Table-driven attributes.

	* c-decl.c, config/alpha/alpha.c, config/arc/arc.c,
	config/arm/arm.c, config/arm/pe.c, config/avr/avr.c,
	config/avr/avr.h, config/d30v/d30v.h, config/fr30/fr30.h,
	config/h8300/h8300.c, config/i386/cygwin.h, config/i386/winnt.c,
	config/m32r/m32r.c, config/mcore/mcore.c, config/sh/sh.c,
	config/stormy16/stormy16.h, config/v850/v850.c, doc/c-tree.texi,
	doc/tm.texi, ggc-common.c, integrate.c, print-tree.c, tree.c,
	tree.h: Rename DECL_MACHINE_ATTRIBUTES to DECL_ATTRIBUTES.
	* tree.h (struct tree_decl): Change machine_attributes to
	attributes.
	* doc/c-tree.texi: Document that all attributes are now attached
	to decls and types.
	* c-common.c (add_attribute, attrtab, attrtab_idx,
	default_valid_lang_attribute, valid_lang_attribute): Remove.
	(attribute_tables, attributes_initialized,
	c_common_attribute_table, default_lang_attribute_table): New
	variables.
	(handle_packed_attribute, handle_nocommon_attribute,
	handle_common_attribute, handle_noreturn_attribute,
	handle_unused_attribute, handle_const_attribute,
	handle_transparent_union_attribute, handle_constructor_attribute,
	handle_destructor_attribute, handle_mode_attribute,
	handle_section_attribute, handle_aligned_attribute,
	handle_weak_attribute, handle_alias_attribute,
	handle_no_instrument_function_attribute,
	handle_no_check_memory_usage_attribute, handle_malloc_attribute,
	handle_no_limit_stack_attribute, handle_pure_attribute): New
	functions.
	(init_attributes, decl_attributes): Rewrite to implement
	table-driven attributes.
	* c-common.h (enum attribute_flags): Move to tree.h.
	* c-format.c (decl_handle_format_attribute,
	decl_handle_format_arg_attribute): Rename to
	handle_format_attribute and handle_format_arg_attribute.  Update
	for table-driven attributes.
	* c-common.h (decl_handle_format_attribute,
	decl_handle_format_arg_attribute): Remove prototypes.
	(handle_format_attribute, handle_format_arg_attribute): Add
	prototypes.
	* c-decl.c (grokdeclarator): Handle attributes nested inside
	declarators.
	* c-parse.in (setattrs, maybe_setattrs): Remove.
	(maybe_type_quals_setattrs): Rename to maybe_type_quals_attrs.
	Update to handle nested attributes properly.
	(maybe_resetattrs, after_type_declarator,
	parm_declarator_nostarttypename, notype_declarator, absdcl1_noea,
	absdcl1_ea, direct_absdcl1): Update to handle nested attributes
	properly.
	(make_pointer_declarator): Update to handle nested attributes
	properly.
	* doc/extend.texi: Update documentation of limits of attributes
	syntax.  Warn about problems with attribute semantics in C++.
	* target.h (struct target): Remove valid_decl_attribute and
	valid_type_attribute.  Add attribute_table and
	function_attribute_inlinable_p.
	* target-def.h (TARGET_VALID_DECL_ATTRIBUTE,
	TARGET_VALID_TYPE_ATTRIBUTE): Remove.
	(TARGET_ATTRIBUTE_TABLE, TARGET_FUNCTION_ATTRIBUTE_INLINABLE_P):
	Add.
	(TARGET_INITIALIZER): Update.
	* integrate.c (FUNCTION_ATTRIBUTE_INLINABLE_P): Remove default
	definition.
	(function_attribute_inlinable_p): New function.  Check for the
	presence of any machine attributes before using
	targetm.function_attribute_inlinable_p.
	(function_cannot_inline_p): Update.
	* Makefile.in (integrate.o): Update dependencies.
	* doc/tm.texi: Update documentation of target attributes and
	example definition of TARGET_VALID_TYPE_ATTRIBUTE.
	* tree.c (default_valid_attribute_p, valid_machine_attribute):
	Remove.
	(default_target_attribute_table,
	default_function_attribute_inlinable_p): New.
	(lookup_attribute): Update comment to clarify handling of multiple
	attributes with the same name.
	(merge_attributes, attribute_list_contained): Allow multiple
	attributes with the same name but different arguments to appear in
	the same attribute list.
	* tree.h (default_valid_attribute_p): Remove prototype.
	(struct attribute_spec): New.
	(default_target_attribute_table): Declare.
	(enum attribute_flags): Move from c-common.h.  Add
	ATTR_FLAG_TYPE_IN_PLACE.
	(default_function_attribute_inlinable_p): Declare.
	* config/alpha/alpha.c (vms_valid_decl_attribute_p): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(vms_attribute_table): New.
	* config/arc/arc.c (arc_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(arc_attribute_table, arc_handle_interrupt_attribute): New.
	* config/arm/arm.c (arm_valid_type_attribute_p,
	arm_valid_decl_attribute_p, arm_pe_valid_decl_attribute_p):
	Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE, TARGET_VALID_DECL_ATTRIBUTE): Don't
	define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(arm_attribute_table, arm_handle_fndecl_attribute,
	arm_handle_isr_attribute): New.
	* config/avr/avr.c (avr_valid_type_attribute,
	avr_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE, TARGET_VALID_TYPE_ATTRIBUTE): Don't
	define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(avr_attribute_table, avr_handle_progmem_attribute,
	avr_handle_fndecl_attribute): New.
	* config/c4x/c4x.c (c4x_valid_type_attribute_p): Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(c4x_attribute_table, c4x_handle_fntype_attribute): New.
	* config/h8300/h8300.c (h8300_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(h8300_attribute_table, h8300_handle_fndecl_attribute,
	h8300_handle_eightbit_data_attribute,
	h8300_handle_tiny_data_attribute): New.
	* config/i386/i386-protos.h (ix86_valid_type_attribute_p,
	i386_pe_valid_decl_attribute_p, i386_pe_valid_type_attribute_p):
	Remove prototypes.
	(ix86_handle_dll_attribute, ix86_handle_shared_attribute): New
	declarations.
	* config/i386/i386.c (ix86_valid_type_attribute_p: Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE, TARGET_VALID_DECL_ATTRIBUTE): Don't
	define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(ix86_attribute_table, ix86_handle_cdecl_attribute,
	ix86_handle_regparm_attribute): New.
	* config/i386/winnt.c (i386_pe_valid_decl_attribute_p,
	i386_pe_valid_type_attribute_p): Remove.
	(ix86_handle_dll_attribute, ix86_handle_shared_attribute): New.
	* config/ia64/ia64.c (ia64_valid_type_attribute): Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(ia64_attribute_table): New.
	* config/m32r/m32r.c (m32r_valid_decl_attribute, interrupt_ident1,
	interrupt_ident2, model_ident1, model_ident2): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(init_idents): Update.
	(m32r_attribute_table, m32r_handle_model_attribute): New.
	* config/m68hc11/m68hc11.c (m68hc11_valid_type_attribute_p):
	Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(m68hc11_attribute_table, m68hc11_handle_fntype_attribute): New.
	* config/mcore/mcore.c (mcore_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(mcore_attribute_table, mcore_handle_naked_attribute): New.
	* config/ns32k/ns32k.c (ns32k_valid_type_attribute_p): Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(ns32k_attribute_table, ns32k_handle_fntype_attribute): New.
	* config/rs6000/rs6000.c (rs6000_valid_type_attribute_p): Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(rs6000_attribute_table, rs6000_handle_longcall_attribute): New.
	* config/sh/sh.c (sh_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(sh_attribute_table, sh_handle_interrupt_handler_attribute,
	sh_handle_sp_switch_attribute, sh_handle_trap_exit_attribute):
	New.
	* config/stormy16/stormy16.c (stormy16_valid_type_attribute):
	Remove.
	(TARGET_VALID_TYPE_ATTRIBUTE): Don't define
	(TARGET_ATTRIBUTE_TABLE): Define.
	(stormy16_attribute_table, stormy16_handle_interrupt_attribute):
	New.
	* config/v850/v850.c (v850_valid_decl_attribute): Remove.
	(TARGET_VALID_DECL_ATTRIBUTE): Don't define.
	(TARGET_ATTRIBUTE_TABLE): Define.
	(v850_attribute_table, v850_handle_interrupt_attribute,
	v850_handle_data_area_attribute): New.
	* config/v850/v850-c.c (mark_current_function_as_interrupt):
	Return void.  Call decl_attributes instead of
	valid_machine_attribute.

