diff options
Diffstat (limited to 'contrib/gcc/attribs.c')
| -rw-r--r-- | contrib/gcc/attribs.c | 1093 |
1 files changed, 20 insertions, 1073 deletions
diff --git a/contrib/gcc/attribs.c b/contrib/gcc/attribs.c index 47b7cf2..c5a8a73 100644 --- a/contrib/gcc/attribs.c +++ b/contrib/gcc/attribs.c @@ -29,164 +29,45 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "ggc.h" #include "expr.h" #include "tm_p.h" -#include "obstack.h" #include "cpplib.h" #include "target.h" +#include "langhooks.h" static void init_attributes PARAMS ((void)); -/* Table of the tables of attributes (common, format, language, machine) +/* Table of the tables of attributes (common, language, format, machine) searched. */ static const struct attribute_spec *attribute_tables[4]; static bool attributes_initialized = false; -static tree handle_packed_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_nocommon_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_common_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_noreturn_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_noinline_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_always_inline_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_used_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_unused_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_const_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_transparent_union_attribute PARAMS ((tree *, tree, tree, - int, bool *)); -static tree handle_constructor_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_destructor_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_mode_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_section_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_aligned_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_weak_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_alias_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_no_instrument_function_attribute PARAMS ((tree *, tree, - tree, int, - bool *)); -static tree handle_malloc_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_no_limit_stack_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_pure_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_deprecated_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree handle_vector_size_attribute PARAMS ((tree *, tree, tree, int, - bool *)); -static tree vector_size_helper PARAMS ((tree, tree)); - -/* Table of machine-independent attributes common to all C-like languages. */ -static const struct attribute_spec c_common_attribute_table[] = -{ - /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ - { "packed", 0, 0, false, false, false, - handle_packed_attribute }, - { "nocommon", 0, 0, true, false, false, - handle_nocommon_attribute }, - { "common", 0, 0, true, false, false, - handle_common_attribute }, - /* FIXME: logically, noreturn attributes should be listed as - "false, true, true" and apply to function types. But implementing this - would require all the places in the compiler that use TREE_THIS_VOLATILE - on a decl to identify non-returning functions to be located and fixed - to check the function type instead. */ - { "noreturn", 0, 0, true, false, false, - handle_noreturn_attribute }, - { "volatile", 0, 0, true, false, false, - handle_noreturn_attribute }, - { "noinline", 0, 0, true, false, false, - handle_noinline_attribute }, - { "always_inline", 0, 0, true, false, false, - handle_always_inline_attribute }, - { "used", 0, 0, true, false, false, - handle_used_attribute }, - { "unused", 0, 0, false, false, false, - handle_unused_attribute }, - /* The same comments as for noreturn attributes apply to const ones. */ - { "const", 0, 0, true, false, false, - handle_const_attribute }, - { "transparent_union", 0, 0, false, false, false, - handle_transparent_union_attribute }, - { "constructor", 0, 0, true, false, false, - handle_constructor_attribute }, - { "destructor", 0, 0, true, false, false, - handle_destructor_attribute }, - { "mode", 1, 1, false, true, false, - handle_mode_attribute }, - { "section", 1, 1, true, false, false, - handle_section_attribute }, - { "aligned", 0, 1, false, false, false, - handle_aligned_attribute }, - { "weak", 0, 0, true, false, false, - handle_weak_attribute }, - { "alias", 1, 1, true, false, false, - handle_alias_attribute }, - { "no_instrument_function", 0, 0, true, false, false, - handle_no_instrument_function_attribute }, - { "malloc", 0, 0, true, false, false, - handle_malloc_attribute }, - { "no_stack_limit", 0, 0, true, false, false, - handle_no_limit_stack_attribute }, - { "pure", 0, 0, true, false, false, - handle_pure_attribute }, - { "deprecated", 0, 0, false, false, false, - handle_deprecated_attribute }, - { "vector_size", 1, 1, false, true, false, - handle_vector_size_attribute }, - { NULL, 0, 0, false, false, false, NULL } -}; - /* Default empty table of attributes. */ static const struct attribute_spec empty_attribute_table[] = { { NULL, 0, 0, false, false, false, NULL } }; -/* Table of machine-independent attributes for checking formats, if used. */ -const struct attribute_spec *format_attribute_table = empty_attribute_table; - -/* Table of machine-independent attributes for a particular language. */ -const struct attribute_spec *lang_attribute_table = empty_attribute_table; - -/* Flag saying whether common language attributes are to be supported. */ -int lang_attribute_common = 1; - /* Initialize attribute tables, and make some sanity checks if --enable-checking. */ static void init_attributes () { -#ifdef ENABLE_CHECKING - int i; -#endif + size_t i; - attribute_tables[0] - = lang_attribute_common ? c_common_attribute_table : empty_attribute_table; - attribute_tables[1] = lang_attribute_table; - attribute_tables[2] = format_attribute_table; + attribute_tables[0] = lang_hooks.common_attribute_table; + attribute_tables[1] = lang_hooks.attribute_table; + attribute_tables[2] = lang_hooks.format_attribute_table; attribute_tables[3] = targetm.attribute_table; + /* Translate NULL pointers to pointers to the empty table. */ + for (i = 0; i < ARRAY_SIZE (attribute_tables); i++) + if (attribute_tables[i] == NULL) + attribute_tables[i] = empty_attribute_table; + #ifdef ENABLE_CHECKING /* Make some sanity checks on the attribute tables. */ - for (i = 0; - i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0])); - i++) + for (i = 0; i < ARRAY_SIZE (attribute_tables); i++) { int j; @@ -218,9 +99,7 @@ init_attributes () } /* Check that each name occurs just once in each table. */ - for (i = 0; - i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0])); - i++) + for (i = 0; i < ARRAY_SIZE (attribute_tables); i++) { int j, k; for (j = 0; attribute_tables[i][j].name != NULL; j++) @@ -230,16 +109,11 @@ init_attributes () abort (); } /* Check that no name occurs in more than one table. */ - for (i = 0; - i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0])); - i++) + for (i = 0; i < ARRAY_SIZE (attribute_tables); i++) { - int j, k, l; + size_t j, k, l; - for (j = i + 1; - j < ((int) (sizeof (attribute_tables) - / sizeof (attribute_tables[0]))); - j++) + for (j = i + 1; j < ARRAY_SIZE (attribute_tables); j++) for (k = 0; attribute_tables[i][k].name != NULL; k++) for (l = 0; attribute_tables[j][l].name != NULL; l++) if (!strcmp (attribute_tables[i][k].name, @@ -279,7 +153,7 @@ decl_attributes (node, attributes, flags) if (DECL_P (*node) && TREE_CODE (*node) == FUNCTION_DECL && !(flags & (int) ATTR_FLAG_BUILT_IN)) - insert_default_attributes (*node); + (*lang_hooks.insert_default_attributes) (*node); for (a = attributes; a; a = TREE_CHAIN (a)) { @@ -288,12 +162,9 @@ decl_attributes (node, attributes, flags) tree *anode = node; const struct attribute_spec *spec = NULL; bool no_add_attrs = 0; - int i; + size_t i; - for (i = 0; - i < ((int) (sizeof (attribute_tables) - / sizeof (attribute_tables[0]))); - i++) + for (i = 0; i < ARRAY_SIZE (attribute_tables); i++) { int j; @@ -433,930 +304,6 @@ decl_attributes (node, attributes, flags) return returned_attrs; } -/* Handle a "packed" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_packed_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags; - bool *no_add_attrs; -{ - tree *type = NULL; - if (DECL_P (*node)) - { - if (TREE_CODE (*node) == TYPE_DECL) - type = &TREE_TYPE (*node); - } - else - type = node; - - if (type) - { - if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) - *type = build_type_copy (*type); - TYPE_PACKED (*type) = 1; - } - else if (TREE_CODE (*node) == FIELD_DECL) - DECL_PACKED (*node) = 1; - /* We can't set DECL_PACKED for a VAR_DECL, because the bit is - used for DECL_REGISTER. It wouldn't mean anything anyway. */ - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "nocommon" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_nocommon_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == VAR_DECL) - DECL_COMMON (*node) = 0; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "common" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_common_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == VAR_DECL) - DECL_COMMON (*node) = 1; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "noreturn" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_noreturn_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree type = TREE_TYPE (*node); - - /* See FIXME comment in c_common_attribute_table. */ - if (TREE_CODE (*node) == FUNCTION_DECL) - TREE_THIS_VOLATILE (*node) = 1; - else if (TREE_CODE (type) == POINTER_TYPE - && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) - TREE_TYPE (*node) - = build_pointer_type - (build_type_variant (TREE_TYPE (type), - TREE_READONLY (TREE_TYPE (type)), 1)); - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "noinline" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_noinline_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == FUNCTION_DECL) - DECL_UNINLINABLE (*node) = 1; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "always_inline" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_always_inline_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == FUNCTION_DECL) - { - /* Do nothing else, just set the attribute. We'll get at - it later with lookup_attribute. */ - } - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "used" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_used_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == FUNCTION_DECL) - TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (*node)) - = TREE_USED (*node) = 1; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "unused" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_unused_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags; - bool *no_add_attrs; -{ - if (DECL_P (*node)) - { - tree decl = *node; - - if (TREE_CODE (decl) == PARM_DECL - || TREE_CODE (decl) == VAR_DECL - || TREE_CODE (decl) == FUNCTION_DECL - || TREE_CODE (decl) == LABEL_DECL - || TREE_CODE (decl) == TYPE_DECL) - TREE_USED (decl) = 1; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - } - else - { - if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) - *node = build_type_copy (*node); - TREE_USED (*node) = 1; - } - - return NULL_TREE; -} - -/* Handle a "const" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_const_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree type = TREE_TYPE (*node); - - /* See FIXME comment on noreturn in c_common_attribute_table. */ - if (TREE_CODE (*node) == FUNCTION_DECL) - TREE_READONLY (*node) = 1; - else if (TREE_CODE (type) == POINTER_TYPE - && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) - TREE_TYPE (*node) - = build_pointer_type - (build_type_variant (TREE_TYPE (type), 1, - TREE_THIS_VOLATILE (TREE_TYPE (type)))); - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "transparent_union" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_transparent_union_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags; - bool *no_add_attrs; -{ - tree decl = NULL_TREE; - tree *type = NULL; - int is_type = 0; - - if (DECL_P (*node)) - { - decl = *node; - type = &TREE_TYPE (decl); - is_type = TREE_CODE (*node) == TYPE_DECL; - } - else if (TYPE_P (*node)) - type = node, is_type = 1; - - if (is_type - && TREE_CODE (*type) == UNION_TYPE - && (decl == 0 - || (TYPE_FIELDS (*type) != 0 - && TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type))))) - { - if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) - *type = build_type_copy (*type); - TYPE_TRANSPARENT_UNION (*type) = 1; - } - else if (decl != 0 && TREE_CODE (decl) == PARM_DECL - && TREE_CODE (*type) == UNION_TYPE - && TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type))) - DECL_TRANSPARENT_UNION (decl) = 1; - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "constructor" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_constructor_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - tree type = TREE_TYPE (decl); - - if (TREE_CODE (decl) == FUNCTION_DECL - && TREE_CODE (type) == FUNCTION_TYPE - && decl_function_context (decl) == 0) - { - DECL_STATIC_CONSTRUCTOR (decl) = 1; - TREE_USED (decl) = 1; - } - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "destructor" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_destructor_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - tree