X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Flanghooks.c;h=37baa271e70b4068b5d3e6255ce90ea9c560b560;hb=0b50e41b4fe9ea3c7b2d82114e3db36d3dc53f4b;hp=423bb5f421b2c29b43fbff7bf379526ed2986f9e;hpb=e938cdf5e5499e3065f0e8ec50694d9ffdb7e854;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/langhooks.c b/gcc/langhooks.c index 423bb5f421b..37baa271e70 100644 --- a/gcc/langhooks.c +++ b/gcc/langhooks.c @@ -1,12 +1,13 @@ /* Default language-specific hooks. - Copyright 2001, 2002 Free Software Foundation, Inc. + Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. Contributed by Alexandre Oliva 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) +the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, @@ -15,131 +16,129 @@ 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. */ +along with GCC; see the file COPYING3. If not see +. */ #include "config.h" #include "system.h" #include "coretypes.h" +#include "intl.h" #include "tm.h" #include "toplev.h" #include "tree.h" -#include "c-tree.h" #include "tree-inline.h" +#include "gimple.h" #include "rtl.h" #include "insn-config.h" #include "integrate.h" #include "flags.h" #include "langhooks.h" +#include "target.h" #include "langhooks-def.h" +#include "ggc.h" +#include "diagnostic.h" +#include "tree-diagnostic.h" +#include "cgraph.h" +#include "output.h" /* Do nothing; in many cases the default hook. */ void -lhd_do_nothing () +lhd_do_nothing (void) { } /* Do nothing (tree). */ void -lhd_do_nothing_t (t) - tree t ATTRIBUTE_UNUSED; +lhd_do_nothing_t (tree ARG_UNUSED (t)) { } -/* Do nothing (int). */ - -void -lhd_do_nothing_i (i) - int i ATTRIBUTE_UNUSED; +/* Pass through (tree). */ +tree +lhd_pass_through_t (tree t) { + return t; } -/* Do nothing (function). */ +/* Do nothing (int). */ void -lhd_do_nothing_f (f) - struct function *f ATTRIBUTE_UNUSED; +lhd_do_nothing_i (int ARG_UNUSED (i)) { } -/* Do nothing (return the tree node passed). */ +/* Do nothing (int, int, int). Return NULL_TREE. */ tree -lhd_return_tree (t) - tree t; +lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i), + int ARG_UNUSED (j), + int ARG_UNUSED (k)) { - return t; + return NULL_TREE; } -/* Do nothing (return NULL_TREE). */ +/* Do nothing (function). */ -tree -lhd_return_null_tree (t) - tree t ATTRIBUTE_UNUSED; +void +lhd_do_nothing_f (struct function * ARG_UNUSED (f)) { - return NULL_TREE; } -/* The default post options hook. */ +/* Do nothing (return NULL_TREE). */ -bool -lhd_post_options (pfilename) - const char **pfilename ATTRIBUTE_UNUSED; +tree +lhd_return_null_tree_v (void) { - return false; + return NULL_TREE; } -/* Called from by print-tree.c. */ +/* Do nothing (return NULL_TREE). */ -void -lhd_print_tree_nothing (file, node, indent) - FILE *file ATTRIBUTE_UNUSED; - tree node ATTRIBUTE_UNUSED; - int indent ATTRIBUTE_UNUSED; +tree +lhd_return_null_tree (tree ARG_UNUSED (t)) { + return NULL_TREE; } -/* Called from safe_from_p. */ +/* Do nothing (return NULL_TREE). */ -int -lhd_safe_from_p (x, exp) - rtx x ATTRIBUTE_UNUSED; - tree exp ATTRIBUTE_UNUSED; +tree +lhd_return_null_const_tree (const_tree ARG_UNUSED (t)) { - return 1; + return NULL_TREE; } -/* Called from unsafe_for_reeval. */ +/* The default post options hook. */ -int -lhd_unsafe_for_reeval (t) - tree t ATTRIBUTE_UNUSED; +bool +lhd_post_options (const char ** ARG_UNUSED (pfilename)) { - return -1; + /* Excess precision other than "fast" requires front-end + support. */ + flag_excess_precision_cmdline = EXCESS_PRECISION_FAST; + return false; } -/* Called from staticp. */ +/* Called from by print-tree.c. */ -int -lhd_staticp (exp) - tree exp ATTRIBUTE_UNUSED; +void +lhd_print_tree_nothing (FILE * ARG_UNUSED (file), + tree ARG_UNUSED (node), + int ARG_UNUSED (indent)) { - return 0; } /* Called from check_global_declarations. */ bool -lhd_warn_unused_global_decl (decl) - tree decl; +lhd_warn_unused_global_decl (const_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)) + if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) return false; if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl)) return false; @@ -151,349 +150,492 @@ lhd_warn_unused_global_decl (decl) /* Set the DECL_ASSEMBLER_NAME for DECL. */ void -lhd_set_decl_assembler_name (decl) - tree decl; +lhd_set_decl_assembler_name (tree decl) { + tree id; + /* 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. */ - if (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. */ - SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl)); + 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. This assumption is wrapped + in a target hook, to allow for target-specific modification of the + identifier. + + 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) + id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl)); else - /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of - these DECLs -- unless they're in language-dependent code, in - which case set_decl_assembler_name hook should handle things. */ - abort (); -} + { + const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); + char *label; -/* By default we always allow bit-field based optimizations. */ -bool -lhd_can_use_bit_fields_p () -{ - return true; -} + ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl)); + id = get_identifier (label); + } + SET_DECL_ASSEMBLER_NAME (decl, id); -/* Provide a default routine to clear the binding stack. This is used - by languages that don't need to do anything special. */ -void -lhd_clear_binding_stack () -{ - while (! (*lang_hooks.decls.global_bindings_p) ()) - poplevel (0, 0, 0); } /* Type promotion for variable arguments. */ tree -lhd_type_promotes_to (type) - tree type ATTRIBUTE_UNUSED; +lhd_type_promotes_to (tree ARG_UNUSED (type)) { - abort (); + gcc_unreachable (); } -/* Invalid use of an incomplete type. */ +/* Registration of machine- or os-specific builtin types. */ void -lhd_incomplete_type_error (value, type) - tree value ATTRIBUTE_UNUSED, type; +lhd_register_builtin_type (tree ARG_UNUSED (type), + const char * ARG_UNUSED (name)) { - if (TREE_CODE (type) == ERROR_MARK) - return; +} - abort (); +/* Invalid use of an incomplete type. */ +void +lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_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 (t) - tree t ATTRIBUTE_UNUSED; +alias_set_type +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. */ +/* This is the default decl_printable_name function. */ -HOST_WIDE_INT -hook_get_alias_set_0 (t) - tree t ATTRIBUTE_UNUSED; +const char * +lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity)) { - return 0; + gcc_assert (decl && DECL_NAME (decl)); + return IDENTIFIER_POINTER (DECL_NAME (decl)); } -/* This is the default expand_expr function. */ +/* This is the default dwarf_name function. */ -rtx -lhd_expand_expr (t, r, mm, em) - tree t ATTRIBUTE_UNUSED; - rtx r ATTRIBUTE_UNUSED; - enum machine_mode mm ATTRIBUTE_UNUSED; - int em ATTRIBUTE_UNUSED; +const char * +lhd_dwarf_name (tree t, int verbosity) { - abort (); + gcc_assert (DECL_P (t)); + + return lang_hooks.decl_printable_name (t, verbosity); } -/* This is the default decl_printable_name function. */ +/* 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. */ -const char * -lhd_decl_printable_name (decl, verbosity) - tree decl; - int verbosity ATTRIBUTE_UNUSED; +int +lhd_types_compatible_p (tree x, tree y) { - return IDENTIFIER_POINTER (DECL_NAME (decl)); + 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. For language-specific - tree codes, generic handling would abort(), so make sure it is set - properly. Both SUBTREES and *SUBTREES is guaranteed to be nonzero - when the function is called. */ +/* 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. */ -tree -lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab) - tree *tp ATTRIBUTE_UNUSED; - int *subtrees ATTRIBUTE_UNUSED; - walk_tree_fn func ATTRIBUTE_UNUSED; - void *data ATTRIBUTE_UNUSED; - void *htab ATTRIBUTE_UNUSED; +bool +lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED) { - return NULL_TREE; + return false; } -/* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to - determine whether there are language-specific reasons for not - inlining a given function. */ +/* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a + language-specific way. */ int -lhd_tree_inlining_cannot_inline_tree_fn (fnp) - tree *fnp; +lhd_tree_dump_type_quals (const_tree t) { - if (flag_really_no_inline - && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL) - return 1; - - return 0; + return TYPE_QUALS (t); } -/* 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. */ +/* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */ int -lhd_tree_inlining_disregard_inline_limits (fn) - tree fn; +lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED, + gimple_seq *pre_p ATTRIBUTE_UNUSED, + gimple_seq *post_p ATTRIBUTE_UNUSED) { - if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) - return 1; - - return 0; + return GS_UNHANDLED; } -/* 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 (vafnp, pfn) - void *vafnp ATTRIBUTE_UNUSED; - tree pfn; +/* 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) { - return pfn; + gcc_unreachable (); } -/* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the - TREE_CHAIN of a language-specific tree node is relevant, i.e., - whether it should be walked, copied and preserved across copies. */ +/* Return true if decl, which is a function decl, may be called by a + sibcall. */ -int -lhd_tree_inlining_tree_chain_matters_p (t) - tree t ATTRIBUTE_UNUSED; +bool +lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED) { - return 0; + return true; } -/* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine - whether VT is an automatic variable defined in function FT. */ +/* lang_hooks.decls.final_write_globals: perform final processing on + global variables. */ +void +write_global_declarations (void) +{ + tree globals, decl, *vec; + int len, i; -int -lhd_tree_inlining_auto_var_in_fn_p (var, fn) - tree var, fn; + /* This lang hook is dual-purposed, and also finalizes the + compilation unit. */ + cgraph_finalize_compilation_unit (); + + /* 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. */ + + globals = lang_hooks.decls.getdecls (); + len = list_length (globals); + vec = XNEWVEC (tree, len); + + /* 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) { - 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.copy_res_decl_for_inlining should return a - declaration for the result RES of function FN to be inlined into - CALLER. NDP points to an integer that should be set in case a new - declaration wasn't created (presumably because RES was of aggregate - type, such that a TARGET_EXPR is used for the result). TEXPS is a - pointer to a varray with the stack of TARGET_EXPRs seen while - inlining functions into caller; the top of TEXPS is supposed to - match RES. */ +/* 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, + diagnostic_info *diagnostic) +{ + if (diagnostic_last_function_changed (context, diagnostic)) + { + const char *old_prefix = context->printer->prefix; + tree abstract_origin = diagnostic_abstract_origin (diagnostic); + char *new_prefix = (file && abstract_origin == NULL) + ? file_name_as_prefix (file) : NULL; + + pp_set_prefix (context->printer, new_prefix); + + if (current_function_decl == NULL) + pp_printf (context->printer, _("At top level:")); + else + { + tree fndecl, ao; + + if (abstract_origin) + { + ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin); + while (TREE_CODE (ao) == BLOCK + && BLOCK_ABSTRACT_ORIGIN (ao) + && BLOCK_ABSTRACT_ORIGIN (ao) != ao) + ao = BLOCK_ABSTRACT_ORIGIN (ao); + gcc_assert (TREE_CODE (ao) == FUNCTION_DECL); + fndecl = ao; + } + else + fndecl = current_function_decl; + + if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE) + pp_printf + (context->printer, _("In member function %qs"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2))); + else + pp_printf + (context->printer, _("In function %qs"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2))); + + while (abstract_origin) + { + location_t *locus; + tree block = abstract_origin; + + locus = &BLOCK_SOURCE_LOCATION (block); + fndecl = NULL; + block = BLOCK_SUPERCONTEXT (block); + while (block && TREE_CODE (block) == BLOCK + && BLOCK_ABSTRACT_ORIGIN (block)) + { + ao = BLOCK_ABSTRACT_ORIGIN (block); + + while (TREE_CODE (ao) == BLOCK + && BLOCK_ABSTRACT_ORIGIN (ao) + && BLOCK_ABSTRACT_ORIGIN (ao) != ao) + ao = BLOCK_ABSTRACT_ORIGIN (ao); + + if (TREE_CODE (ao) == FUNCTION_DECL) + { + fndecl = ao; + break; + } + else if (TREE_CODE (ao) != BLOCK) + break; + + block = BLOCK_SUPERCONTEXT (block); + } + if (fndecl) + abstract_origin = block; + else + { + while (block && TREE_CODE (block) == BLOCK) + block = BLOCK_SUPERCONTEXT (block); + + if (block && TREE_CODE (block) == FUNCTION_DECL) + fndecl = block; + abstract_origin = NULL; + } + if (fndecl) + { + expanded_location s = expand_location (*locus); + pp_character (context->printer, ','); + pp_newline (context->printer); + if (s.file != NULL) + { + if (flag_show_column) + pp_printf (context->printer, + _(" inlined from %qs at %s:%d:%d"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)), + s.file, s.line, s.column); + else + pp_printf (context->printer, + _(" inlined from %qs at %s:%d"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)), + s.file, s.line); + + } + else + pp_printf (context->printer, _(" inlined from %qs"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2))); + } + } + pp_character (context->printer, ':'); + } + + diagnostic_set_last_function (context, diagnostic); + pp_flush (context->printer); + context->printer->prefix = old_prefix; + free ((char*) new_prefix); + } +} tree -lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller, - dm, ndp, return_slot_addr) - tree res, fn, caller; - void *dm ATTRIBUTE_UNUSED; - int *ndp ATTRIBUTE_UNUSED; - tree return_slot_addr ATTRIBUTE_UNUSED; -{ - if (return_slot_addr) - return build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (return_slot_addr)), - return_slot_addr); - else - return copy_decl_for_inlining (res, fn, caller); +lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED, + int *walk_subtrees ATTRIBUTE_UNUSED) +{ + return NULL; } -/* 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 (t) - tree t ATTRIBUTE_UNUSED; +tree +lhd_make_node (enum tree_code code) { - return 0; + return make_node (code); } -/* 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. */ +HOST_WIDE_INT +lhd_to_target_charset (HOST_WIDE_INT c) +{ + return c; +} -int -lhd_tree_inlining_start_inlining (fn) - tree fn ATTRIBUTE_UNUSED; +tree +lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED) { - return 1; + return expr; } -void -lhd_tree_inlining_end_inlining (fn) - tree fn ATTRIBUTE_UNUSED; +/* 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; } -/* lang_hooks.tree_inlining.convert_parm_for_inlining performs any - language-specific conversion before assigning VALUE to PARM. */ +/* Generate code to copy SRC to DST. */ tree -lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl) - tree parm ATTRIBUTE_UNUSED; - tree value; - tree fndecl ATTRIBUTE_UNUSED; +lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src) { - return value; + return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src); } -/* 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. */ +/* Register language specific type size variables as potentially OpenMP + firstprivate variables. */ -bool -lhd_tree_dump_dump_tree (di, t) - void *di ATTRIBUTE_UNUSED; - tree t ATTRIBUTE_UNUSED; +void +lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c 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 (t) - tree t; +/* Common function for add_builtin_function and + add_builtin_function_ext_scope. */ +static tree +add_builtin_function_common (const char *name, + tree type, + int function_code, + enum built_in_class cl, + const char *library_name, + tree attrs, + tree (*hook) (tree)) { - return TYPE_QUALS (t); + tree id = get_identifier (name); + tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type); + + TREE_PUBLIC (decl) = 1; + DECL_EXTERNAL (decl) = 1; + DECL_BUILT_IN_CLASS (decl) = cl; + + DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code; + + /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */ + gcc_assert (DECL_FUNCTION_CODE (decl) == function_code); + + if (library_name) + { + tree libname = get_identifier (library_name); + SET_DECL_ASSEMBLER_NAME (decl, libname); + } + + /* Possibly apply some default attributes to this built-in function. */ + if (attrs) + decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN); + else + decl_attributes (&decl, NULL_TREE, 0); + + return hook (decl); + } -/* 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. */ +/* Create a builtin function. */ tree -lhd_expr_size (exp) - tree exp; +add_builtin_function (const char *name, + tree type, + int function_code, + enum built_in_class cl, + const char *library_name, + tree attrs) { - if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'd' - && DECL_SIZE_UNIT (exp) != 0) - return DECL_SIZE_UNIT (exp); - else - return size_in_bytes (TREE_TYPE (exp)); + return add_builtin_function_common (name, type, function_code, cl, + library_name, attrs, + lang_hooks.builtin_function); } -/* lang_hooks.tree_size: Determine the size of a tree with code C, - which is a language-specific tree code in category 'x'. The - default expects never to be called. */ -size_t -lhd_tree_size (c) - enum tree_code c ATTRIBUTE_UNUSED; +/* Like add_builtin_function, but make sure the scope is the external scope. + This is used to delay putting in back end builtin functions until the ISA + that defines the builtin is declared via function specific target options, + which can save memory for machines like the x86_64 that have multiple ISAs. + If this points to the same function as builtin_function, the backend must + add all of the builtins at program initialization time. */ + +tree +add_builtin_function_ext_scope (const char *name, + tree type, + int function_code, + enum built_in_class cl, + const char *library_name, + tree attrs) { - abort (); - return 0; + return add_builtin_function_common (name, type, function_code, cl, + library_name, attrs, + lang_hooks.builtin_function_ext_scope); } -/* Return true if decl, which is a function decl, may be called by a - sibcall. */ - -bool -lhd_decl_ok_for_sibcall (decl) - tree decl ATTRIBUTE_UNUSED; +tree +lhd_builtin_function (tree decl) { - return true; + lang_hooks.decls.pushdecl (decl); + return decl; } -/* lang_hooks.decls.final_write_globals: perform final processing on - global variables. */ +/* LTO hooks. */ + +/* Used to save and restore any previously active section. */ +static section *saved_section; + + +/* Begin a new LTO output section named NAME. This default implementation + saves the old section and emits assembly code to switch to the new + section. */ + void -write_global_declarations () +lhd_begin_section (const char *name) { - /* 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. */ + section *section; - tree globals = (*lang_hooks.decls.getdecls) (); - int len = list_length (globals); - tree *vec = (tree *) xmalloc (sizeof (tree) * len); - int i; - tree decl; + /* Save the old section so we can restore it in lto_end_asm_section. */ + gcc_assert (!saved_section); + saved_section = in_section; + if (!saved_section) + saved_section = text_section; - /* Process the decls in reverse order--earliest first. - Put them into VEC from back to front, then take out from front. */ + /* Create a new section and switch to it. */ + section = get_section (name, SECTION_DEBUG, NULL); + switch_to_section (section); +} - for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl)) - vec[len - i - 1] = decl; - wrapup_global_declarations (vec, len); +/* Write DATA of length LEN to the current LTO output section. This default + implementation just calls assemble_string and frees BLOCK. */ - check_global_declarations (vec, len); +void +lhd_append_data (const void *data, size_t len, void *block) +{ + if (data) + assemble_string ((const char *)data, len); + free (block); +} - /* Clean up. */ - free (vec); + +/* Finish the current LTO output section. This default implementation emits + assembly code to switch to any section previously saved by + lhd_begin_section. */ + +void +lhd_end_section (void) +{ + if (saved_section) + { + switch_to_section (saved_section); + saved_section = NULL; + } }