X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Flanghooks.c;h=37baa271e70b4068b5d3e6255ce90ea9c560b560;hb=653d0639db9f426c9cc72bdb620d2d06055af72e;hp=69be1f571d409a6d6e516eefd6d67d9838a53786;hpb=1e8e992020adfba209ef30b3c369e2ca6282d837;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/langhooks.c b/gcc/langhooks.c index 69be1f571d4..37baa271e70 100644 --- a/gcc/langhooks.c +++ b/gcc/langhooks.c @@ -1,12 +1,13 @@ /* Default language-specific hooks. - Copyright 2001, 2002, 2003, 2004, 2005 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, @@ -15,9 +16,8 @@ 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. */ +along with GCC; see the file COPYING3. If not see +. */ #include "config.h" #include "system.h" @@ -27,15 +27,19 @@ Boston, MA 02110-1301, USA. */ #include "toplev.h" #include "tree.h" #include "tree-inline.h" -#include "tree-gimple.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. */ @@ -51,6 +55,13 @@ lhd_do_nothing_t (tree ARG_UNUSED (t)) { } +/* Pass through (tree). */ +tree +lhd_pass_through_t (tree t) +{ + return t; +} + /* Do nothing (int). */ void @@ -75,18 +86,18 @@ lhd_do_nothing_f (struct function * ARG_UNUSED (f)) { } -/* Do nothing (return the tree node passed). */ +/* Do nothing (return NULL_TREE). */ tree -lhd_return_tree (tree t) +lhd_return_null_tree_v (void) { - return t; + return NULL_TREE; } /* Do nothing (return NULL_TREE). */ tree -lhd_return_null_tree_v (void) +lhd_return_null_tree (tree ARG_UNUSED (t)) { return NULL_TREE; } @@ -94,7 +105,7 @@ lhd_return_null_tree_v (void) /* Do nothing (return NULL_TREE). */ tree -lhd_return_null_tree (tree ARG_UNUSED (t)) +lhd_return_null_const_tree (const_tree ARG_UNUSED (t)) { return NULL_TREE; } @@ -104,6 +115,9 @@ lhd_return_null_tree (tree ARG_UNUSED (t)) bool lhd_post_options (const char ** ARG_UNUSED (pfilename)) { + /* Excess precision other than "fast" requires front-end + support. */ + flag_excess_precision_cmdline = EXCESS_PRECISION_FAST; return false; } @@ -116,31 +130,15 @@ lhd_print_tree_nothing (FILE * ARG_UNUSED (file), { } -/* 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) +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; @@ -154,6 +152,8 @@ lhd_warn_unused_global_decl (tree decl) void 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 @@ -163,33 +163,31 @@ lhd_set_decl_assembler_name (tree 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. - + 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) - SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl)); + id = targetm.mangle_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)); + id = get_identifier (label); } -} + SET_DECL_ASSEMBLER_NAME (decl, id); -/* By default we always allow bit-field based optimizations. */ -bool -lhd_can_use_bit_fields_p (void) -{ - return true; } /* Type promotion for variable arguments. */ @@ -208,7 +206,7 @@ lhd_register_builtin_type (tree ARG_UNUSED (type), /* Invalid use of an incomplete type. */ void -lhd_incomplete_type_error (tree ARG_UNUSED (value), tree type) +lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type) { gcc_assert (TREE_CODE (type) == ERROR_MARK); return; @@ -217,44 +215,12 @@ lhd_incomplete_type_error (tree ARG_UNUSED (value), tree type) /* 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 +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. */ - -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 * @@ -264,129 +230,24 @@ lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity)) return IDENTIFIER_POINTER (DECL_NAME (decl)); } -/* 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; -} +/* This is the default dwarf_name function. */ -/* 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) +const char * +lhd_dwarf_name (tree t, int verbosity) { - 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)); -} + gcc_assert (DECL_P (t)); -/* 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; + return lang_hooks.decl_printable_name (t, verbosity); } -/* 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. */ +/* 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_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) +lhd_types_compatible_p (tree x, tree y) { - return value; + return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y); } /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree @@ -403,29 +264,17 @@ lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED) language-specific way. */ int -lhd_tree_dump_type_quals (tree t) +lhd_tree_dump_type_quals (const_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) +lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED, + gimple_seq *pre_p ATTRIBUTE_UNUSED, + gimple_seq *post_p ATTRIBUTE_UNUSED) { return GS_UNHANDLED; } @@ -443,33 +292,30 @@ lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED) sibcall. */ bool -lhd_decl_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED) +lhd_decl_ok_for_sibcall (const_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) { + tree globals, decl, *vec; + int len, i; + + /* 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. */ - tree globals = lang_hooks.decls.getdecls (); - int len = list_length (globals); - tree *vec = xmalloc (sizeof (tree) * len); - int i; - tree decl; + 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. */ @@ -494,12 +340,15 @@ 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) +lhd_print_error_function (diagnostic_context *context, const char *file, + diagnostic_info *diagnostic) { - if (diagnostic_last_function_changed (context)) + if (diagnostic_last_function_changed (context, diagnostic)) { const char *old_prefix = context->printer->prefix; - char *new_prefix = file ? file_name_as_prefix (file) : NULL; + 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); @@ -507,17 +356,97 @@ lhd_print_error_function (diagnostic_context *context, const char *file) pp_printf (context->printer, _("At top level:")); else { - if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE) + 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:"), - lang_hooks.decl_printable_name (current_function_decl, 2)); + (context->printer, _("In member function %qs"), + identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2))); else pp_printf - (context->printer, _("In function %qs:"), - lang_hooks.decl_printable_name (current_function_decl, 2)); + (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_set_last_function (context, diagnostic); pp_flush (context->printer); context->printer->prefix = old_prefix; free ((char*) new_prefix); @@ -526,8 +455,7 @@ lhd_print_error_function (diagnostic_context *context, const char *file) tree lhd_callgraph_analyze_expr (tree *tp ATTRIBUTE_UNUSED, - int *walk_subtrees ATTRIBUTE_UNUSED, - tree decl ATTRIBUTE_UNUSED) + int *walk_subtrees ATTRIBUTE_UNUSED) { return NULL; } @@ -545,8 +473,7 @@ lhd_to_target_charset (HOST_WIDE_INT c) } tree -lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, - bool *ti ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED) +lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED) { return expr; } @@ -567,7 +494,7 @@ lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED) tree lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src) { - return build2 (MODIFY_EXPR, void_type_node, dst, src); + return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src); } /* Register language specific type size variables as potentially OpenMP @@ -578,3 +505,137 @@ lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED) { } + +/* 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)) +{ + 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); + +} + +/* Create a builtin function. */ + +tree +add_builtin_function (const char *name, + tree type, + int function_code, + enum built_in_class cl, + const char *library_name, + tree attrs) +{ + return add_builtin_function_common (name, type, function_code, cl, + library_name, attrs, + lang_hooks.builtin_function); +} + +/* 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) +{ + return add_builtin_function_common (name, type, function_code, cl, + library_name, attrs, + lang_hooks.builtin_function_ext_scope); +} + +tree +lhd_builtin_function (tree decl) +{ + lang_hooks.decls.pushdecl (decl); + return decl; +} + +/* 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 +lhd_begin_section (const char *name) +{ + section *section; + + /* 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; + + /* Create a new section and switch to it. */ + section = get_section (name, SECTION_DEBUG, NULL); + switch_to_section (section); +} + + +/* Write DATA of length LEN to the current LTO output section. This default + implementation just calls assemble_string and frees BLOCK. */ + +void +lhd_append_data (const void *data, size_t len, void *block) +{ + if (data) + assemble_string ((const char *)data, len); + free (block); +} + + +/* 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; + } +}