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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/langhooks.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/langhooks.c | 631 |
1 files changed, 631 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/langhooks.c b/gcc-4.2.1-5666.3/gcc/langhooks.c new file mode 100644 index 000000000..74a332e78 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/langhooks.c @@ -0,0 +1,631 @@ +/* Default language-specific hooks. + Copyright 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Contributed by Alexandre Oliva <aoliva@redhat.com> + +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 "intl.h" +#include "tm.h" +#include "toplev.h" +#include "tree.h" +#include "tree-inline.h" +#include "tree-gimple.h" +#include "rtl.h" +#include "insn-config.h" +#include "integrate.h" +#include "flags.h" +#include "langhooks.h" +#include "langhooks-def.h" +#include "ggc.h" +#include "diagnostic.h" + +/* Do nothing; in many cases the default hook. */ + +void +lhd_do_nothing (void) +{ +} + +/* Do nothing (tree). */ + +void +lhd_do_nothing_t (tree ARG_UNUSED (t)) +{ +} + +/* Do nothing (int). */ + +void +lhd_do_nothing_i (int ARG_UNUSED (i)) +{ +} + +/* Do nothing (int, int, int). Return NULL_TREE. */ + +tree +lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i), + int ARG_UNUSED (j), + int ARG_UNUSED (k)) +{ + return NULL_TREE; +} + +/* Do nothing (function). */ + +void +lhd_do_nothing_f (struct function * ARG_UNUSED (f)) +{ +} + +/* Do nothing (return the tree node passed). */ + +tree +lhd_return_tree (tree t) +{ + return t; +} + +/* Do nothing (return NULL_TREE). */ + +tree +lhd_return_null_tree_v (void) +{ + return NULL_TREE; +} + +/* Do nothing (return NULL_TREE). */ + +tree +lhd_return_null_tree (tree ARG_UNUSED (t)) +{ + return NULL_TREE; +} + +/* The default post options hook. */ + +bool +lhd_post_options (const char ** ARG_UNUSED (pfilename)) +{ + return false; +} + +/* Called from by print-tree.c. */ + +void +lhd_print_tree_nothing (FILE * ARG_UNUSED (file), + tree ARG_UNUSED (node), + int ARG_UNUSED (indent)) +{ +} + +/* Called from safe_from_p. */ + +int +lhd_safe_from_p (rtx ARG_UNUSED (x), tree ARG_UNUSED (exp)) +{ + return 1; +} + +/* Called from staticp. */ + +tree +lhd_staticp (tree ARG_UNUSED (exp)) +{ + return NULL; +} + +/* Called from check_global_declarations. */ + +bool +lhd_warn_unused_global_decl (tree decl) +{ + /* This is what used to exist in check_global_declarations. Probably + not many of these actually apply to non-C languages. */ + + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl)) + return false; + if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl)) + return false; + if (DECL_IN_SYSTEM_HEADER (decl)) + return false; + + return true; +} + +/* Set the DECL_ASSEMBLER_NAME for DECL. */ +void +lhd_set_decl_assembler_name (tree decl) +{ + /* The language-independent code should never use the + DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and + VAR_DECLs for variables with static storage duration need a real + DECL_ASSEMBLER_NAME. */ + gcc_assert (TREE_CODE (decl) == FUNCTION_DECL + || (TREE_CODE (decl) == VAR_DECL + && (TREE_STATIC (decl) + || DECL_EXTERNAL (decl) + || TREE_PUBLIC (decl)))); + + /* By default, assume the name to use in assembly code is the same + as that used in the source language. (That's correct for C, and + GCC used to set DECL_ASSEMBLER_NAME to the same value as + DECL_NAME in build_decl, so this choice provides backwards + compatibility with existing front-ends. + + Can't use just the variable's own name for a variable whose scope + is less than the whole compilation. Concatenate a distinguishing + number - we use the DECL_UID. */ + if (TREE_PUBLIC (decl) || DECL_CONTEXT (decl) == NULL_TREE) + SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl)); + else + { + const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); + char *label; + + ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl)); + SET_DECL_ASSEMBLER_NAME (decl, get_identifier (label)); + } +} + +/* By default we always allow bit-field based optimizations. */ +bool +lhd_can_use_bit_fields_p (void) +{ + return true; +} + +/* Type promotion for variable arguments. */ +tree +lhd_type_promotes_to (tree ARG_UNUSED (type)) +{ + gcc_unreachable (); +} + +/* Registration of machine- or os-specific builtin types. */ +void +lhd_register_builtin_type (tree ARG_UNUSED (type), + const char * ARG_UNUSED (name)) +{ +} + +/* Invalid use of an incomplete type. */ +void +lhd_incomplete_type_error (tree ARG_UNUSED (value), tree type) +{ + gcc_assert (TREE_CODE (type) == ERROR_MARK); + return; +} + +/* Provide a default routine for alias sets that always returns -1. This + is used by languages that don't need to do anything special. */ + +HOST_WIDE_INT +lhd_get_alias_set (tree ARG_UNUSED (t)) +{ + return -1; +} + +/* Provide a hook routine for alias sets that always returns 0. This is + used by languages that haven't deal with alias sets yet. */ + +HOST_WIDE_INT +hook_get_alias_set_0 (tree ARG_UNUSED (t)) +{ + return 0; +} + +/* This is the default