alias.h File Reference

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Macros
#define	ALIAS_SET_MEMORY_BARRIER   ((alias_set_type) -1)

Typedefs
typedef int	alias_set_type

Functions
alias_set_type	new_alias_set (void)
alias_set_type	get_alias_set (tree)
alias_set_type	get_deref_alias_set (tree)
alias_set_type	get_varargs_alias_set (void)
alias_set_type	get_frame_alias_set (void)
tree	component_uses_parent_alias_set_from (const_tree)
bool	alias_set_subset_of (alias_set_type, alias_set_type)
void	record_alias_subset (alias_set_type, alias_set_type)
void	record_component_aliases (tree)
int	alias_sets_conflict_p (alias_set_type, alias_set_type)
int	alias_sets_must_conflict_p (alias_set_type, alias_set_type)
int	objects_must_conflict_p (tree, tree)
int	nonoverlapping_memrefs_p (const_rtx, const_rtx, bool)
tree	reference_alias_ptr_type (tree)
bool	alias_ptr_types_compatible_p (tree, tree)

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Macro Definition Documentation

#define ALIAS_SET_MEMORY_BARRIER   ((alias_set_type) -1)

This alias set can be used to force a memory to conflict with all other memories, creating a barrier across which no memory reference can move. Note that there are other legacy ways to create such memory barriers, including an address of SCRATCH.

Referenced by decl_for_component_ref().

---

Typedef Documentation

typedef int alias_set_type

Exported functions from alias.c Copyright (C) 2004-2013 Free Software Foundation, Inc.

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 3, or (at your option) any later version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see http://www.gnu.org/licenses/. The type of an alias set. Code currently assumes that variables of this type can take the values 0 (the alias set which aliases everything) and -1 (sometimes indicating that the alias set is unknown, sometimes indicating a memory barrier) and -2 (indicating that the alias set should be set to a unique value but has not been set yet).

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Function Documentation

bool alias_ptr_types_compatible_p	(	tree	,
		tree
	)

bool alias_set_subset_of	(	alias_set_type	,
		alias_set_type
	)

int alias_sets_conflict_p	(	alias_set_type	,
		alias_set_type
	)

int alias_sets_must_conflict_p	(	alias_set_type	,
		alias_set_type
	)

tree component_uses_parent_alias_set_from

(

const_tree

)

alias_set_type get_alias_set

(

tree

)

alias_set_type get_deref_alias_set

(

tree

)

alias_set_type get_frame_alias_set

(

void

)

alias_set_type get_varargs_alias_set

(

void

)

We now lower VA_ARG_EXPR, and there's currently no way to attach the varargs alias set to an INDIRECT_REF (FIXME!), so we can't consistently use the varargs alias set for loads from the varargs area. So don't use it anywhere.

References DF_REG_DEF_COUNT.

alias_set_type new_alias_set

(

void

)

Return a brand-new alias set.

References BINFO_BASE_ITERATE, BINFO_TYPE, DECL_CHAIN, DECL_NONADDRESSABLE_P, get_alias_set(), record_alias_subset(), TREE_CODE, TREE_TYPE, TYPE_BINFO, and TYPE_FIELDS.

int nonoverlapping_memrefs_p	(	const_rtx	,
		const_rtx	,
		bool
	)

int objects_must_conflict_p	(	tree	,
		tree
	)

void record_alias_subset	(	alias_set_type	,
		alias_set_type
	)

void record_component_aliases

(

tree

)

tree reference_alias_ptr_type

(

tree

)