X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Fc-objc-common.c;h=fccc2635fa8e52f0736e0150df9f88e241cfe088;hp=6c0aef673f70fd5d7bd5617727853f166fcf0b0a;hb=7d9a1be1374570f276af668f5e116424646dd18e;hpb=c31da6e7ee76fb3e31316d408f4ac94dd07b0ead diff --git a/gcc/c-objc-common.c b/gcc/c-objc-common.c index 6c0aef673f7..fccc2635fa8 100644 --- a/gcc/c-objc-common.c +++ b/gcc/c-objc-common.c @@ -1,11 +1,12 @@ /* Some code common to C and ObjC front ends. - Copyright (C) 2001 Free Software Foundation, Inc. + Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, + 2009, 2010 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 +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 @@ -14,392 +15,184 @@ 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, 59 Temple Place - Suite 330, Boston, MA -02111-1307, USA. */ +along with GCC; see the file COPYING3. If not see +. */ #include "config.h" #include "system.h" +#include "coretypes.h" #include "tree.h" -#include "rtl.h" -#include "insn-config.h" -#include "integrate.h" -#include "expr.h" #include "c-tree.h" -#include "function.h" +#include "intl.h" +#include "c-pretty-print.h" #include "flags.h" -#include "toplev.h" #include "diagnostic.h" -#include "tree-inline.h" -#include "varray.h" -#include "ggc.h" +#include "tree-pretty-print.h" #include "langhooks.h" +#include "c-objc-common.h" -static int c_tree_printer PARAMS ((output_buffer *)); -static tree inline_forbidden_p PARAMS ((tree *, int *, void *)); -static void expand_deferred_fns PARAMS ((void)); -static tree start_cdtor PARAMS ((int)); -static void finish_cdtor PARAMS ((tree)); +static bool c_tree_printer (pretty_printer *, text_info *, const char *, + int, bool, bool, bool); -static varray_type deferred_fns; - -int -c_missing_noreturn_ok_p (decl) - tree decl; +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. */ +/* Called from check_global_declarations. */ -int -c_disregard_inline_limits (fn) - tree fn; +bool +c_warn_unused_global_decl (const_tree decl) { - if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) - return 1; - - return DECL_DECLARED_INLINE_P (fn) && DECL_EXTERNAL (fn); -} - -static tree -inline_forbidden_p (nodep, walk_subtrees, fn) - tree *nodep; - int *walk_subtrees ATTRIBUTE_UNUSED; - void *fn; -{ - tree node = *nodep; - tree t; - - switch (TREE_CODE (node)) - { - case CALL_EXPR: - t = get_callee_fndecl (node); - - if (! t) - break; - - /* We cannot inline functions that call setjmp. */ - if (setjmp_call_p (t)) - return node; - - switch (DECL_FUNCTION_CODE (t)) - { - /* We cannot inline functions that take a variable number of - arguments. */ - case BUILT_IN_VARARGS_START: - case BUILT_IN_STDARG_START: -#if 0 - /* Functions that need information about the address of the - caller can't (shouldn't?) be inlined. */ - case BUILT_IN_RETURN_ADDRESS: -#endif - return node; - - default: - break; - } - - break; + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) + return false; + if (DECL_IN_SYSTEM_HEADER (decl)) + return false; - case DECL_STMT: - /* We cannot inline functions that contain other functions. */ - if (TREE_CODE (TREE_OPERAND (node, 0)) == FUNCTION_DECL - && DECL_INITIAL (TREE_OPERAND (node, 0))) - return node; - break; - - case GOTO_STMT: - case GOTO_EXPR: - t = TREE_OPERAND (node, 0); - - /* We will not inline a function which uses computed goto. The - addresses of its local labels, which may be tucked into - global storage, are of course not constant across - instantiations, which causes unexpected behaviour. */ - if (TREE_CODE (t) != LABEL_DECL) - return node; - - /* We cannot inline a nested function that jumps to a nonlocal - label. */ - if (TREE_CODE (t) == LABEL_DECL - && DECL_CONTEXT (t) && DECL_CONTEXT (t) != fn) - return node; - - break; - - default: - break; - } - - return NULL_TREE; -} - -int -c_cannot_inline_tree_fn (fnp) - tree *fnp; -{ - tree fn = *fnp; - tree t; - - if (flag_really_no_inline - && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL) - return 1; - - if (! function_attribute_inlinable_p (fn)) - { - DECL_UNINLINABLE (fn) = 1; - return 1; - } - - /* If a function has pending sizes, we must not defer its - compilation, and we can't inline it as a tree. */ - if (fn == current_function_decl) - { - t = get_pending_sizes (); - put_pending_sizes (t); - - if (t) - { - DECL_UNINLINABLE (fn) = 1; - return 1; - } - } - - if (DECL_CONTEXT (fn)) - { - /* If a nested function has pending sizes, we may have already - saved them. */ - if (DECL_LANG_SPECIFIC (fn)->pending_sizes) - { - DECL_UNINLINABLE (fn) = 1; - return 1; - } - } - else - { - /* We rely on the fact that this function is called upfront, - just before we start expanding a function. If FN is active - (i.e., it's the current_function_decl or a parent thereof), - we have to walk FN's saved tree. Otherwise, we can safely - assume we have done it before and, if we didn't mark it as - uninlinable (in which case we wouldn't have been called), it - is inlinable. Unfortunately, this strategy doesn't work for - nested functions, because they're only expanded as part of - their enclosing functions, so the inlinability test comes in - late. */ - t = current_function_decl; - - while (t && t != fn) - t = DECL_CONTEXT (t); - if (! t) - return 0; - } - - if (walk_tree (&DECL_SAVED_TREE (fn), inline_forbidden_p, fn, NULL)) - { - DECL_UNINLINABLE (fn) = 1; - return 1; - } - - return 0; + return true; } /* Initialization common to C and Objective-C front ends. */ -const