type = TREE_TYPE (decl); - - if (TREE_CODE (decl) == FUNCTION_DECL - && TREE_CODE (type) == FUNCTION_TYPE - && decl_function_context (decl) == 0) - { - DECL_STATIC_DESTRUCTOR (decl) = 1; - TREE_USED (decl) = 1; - } - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "mode" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_mode_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree type = *node; - - *no_add_attrs = true; - - if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE) - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - else - { - int j; - const char *p = IDENTIFIER_POINTER (TREE_VALUE (args)); - int len = strlen (p); - enum machine_mode mode = VOIDmode; - tree typefm; - - if (len > 4 && p[0] == '_' && p[1] == '_' - && p[len - 1] == '_' && p[len - 2] == '_') - { - char *newp = (char *) alloca (len - 1); - - strcpy (newp, &p[2]); - newp[len - 4] = '\0'; - p = newp; - } - - /* Change this type to have a type with the specified mode. - First check for the special modes. */ - if (! strcmp (p, "byte")) - mode = byte_mode; - else if (!strcmp (p, "word")) - mode = word_mode; - else if (! strcmp (p, "pointer")) - mode = ptr_mode; - else - for (j = 0; j < NUM_MACHINE_MODES; j++) - if (!strcmp (p, GET_MODE_NAME (j))) - mode = (enum machine_mode) j; - - if (mode == VOIDmode) - error ("unknown machine mode `%s'", p); - else if (0 == (typefm = type_for_mode (mode, - TREE_UNSIGNED (type)))) - error ("no data type for mode `%s'", p); - else - *node = typefm; - /* No need to layout the type here. The caller should do this. */ - } - - return NULL_TREE; -} - -/* Handle a "section" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_section_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name ATTRIBUTE_UNUSED; - tree args; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - - if (targetm.have_named_sections) - { - if ((TREE_CODE (decl) == FUNCTION_DECL - || TREE_CODE (decl) == VAR_DECL) - && TREE_CODE (TREE_VALUE (args)) == STRING_CST) - { - if (TREE_CODE (decl) == VAR_DECL - && current_function_decl != NULL_TREE - && ! TREE_STATIC (decl)) - { - error_with_decl (decl, - "section attribute cannot be specified for local variables"); - *no_add_attrs = true; - } - - /* The decl may have already been given a section attribute - from a previous declaration. Ensure they match. */ - else if (DECL_SECTION_NAME (decl) != NULL_TREE - && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)), - TREE_STRING_POINTER (TREE_VALUE (args))) != 0) - { - error_with_decl (*node, - "section of `%s' conflicts with previous declaration"); - *no_add_attrs = true; - } - else - DECL_SECTION_NAME (decl) = TREE_VALUE (args); - } - else - { - error_with_decl (*node, - "section attribute not allowed for `%s'"); - *no_add_attrs = true; - } - } - else - { - error_with_decl (*node, - "section attributes are not supported for this target"); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "aligned" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_aligned_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name ATTRIBUTE_UNUSED; - tree args; - int flags; - bool *no_add_attrs; -{ - tree decl = NULL_TREE; - tree *type = NULL; - int is_type = 0; - tree align_expr = (args ? TREE_VALUE (args) - : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT)); - int i; - - if (DECL_P (*node)) - { - decl = *node; - type = &TREE_TYPE (decl); - is_type = TREE_CODE (*node) == TYPE_DECL; - } - else if (TYPE_P (*node)) - type = node, is_type = 1; - - /* Strip any NOPs of any kind. */ - while (TREE_CODE (align_expr) == NOP_EXPR - || TREE_CODE (align_expr) == CONVERT_EXPR - || TREE_CODE (align_expr) == NON_LVALUE_EXPR) - align_expr = TREE_OPERAND (align_expr, 0); - - if (TREE_CODE (align_expr) != INTEGER_CST) - { - error ("requested alignment is not a constant"); - *no_add_attrs = true; - } - else if ((i = tree_log2 (align_expr)) == -1) - { - error ("requested alignment is not a power of 2"); - *no_add_attrs = true; - } - else if (i > HOST_BITS_PER_INT - 2) - { - error ("requested alignment is too large"); - *no_add_attrs = true; - } - else if (is_type) - { - /* If we have a TYPE_DECL, then copy the type, so that we - don't accidentally modify a builtin type. See pushdecl. */ - if (decl && TREE_TYPE (decl) != error_mark_node - && DECL_ORIGINAL_TYPE (decl) == NULL_TREE) - { - tree