cp:
	Table-driven attributes.
	* decl.c: Rename DECL_MACHINE_ATTRIBUTES to DECL_ATTRIBUTES.
	* decl2.c (cplus_decl_attributes): Only take one attributes
	parameter.
	* cp-tree.c (cplus_decl_attributes): Update prototype.
	* class.c (finish_struct), decl.c (start_decl, start_function),
	decl2.c (grokfield), friend.c (do_friend), parse.y
	(parse_bitfield): Update calls to cplus_decl_attributes.
	* decl.c (grokdeclarator): Take a pointer to a single ordinary
	attribute list.
	* decl.h (grokdeclarator): Update prototype.
	* decl2.c (grokfield): Take a single ordinary attribute list.
	* friend.c (do_friend): Likewise.
	* decl.c (shadow_tag, groktypename, start_decl,
	start_handler_parms, grokdeclarator, grokparms, start_function,
	start_method), decl2.c (grokfield, grokbitfield, grokoptypename),
	parse.y (parse_field, parse_bitfield, component_decl_1), pt.c
	(process_template_parm, do_decl_instantiation): Pass single
	ordinary attribute lists around.
	* decl.c (grokdeclarator): Correct handling of nested attributes.
	Revert the patch
	1998-10-18  Jason Merrill  <jason@yorick.cygnus.com>
		* decl.c (grokdeclarator): Embedded attrs bind to the right,
		not the left.
	.
	* cp-tree.h (cp_valid_lang_attribute): Remove declaration
	(cp_attribute_table): Declare.
	* decl.c (valid_lang_attribute): Don't define.
	(lang_attribute_table): Define.
	(init_decl_processing): Initialize lang_attribute_table instead of
	valid_lang_attribute.
	* tree.c (cp_valid_lang_attribute): Remove.
	(handle_java_interface_attribute, handle_com_interface_attribute,
	handle_init_priority_attribute): New functions.
	(cp_attribute_table): New array.
	* decl2.c (import_export_class): Don't use
	targetm.valid_type_attribute.

