84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/* IPA handling of references.
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Copyright (C) 2004-2005 Free Software Foundation, Inc.
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Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef GCC_IPA_REFERENCE_H
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#define GCC_IPA_REFERENCE_H
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#include "bitmap.h"
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#include "tree.h"
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/* The static variables defined within the compilation unit that are
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loaded or stored directly by function that owns this structure. */
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struct ipa_reference_local_vars_info_d
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{
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bitmap statics_read;
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bitmap statics_written;
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/* Set when this function calls another function external to the
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compilation unit or if the function has a asm clobber of memory.
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In general, such calls are modeled as reading and writing all
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variables (both bits on) but sometime there are attributes on the
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called function so we can do better. */
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bool calls_read_all;
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bool calls_write_all;
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};
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struct ipa_reference_global_vars_info_d
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{
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bitmap statics_read;
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bitmap statics_written;
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bitmap statics_not_read;
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bitmap statics_not_written;
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};
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/* Statics that are read and written by some set of functions. The
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local ones are based on the loads and stores local to the function.
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The global ones are based on the local info as well as the
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transitive closure of the functions that are called. The
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structures are separated to allow the global structures to be
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shared between several functions since every function within a
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strongly connected component will have the same information. This
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sharing saves both time and space in the computation of the vectors
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as well as their translation from decl_uid form to ann_uid
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form. */
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typedef struct ipa_reference_local_vars_info_d *ipa_reference_local_vars_info_t;
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typedef struct ipa_reference_global_vars_info_d *ipa_reference_global_vars_info_t;
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struct ipa_reference_vars_info_d
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{
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ipa_reference_local_vars_info_t local;
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ipa_reference_global_vars_info_t global;
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};
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typedef struct ipa_reference_vars_info_d *ipa_reference_vars_info_t;
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/* In ipa-reference.c */
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bitmap ipa_reference_get_read_local (tree fn);
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bitmap ipa_reference_get_written_local (tree fn);
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bitmap ipa_reference_get_read_global (tree fn);
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bitmap ipa_reference_get_written_global (tree fn);
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bitmap ipa_reference_get_not_read_global (tree fn);
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bitmap ipa_reference_get_not_written_global (tree fn);
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#endif /* GCC_IPA_REFERENCE_H */
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