tt = TREE_TYPE (decl); - *type = build_type_copy (*type); - DECL_ORIGINAL_TYPE (decl) = tt; - TYPE_NAME (*type) = decl; - TREE_USED (*type) = TREE_USED (decl); - TREE_TYPE (decl) = *type; - } - else if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) - *type = build_type_copy (*type); - - TYPE_ALIGN (*type) = (1 << i) * BITS_PER_UNIT; - TYPE_USER_ALIGN (*type) = 1; - } - else if (TREE_CODE (decl) != VAR_DECL - && TREE_CODE (decl) != FIELD_DECL) - { - error_with_decl (decl, - "alignment may not be specified for `%s'"); - *no_add_attrs = true; - } - else - { - DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT; - DECL_USER_ALIGN (decl) = 1; - } - - return NULL_TREE; -} - -/* Handle a "weak" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_weak_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name ATTRIBUTE_UNUSED; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs ATTRIBUTE_UNUSED; -{ - declare_weak (*node); - - return NULL_TREE; -} - -/* Handle an "alias" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_alias_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - - if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)) - || (TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl))) - { - error_with_decl (decl, - "`%s' defined both normally and as an alias"); - *no_add_attrs = true; - } - else if (decl_function_context (decl) == 0) - { - tree id; - - id = TREE_VALUE (args); - if (TREE_CODE (id) != STRING_CST) - { - error ("alias arg not a string"); - *no_add_attrs = true; - return NULL_TREE; - } - id = get_identifier (TREE_STRING_POINTER (id)); - /* This counts as a use of the object pointed to. */ - TREE_USED (id) = 1; - - if (TREE_CODE (decl) == FUNCTION_DECL) - DECL_INITIAL (decl) = error_mark_node; - else - DECL_EXTERNAL (decl) = 0; - } - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "no_instrument_function" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_no_instrument_function_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - - if (TREE_CODE (decl) != FUNCTION_DECL) - { - error_with_decl (decl, - "`%s' attribute applies only to functions", - IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - else if (DECL_INITIAL (decl)) - { - error_with_decl (decl, - "can't set `%s' attribute after definition", - IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - else - DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1; - - return NULL_TREE; -} - -/* Handle a "malloc" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_malloc_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == FUNCTION_DECL) - DECL_IS_MALLOC (*node) = 1; - /* ??? TODO: Support types. */ - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "no_limit_stack" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_no_limit_stack_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - tree decl = *node; - - if (TREE_CODE (decl) != FUNCTION_DECL) - { - error_with_decl (decl, - "`%s' attribute applies only to functions", - IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - else if (DECL_INITIAL (decl)) - { - error_with_decl (decl, - "can't set `%s' attribute after definition", - IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - else - DECL_NO_LIMIT_STACK (decl) = 1; - - return NULL_TREE; -} - -/* Handle a "pure" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_pure_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - if (TREE_CODE (*node) == FUNCTION_DECL) - DECL_IS_PURE (*node) = 1; - /* ??? TODO: Support types. */ - else - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - *no_add_attrs = true; - } - - return NULL_TREE; -} - -/* Handle a "deprecated" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_deprecated_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args ATTRIBUTE_UNUSED; - int flags; - bool *no_add_attrs; -{ - tree type = NULL_TREE; - int warn = 0; - const char *what = NULL; - - if (DECL_P (*node)) - { - tree decl = *node; - type = TREE_TYPE (decl); - - if (TREE_CODE (decl) == TYPE_DECL - || TREE_CODE (decl) == PARM_DECL - || TREE_CODE (decl) == VAR_DECL - || TREE_CODE (decl) == FUNCTION_DECL - || TREE_CODE (decl) == FIELD_DECL) - TREE_DEPRECATED (decl) = 1; - else - warn = 1; - } - else if (TYPE_P (*node)) - { - if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) - *node = build_type_copy (*node); - TREE_DEPRECATED (*node) = 1; - type = *node; - } - else - warn = 1; - - if (warn) - { - *no_add_attrs = true; - if (type && TYPE_NAME (type)) - { - if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE) - what = IDENTIFIER_POINTER (TYPE_NAME (*node)); - else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL - && DECL_NAME (TYPE_NAME (type))) - what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type))); - } - if (what) - warning ("`%s' attribute ignored for `%s'", - IDENTIFIER_POINTER (name), what); - else - warning ("`%s' attribute ignored", - IDENTIFIER_POINTER (name)); - } - - return NULL_TREE; -} - -/* Handle a "vector_size" attribute; arguments as in - struct attribute_spec.handler. */ - -static tree -handle_vector_size_attribute (node, name, args, flags, no_add_attrs) - tree *node; - tree name; - tree args; - int flags ATTRIBUTE_UNUSED; - bool *no_add_attrs; -{ - unsigned HOST_WIDE_INT vecsize, nunits; - enum machine_mode mode, orig_mode, new_mode; - tree type = *node, new_type; - - *no_add_attrs = true; - - if (! host_integerp (TREE_VALUE (args), 1)) - { - warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name)); - return NULL_TREE; - } - - /* Get the vector size (in bytes). */ - vecsize = tree_low_cst (TREE_VALUE (args), 1); - - /* We need to provide for vector pointers, vector arrays, and - functions returning vectors. For example: - - __attribute__((vector_size(16))) short *foo; - - In this case, the mode is SI, but the type being modified is - HI, so we need to look further. */ - - while (POINTER_TYPE_P (type) - || TREE_CODE (type) == FUNCTION_TYPE - || TREE_CODE (type) == ARRAY_TYPE) - type = TREE_TYPE (type); - - /* Get the mode of the type being modified. */ - orig_mode = TYPE_MODE (type); - - if (TREE_CODE (type) == RECORD_TYPE - || (GET_MODE_CLASS (orig_mode) != MODE_FLOAT - && GET_MODE_CLASS (orig_mode) != MODE_INT) - || ! host_integerp (TYPE_SIZE_UNIT (type), 1)) - { - error ("invalid vector type for attribute `%s'", - IDENTIFIER_POINTER (name)); - return NULL_TREE; - } - - /* Calculate how many units fit in the vector. */ - nunits = vecsize / tree_low_cst (TYPE_SIZE_UNIT (type), 1); - - /* Find a suitably sized vector. */ - new_mode = VOIDmode; - for (mode = GET_CLASS_NARROWEST_MODE (GET_MODE_CLASS (orig_mode) == MODE_INT - ? MODE_VECTOR_INT - : MODE_VECTOR_FLOAT); - mode != VOIDmode; - mode = GET_MODE_WIDER_MODE (mode)) - if (vecsize == GET_MODE_SIZE (mode) - && nunits == (unsigned HOST_WIDE_INT) GET_MODE_NUNITS (mode)) - { - new_mode = mode; - break; - } - - if (new_mode == VOIDmode) - error ("no vector mode with the size and type specified could be found"); - else - { - new_type = type_for_mode (new_mode, TREE_UNSIGNED (type)); - if (!new_type) - error ("no vector mode with the size and type specified could be found"); - else - /* Build back pointers if needed. */ - *node = vector_size_helper (*node, new_type); - } - - return NULL_TREE; -} - -/* HACK. GROSS. This is absolutely disgusting. I wish there was a - better way. - - If we requested a pointer to a vector, build up the pointers that - we stripped off while looking for the inner type. Similarly for - return values from functions. - - The argument "type" is the top of the chain, and "bottom" is the - new type which we will point to. */ - -static tree -vector_size_helper (type, bottom) - tree type, bottom; -{ - tree inner, outer; - - if (POINTER_TYPE_P (type)) - { - inner = vector_size_helper (TREE_TYPE (type), bottom); - outer = build_pointer_type (inner); - } - else if (TREE_CODE (type) == ARRAY_TYPE) - { - inner = vector_size_helper (TREE_TYPE (type), bottom); - outer = build_array_type (inner, TYPE_VALUES (type)); - } - else if (TREE_CODE (type) == FUNCTION_TYPE) - { - inner = vector_size_helper (TREE_TYPE (type), bottom); - outer = build_function_type (inner, TYPE_VALUES (type)); - } - else - return bottom; - - TREE_READONLY (outer) = TREE_READONLY (type); - TREE_THIS_VOLATILE (outer) = TREE_THIS_VOLATILE (type); - - return outer; -} - /* Split SPECS_ATTRS, a list of declspecs and prefix attributes, into two lists. SPECS_ATTRS may also be just a typespec (eg: RECORD_TYPE). @@ -1375,7 +322,7 @@ split_specs_attrs (specs_attrs, declspecs, prefix_attributes) tree t, s, a, next, specs, attrs; /* This can happen after an __extension__ in pedantic mode. */ - if (specs_attrs != NULL_TREE + if (specs_attrs != NULL_TREE && TREE_CODE (specs_attrs) == INTEGER_CST) { *declspecs = NULL_TREE; |
