mesg_implicit_function_declaration = 0; |
| } |
| |
| return true; |
| } |
| |
| /* Called during diagnostic message formatting process to print a |
| source-level entity onto BUFFER. The meaning of the format specifiers |
| is as follows: |
| %D: a general decl, |
| %E: an identifier or expression, |
| %F: a function declaration, |
| %T: a type. |
| |
| These format specifiers form a subset of the format specifiers set used |
| by the C++ front-end. |
| Please notice when called, the `%' part was already skipped by the |
| diagnostic machinery. */ |
| static bool |
| c_tree_printer (pretty_printer *pp, text_info *text, const char *spec, |
| int precision, bool wide, bool set_locus, bool hash) |
| { |
| tree t = va_arg (*text->args_ptr, tree); |
| tree name; |
| const char *n = "({anonymous})"; |
| c_pretty_printer *cpp = (c_pretty_printer *) pp; |
| pp->padding = pp_none; |
| |
| if (precision != 0 || wide || hash) |
| return false; |
| |
| if (set_locus && text->locus) |
| *text->locus = DECL_SOURCE_LOCATION (t); |
| |
| switch (*spec) |
| { |
| case 'D': |
| if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t)) |
| { |
| t = DECL_DEBUG_EXPR (t); |
| if (!DECL_P (t)) |
| { |
| pp_c_expression (cpp, t); |
| return true; |
| } |
| } |
| /* FALLTHRU */ |
| |
| case 'F': |
| if (DECL_NAME (t)) |
| n = lang_hooks.decl_printable_name (t, 2); |
| break; |
| |
| case 'T': |
| gcc_assert (TYPE_P (t)); |
| name = TYPE_NAME (t); |
| |
| if (name && TREE_CODE (name) == TYPE_DECL) |
| { |
| if (DECL_NAME (name)) |
| pp_string (cpp, lang_hooks.decl_printable_name (name, 2)); |
| else |
| pp_type_id (cpp, t); |
| return true; |
| } |
| else |
| { |
| pp_type_id (cpp, t); |
| return true; |
| } |
| break; |
| |
| case 'E': |
| if (TREE_CODE (t) == IDENTIFIER_NODE) |
| n = IDENTIFIER_POINTER (t); |
| else |
| { |
| pp_expression (cpp, t); |
| return true; |
| } |
| break; |
| |
| default: |
| return false; |
| } |
| |
| pp_string (cpp, n); |
| return true; |
| } |
| |
| /* In C and ObjC, all decls have "C" linkage. */ |
| bool |
| has_c_linkage (tree decl ATTRIBUTE_UNUSED) |
| { |
| return true; |
| } |
| |
| void |
| c_initialize_diagnostics (diagnostic_context *context) |
| { |
| pretty_printer *base = context->printer; |
| c_pretty_printer *pp = XNEW (c_pretty_printer); |
| memcpy (pp_base (pp), base, sizeof (pretty_printer)); |
| pp_c_pretty_printer_init (pp); |
| context->printer = (pretty_printer *) pp; |
| |
| /* It is safe to free this object because it was previously XNEW()'d. */ |
| XDELETE (base); |
| } |
| |
| int |
| c_types_compatible_p (tree x, tree y) |
| { |
| return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y)); |
| } |
| |
| /* Determine if the type is a vla type for the backend. */ |
| |
| bool |
| c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED) |
| { |
| return c_vla_type_p (x); |
| } |