expand_expr function. */ + +rtx +lhd_expand_expr (tree ARG_UNUSED (t), rtx ARG_UNUSED (r), + enum machine_mode ARG_UNUSED (mm), + int ARG_UNUSED (em), + rtx * ARG_UNUSED (a)) +{ + gcc_unreachable (); +} + +/* The default language-specific function for expanding a decl. After + the language-independent cases are handled, this function will be + called. If this function is not defined, it is assumed that + declarations other than those for variables and labels do not require + any RTL generation. */ + +int +lhd_expand_decl (tree ARG_UNUSED (t)) +{ + return 0; +} + +/* This is the default decl_printable_name function. */ + +const char * +lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity)) +{ + gcc_assert (decl && DECL_NAME (decl)); + return IDENTIFIER_POINTER (DECL_NAME (decl)); +} + +/* This is the default dwarf_name function. */ + +const char * +lhd_dwarf_name (tree t, int verbosity) +{ + gcc_assert (DECL_P (t)); + + return lang_hooks.decl_printable_name (t, verbosity); +} + +/* 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 +lhd_types_compatible_p (tree x, tree y) +{ + return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y); +} + +/* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree() + after handling common cases, but before walking code-specific + sub-trees. If this hook is overridden for a language, it should + handle language-specific tree codes, as well as language-specific + information associated to common tree codes. If a tree node is + completely handled within this function, it should set *SUBTREES to + 0, so that generic handling isn't attempted. The generic handling + cannot deal with language-specific tree codes, so make sure it is + set properly. Both SUBTREES and *SUBTREES is guaranteed to be + nonzero when the function is called. */ + +tree +lhd_tree_inlining_walk_subtrees (tree *tp ATTRIBUTE_UNUSED, + int *subtrees ATTRIBUTE_UNUSED, + walk_tree_fn func ATTRIBUTE_UNUSED, + void *data ATTRIBUTE_UNUSED, + struct pointer_set_t *pset ATTRIBUTE_UNUSED) +{ + return NULL_TREE; +} + +/* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to + determine whether there are language-specific reasons for not + inlining a given function. */ + +int +lhd_tree_inlining_cannot_inline_tree_fn (tree *fnp) +{ + if (flag_really_no_inline + && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL) + return 1; + + return 0; +} + +/* lang_hooks.tree_inlining.disregard_inline_limits is called to + determine whether a function should be considered for inlining even + if it would exceed inlining limits. */ + +int +lhd_tree_inlining_disregard_inline_limits (tree fn) +{ + if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) + return 1; + + return 0; +} + +/* lang_hooks.tree_inlining.add_pending_fn_decls is called before + starting to inline a function, to push any language-specific + functions that should not be inlined into the current function, + into VAFNP. PFN is the top of varray, and should be returned if no + functions are pushed into VAFNP. The top of the varray should be + returned. */ + +tree +lhd_tree_inlining_add_pending_fn_decls (void *vafnp ATTRIBUTE_UNUSED, tree pfn) +{ + return pfn; +} + +/* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine + whether VT is an automatic variable defined in function FT. */ + +int +lhd_tree_inlining_auto_var_in_fn_p (tree var, tree fn) +{ + return (DECL_P (var) && DECL_CONTEXT (var) == fn + && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL) + && ! TREE_STATIC (var)) + || TREE_CODE (var) == LABEL_DECL + || TREE_CODE (var) == RESULT_DECL)); +} + +/* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a + type node representing an anonymous aggregate (union, struct, etc), + i.e., one whose members are in the same scope as the union itself. */ + +int +lhd_tree_inlining_anon_aggr_type_p (tree t ATTRIBUTE_UNUSED) +{ + return 0; +} + +/* APPLE LOCAL begin kext identify vtables */ +int +lhd_vtable_p (tree t ATTRIBUTE_UNUSED) +{ + return 0; +} +/* APPLE LOCAL end kext identify vtables */ + +/* lang_hooks.tree_inlining.start_inlining and end_inlining perform any + language-specific bookkeeping necessary for processing + FN. start_inlining returns nonzero if inlining should proceed, zero if + not. + + For instance, the C++ version keeps track of template instantiations to + avoid infinite recursion. */ + +int +lhd_tree_inlining_start_inlining (tree fn ATTRIBUTE_UNUSED) +{ + return 1; +} + +void +lhd_tree_inlining_end_inlining (tree fn ATTRIBUTE_UNUSED) +{ +} + +/* lang_hooks.tree_inlining.convert_parm_for_inlining performs any + language-specific conversion before assigning VALUE to PARM. */ + +tree +lhd_tree_inlining_convert_parm_for_inlining (tree parm ATTRIBUTE_UNUSED, + tree value, + tree fndecl ATTRIBUTE_UNUSED, + int argnum ATTRIBUTE_UNUSED) +{ + return value; +} + +/* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree + nodes. Returns nonzero if it does not want the usual dumping of the + second argument. */ + +bool +lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED) +{ + return false; +} + +/* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a + language-specific way. */ + +int +lhd_tree_dump_type_quals (tree t) +{ + return TYPE_QUALS (t); +} + +/* lang_hooks.expr_size: Determine the size of the value of an expression T + in a language-specific way. Returns a tree for the size in bytes. */ + +tree +lhd_expr_size (tree exp) +{ + if (DECL_P (exp) + && DECL_SIZE_UNIT (exp) != 0) + return DECL_SIZE_UNIT (exp); + else + return size_in_bytes (TREE_TYPE (exp)); +} + +/* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */ + +int +lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED, tree *pre_p ATTRIBUTE_UNUSED, + tree *post_p ATTRIBUTE_UNUSED) +{ + return GS_UNHANDLED; +} + +/* lang_hooks.tree_size: Determine the size of a tree with code C, + which is a language-specific tree code in category tcc_constant or + tcc_exceptional. The default expects never to be called. */ +size_t +lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED) +{ + gcc_unreachable (); +} + +/* Return true if decl, which is a function decl, may be called by a + sibcall. */ + +bool +lhd_decl_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED) +{ + return true; +} + +/* Return the COMDAT group into which DECL should be placed. */ + +const char * +lhd_comdat_group (tree decl) +{ + return IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); +} + +/* lang_hooks.decls.final_write_globals: perform final processing on + global variables. */ +void +write_global_declarations (void) +{ + /* Really define vars that have had only a tentative definition. + Really output inline functions that must actually be callable + and have not been output so far. */ + + tree globals = lang_hooks.decls.getdecls (); + int len = list_length (globals); + tree *vec = XNEWVEC (tree, len); + int i; + tree decl; + + /* Process the decls in reverse order--earliest first. + Put them into VEC from back to front, then take out from front. */ + + for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl)) + vec[len - i - 1] = decl; + + wrapup_global_declarations (vec, len); + check_global_declarations (vec, len); + emit_debug_global_declarations (vec, len); + + /* Clean up. */ + free (vec); +} + +/* Called to perform language-specific initialization of CTX. */ +void +lhd_initialize_diagnostics (struct diagnostic_context *ctx ATTRIBUTE_UNUSED) +{ +} + +/* The default function to print out name of current function that caused + an error. */ +void +lhd_print_error_function (diagnostic_context *context, const char *file) +{ + if (diagnostic_last_function_changed (context)) + { + const char *old_prefix = context->printer->prefix; + char *new_prefix = file ? file_name_as_prefix (file) : NULL; + + pp_set_prefix (context->printer, new_prefix); + + if (current_function_decl == NULL) + /* APPLE LOCAL default to Wformat-security 5764921 */ + pp_printf (context->printer, "%s", _("At top level:")); + else + { + if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE) + pp_printf + (context->printer, _("In member function %qs:"), + lang_hooks.decl_printable_name (current_function_decl, 2)); + else + pp_printf + (context->printer, _("In function %qs:"), + lang_hooks.decl_printable_name (current_function_decl, 2)); + } + + diagnostic_set_last_function (context); + pp_flush (context->printer); + context->printer->prefix = old_prefix; + free ((char*) new_prefix); + } +} + +tree +lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED, + int *walk_subtrees ATTRIBUTE_UNUSED, + tree decl ATTRIBUTE_UNUSED) +{ + return NULL; +} + +tree +lhd_make_node (enum tree_code code) +{ + return make_node (code); +} + +HOST_WIDE_INT +lhd_to_target_charset (HOST_WIDE_INT c) +{ + return c; +} + +/* APPLE LOCAL begin 4133801 */ +#if 0 +void +lhd_start_source_file (int n, const char *s) +{ + (*debug_hooks->start_source_file) (n, s); +} + +void +lhd_end_source_file (int n, const char *s ATTRIBUTE_UNUSED) +{ + (*debug_hooks->end_source_file) (n); +} +#endif +/* APPLE LOCAL end 4133801 */ + +tree +lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, + bool *ti ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED) +{ + return expr; +} + +/* Return sharing kind if OpenMP sharing attribute of DECL is + predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */ + +enum omp_clause_default_kind +lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED) +{ + if (DECL_ARTIFICIAL (decl)) + return OMP_CLAUSE_DEFAULT_SHARED; + return OMP_CLAUSE_DEFAULT_UNSPECIFIED; +} + +/* Generate code to copy SRC to DST. */ + +tree +lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src) +{ + return build2 (MODIFY_EXPR, void_type_node, dst, src); +} + +/* Register language specific type size variables as potentially OpenMP + firstprivate variables. */ + +void +lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED, + tree t ATTRIBUTE_UNUSED) +{ +} + +/* APPLE LOCAL begin radar 6353006 */ +tree +lhd_build_generic_block_struct_type (void) +{ + return NULL_TREE; +} +/* APPLE LOCAL end radar 6353006 */ + +/* APPLE LOCAL begin radar 6386976 */ +bool +lhd_is_runtime_specific_type (tree type ATTRIBUTE_UNUSED) +{ + return false; +} +/* APPLE LOCAL end radar 6386976 */ |