char * -c_objc_common_init (filename) - const char *filename; +bool +c_objc_common_init (void) { c_init_decl_processing (); - filename = c_common_init (filename); - - lang_unsafe_for_reeval = c_unsafe_for_reeval; - - save_lang_status = &push_c_function_context; - restore_lang_status = &pop_c_function_context; - mark_lang_status = &mark_c_function_context; - lang_expand_expr = c_expand_expr; - lang_expand_decl_stmt = c_expand_decl_stmt; + 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; - lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p; - - /* 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; - } - VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns"); - ggc_add_tree_varray_root (&deferred_fns, 1); - - return filename; + return true; } -/* Register a function tree, so that its optimization and conversion - to RTL is only done at the end of the compilation. */ +/* 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. -int -defer_fn (fn) - tree fn; + 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) { - VARRAY_PUSH_TREE (deferred_fns, fn); + tree t; + tree name; + c_pretty_printer *cpp = (c_pretty_printer *) pp; + pp->padding = pp_none; - return 1; -} + if (precision != 0 || wide || hash) + return false; -/* Expand deferred functions for C and ObjC. */ + if (*spec == 'K') + { + percent_K_format (text); + return true; + } -static void -expand_deferred_fns () -{ - unsigned int i; + t = va_arg (*text->args_ptr, tree); - for (i = 0; i < VARRAY_ACTIVE_SIZE (deferred_fns); i++) - { - tree decl = VARRAY_TREE (deferred_fns, i); + if (set_locus && text->locus) + *text->locus = DECL_SOURCE_LOCATION (t); - if (! TREE_ASM_WRITTEN (decl)) + switch (*spec) + { + case 'D': + if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t)) { - /* For static inline functions, delay the decision whether to - emit them or not until wrapup_global_declarations. */ - if (! TREE_PUBLIC (decl)) - DECL_DEFER_OUTPUT (decl) = 1; - c_expand_deferred_function (decl); + t = DECL_DEBUG_EXPR (t); + if (!DECL_P (t)) + { + pp_c_expression (cpp, t); + return true; + } } - } + /* FALLTHRU */ - VARRAY_FREE (deferred_fns); -} - -static tree -start_cdtor (method_type) - int method_type; -{ - tree fnname = get_file_function_name (method_type); - tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node); - tree body; + case 'F': + if (DECL_NAME (t)) + { + pp_identifier (cpp, lang_hooks.decl_printable_name (t, 2)); + return true; + } + break; - start_function (void_list_node_1, - build_nt (CALL_EXPR, fnname, - tree_cons (NULL_TREE, NULL_TREE, void_list_node_1), - NULL_TREE), - NULL_TREE); - store_parm_decls (); + case 'T': + gcc_assert (TYPE_P (t)); + name = TYPE_NAME (t); - current_function_cannot_inline - = "static constructors and destructors cannot be inlined"; + if (name && TREE_CODE (name) == TYPE_DECL) + { + if (DECL_NAME (name)) + pp_identifier (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; - body = c_begin_compound_stmt (); + case 'E': + if (TREE_CODE (t) == IDENTIFIER_NODE) + pp_identifier (cpp, IDENTIFIER_POINTER (t)); + else + pp_expression (cpp, t); + return true; - pushlevel (0); - clear_last_expr (); - add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0); + default: + return false; + } - return body; + pp_string (cpp, _("({anonymous})")); + return true; } -static void -finish_cdtor (body) - tree body; +/* In C and ObjC, all decls have "C" linkage. */ +bool +has_c_linkage (const_tree decl ATTRIBUTE_UNUSED) { - tree scope; - tree block; - - scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0); - block = poplevel (0, 0, 0); - SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block; - SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block; - - RECHAIN_STMTS (body, COMPOUND_BODY (body)); - - finish_function (0); + return true; } -/* Called at end of parsing, but before end-of-file processing. */ - void -c_objc_common_finish_file () +c_initialize_diagnostics (diagnostic_context *context) { - expand_deferred_fns (); - - if (static_ctors) - { - tree body = start_cdtor ('I'); - - for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors)) - c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors), - NULL_TREE)); - - finish_cdtor (body); - } - - if (static_dtors) - { - tree body = start_cdtor ('D'); - - for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors)) - c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors), - NULL_TREE)); - - finish_cdtor (body); - } - - { - int flags; - FILE *stream = dump_begin (TDI_all, &flags); - - if (stream) - { - dump_node (getdecls (), flags & ~TDF_SLIM, stream); - dump_end (TDI_all, stream); - } - } + 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); } -/* 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, - %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 int -c_tree_printer (buffer) - output_buffer *buffer; +int +c_types_compatible_p (tree x, tree y) { - tree t = va_arg (output_buffer_format_args (buffer), tree); + return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y)); +} - switch (*output_buffer_text_cursor (buffer)) - { - case 'D': - case 'F': - case 'T': - { - const char *n = DECL_NAME (t) - ? (*lang_hooks.decl_printable_name) (t, 2) - : "({anonymous})"; - output_add_string (buffer, n); - } - return 1; +/* Determine if the type is a vla type for the backend. */ - default: - return 0; - } +bool +c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED) +{ + return c_vla_type_p (x); }