testsuite:
	Table-driven attributes.
	* g++.dg/ext/attrib1.C: New test.

From-SVN: r45718

1 files changed, 34 insertions, 9 deletions

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 0834496..ea60b57 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -2449,6 +2449,14 @@ language.  Some details may vary for C++ and Objective-C@.  Because of
 infelicities in the grammar for attributes, some forms described here
 may not be successfully parsed in all cases.
 
+There are some problems with the semantics of attributes in C++.  For
+example, there are no manglings for attributes, although they may affect
+code generation, so problems may arise when attributed types are used in
+conjunction with templates or overloading.  Similarly, @code{typeid}
+does not distinguish between types with different attributes.  Support
+for attributes in C++ may be restricted in future to attributes on
+declarations only, but not on nested declarators.
+
 @xref{Function Attributes}, for details of the semantics of attributes
 applying to functions.  @xref{Variable Attributes}, for details of the
 semantics of attributes applying to variables.  @xref{Type Attributes},
@@ -2520,9 +2528,8 @@ defined is not complete until after the attribute specifiers.
 Otherwise, an attribute specifier appears as part of a declaration,
 counting declarations of unnamed parameters and type names, and relates
 to that declaration (which may be nested in another declaration, for
-example in the case of a parameter declaration).  In future, attribute
-specifiers in some places may however apply to a particular declarator
-within a declaration instead; these cases are noted below.  Where an
+example in the case of a parameter declaration), or to a particular declarator
+within a declaration.  Where an
 attribute specifier is applied to a parameter declared as a function or
 an array, it should apply to the function or array rather than the
 pointer to which the parameter is implicitly converted, but this is not
@@ -2597,11 +2604,11 @@ ignored.
 
 An attribute specifier list may appear at the start of a nested
 declarator.  At present, there are some limitations in this usage: the
-attributes apply to the identifier declared, rather than to a specific
-declarator.  When attribute specifiers follow the @code{*} of a pointer
+attributes correctly apply to the declarator, but for most individual
+attributes the semantics this implies are not implemented.
+When attribute specifiers follow the @code{*} of a pointer
 declarator, they may be mixed with any type qualifiers present.
-The following describes intended future
-semantics which make this syntax more useful only.  It will make the
+The following describes the formal semantics of this syntax.  It will make the
 most sense if you are familiar with the formal specification of
 declarators in the ISO C standard.
 
@@ -2642,8 +2649,26 @@ char *__attribute__((aligned(8))) *f;
 
 @noindent
 specifies the type ``pointer to 8-byte-aligned pointer to @code{char}''.
-Note again that this describes intended future semantics, not current
-implementation.
+Note again that this does not work with most attributes; for example,
+the usage of @samp{aligned} and @samp{noreturn} attributes given above
+is not yet supported.
+
+For compatibility with existing code written for compiler versions that
+did not implement attributes on nested declarators, some laxity is
+allowed in the placing of attributes.  If an attribute that only applies
+to types is applied to a declaration, it will be treated as applying to
+the type of that declaration.  If an attribute that only applies to
+declarations is applied to the type of a declaration, it will be treated
+as applying to that declaration; and, for compatibility with code
+placing the attributes immediately before the identifier declared, such
+an attribute applied to a function return type will be treated as
+applying to the function type, and such an attribute applied to an array
+element type will be treated as applying to the array type.  If an
+attribute that only applies to function types is applied to a
+pointer-to-function type, it will be treated as applying to the pointer
+target type; if such an attribute is applied to a function return type
+that is not a pointer-to-function type, it will be treated as applying
+to the function type.
 
 @node Function Prototypes
 @section Prototypes and Old-Style Function Definitions