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/* Infrastructure for tracking user variable locations and values
throughout compilation.
Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>.
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/>. */
#ifndef GCC_VALTRACK_H
#define GCC_VALTRACK_H
#include "bitmap.h"
#include "df.h"
#include "rtl.h"
#include "basic-block.h"
/* Debug uses of dead regs. */
/* Node of a linked list of uses of dead REGs in debug insns. */
struct dead_debug_use
{
df_ref use;
struct dead_debug_use *next;
};
/* Linked list of the above, with a bitmap of the REGs in the
list. */
struct dead_debug
{
struct dead_debug_use *head;
bitmap used;
bitmap to_rescan;
};
/* This type controls the behavior of dead_debug_insert_temp WRT
UREGNO and INSN. */
enum debug_temp_where
{
/* Bind a newly-created debug temporary to a REG for UREGNO, and
insert the debug insn before INSN. REG is expected to die at
INSN. */
DEBUG_TEMP_BEFORE_WITH_REG = -1,
/* Bind a newly-created debug temporary to the value INSN stores
in REG, and insert the debug insn before INSN. */
DEBUG_TEMP_BEFORE_WITH_VALUE = 0,
/* Bind a newly-created debug temporary to a REG for UREGNO, and
insert the debug insn after INSN. REG is expected to be set at
INSN. */
DEBUG_TEMP_AFTER_WITH_REG = 1
};
extern void dead_debug_init (struct dead_debug *, bitmap);
extern void dead_debug_finish (struct dead_debug *, bitmap);
extern void dead_debug_add (struct dead_debug *, df_ref, unsigned int);
extern int dead_debug_insert_temp (struct dead_debug *,
unsigned int uregno, rtx insn,
enum debug_temp_where);
extern void propagate_for_debug (rtx, rtx, rtx, rtx, basic_block);
#endif /* GCC_VALTRACK_H */
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