| /* Some code common to C and ObjC front ends. |
| Copyright (C) 2001, 2002, 2003, 2004 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, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, 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 "expr.h" |
| #include "c-tree.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 "target.h" |
| #include "cgraph.h" |
| |
| static bool c_tree_printer (pretty_printer *, text_info *); |
| static tree start_cdtor (int); |
| static void finish_cdtor (tree); |
| |
| int |
| 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) |
| && DECL_EXTERNAL (fn)); |
| } |
| |
| int |
| c_cannot_inline_tree_fn (tree *fnp) |
| { |
| tree fn = *fnp; |
| tree t; |
| 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 ("%Jfunction '%F' can never be inlined because it " |
| "is suppressed using -fno-inline", fn, 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 ("%Jfunction '%F' can never be inlined because it might not " |
| "be bound within this unit of translation", fn, fn); |
| goto cannot_inline; |
| } |
| |
| if (! function_attribute_inlinable_p (fn)) |
| { |
| if (do_warning) |
| warning ("%Jfunction '%F' can never be inlined because it uses " |
| "attributes conflicting with inlining", fn, fn); |
| goto cannot_inline; |
| } |
| |
| /* 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) |
| { |
| if (do_warning) |
| warning ("%Jfunction '%F' can never be inlined because it has " |
| "pending sizes", fn, fn); |
| goto cannot_inline; |
| } |
| } |
| |
| if (! DECL_FILE_SCOPE_P (fn)) |
| { |
| /* If a nested function has pending sizes, we may have already |
| saved them. */ |
| if (DECL_LANG_SPECIFIC (fn)->pending_sizes) |
| { |
| if (do_warning) |
| warning ("%Jnested function '%F' can never be inlined because it " |
| "has possibly saved pending sizes", fn, 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) |
| { |
| static const enum tree_code stmt_codes[] = { |
| c_common_stmt_codes |
| }; |
| |
| INIT_STATEMENT_CODES (stmt_codes); |
| |
| c_init_decl_processing (); |
| |
| if (c_common_init () == false) |
| return false; |
| |
| lang_expand_decl_stmt = c_expand_decl_stmt; |
| |
| /* 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; |
| } |
| |
| return true; |
| } |
| |
| static tree |
| start_cdtor (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; |
| |
| 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 (); |
| |
| current_function_cannot_inline |
| = "static constructors and destructors cannot be inlined"; |
| |
| body = c_begin_compound_stmt (); |
| |
| pushlevel (0); |
| clear_last_expr (); |
| add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0); |
| |
| return body; |
| } |
| |
| static void |
| finish_cdtor (tree body) |
| { |
| 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 (); |
| } |
| |
| /* Called at end of parsing, but before end-of-file processing. */ |
| |
| void |
| c_objc_common_finish_file (void) |
| { |
| if (pch_file) |
| c_common_write_pch (); |
| |
| /* If multiple translation units were built, copy information between |
| them based on linkage rules. */ |
| merge_translation_unit_decls (); |
| |
| cgraph_finalize_compilation_unit (); |
| cgraph_optimize (); |
| |
| 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); |
| } |
| } |
| } |
| |
| /* 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 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) |
| { |
| tree t = va_arg (*text->args_ptr, tree); |
| const char *n = "({anonymous})"; |
| |
| switch (*text->format_spec) |
| { |
| case 'D': |
| case 'F': |
| if (DECL_NAME (t)) |
| n = (*lang_hooks.decl_printable_name) (t, 2); |
| break; |
| |
| case 'T': |
| if (TREE_CODE (t) == TYPE_DECL) |
| { |
| if (DECL_NAME (t)) |
| n = (*lang_hooks.decl_printable_name) (t, 2); |
| } |
| else |
| { |
| t = TYPE_NAME (t); |
| if (t) |
| n = IDENTIFIER_POINTER (t); |
| } |
| break; |
| |
| case 'E': |
| if (TREE_CODE (t) == IDENTIFIER_NODE) |
| n = IDENTIFIER_POINTER (t); |
| else |
| return false; |
| break; |
| |
| default: |
| return false; |
| } |
| |
| pp_string (pp, n); |
| return true; |
| } |