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/* Header file for grange gimple statement implementation.
Copyright (C) 2019 Free Software Foundation, Inc.
Contributed by Andrew MacLeod <amacleod@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_GRANGE_H
#define GCC_GRANGE_H
#include "range.h"
#include "range-op.h"
// Gimple statement which supports range_op operations.
// This can map to gimple assign or cond statements, so quick access to the
// operands is provided so the user does not need to know which it is.
// Also provides access to the range operator interface taking care of
// filling in unary operand requirements from the statement.
//
// usage is typical gimple statement style:
// foo (gimple *s)
// {
// grange_op gr = s;
// if (!gr)
// return false; // NULL means this stmt cannot generate ranges.
// < ...decide on some ranges... >
// /* And call the range fold routine for this statement. */
// return gr->fold (res_range, op1_range, op2_range);
class GTY((tag("GCC_SSA_RANGE_OPERATOR")))
grange_op: public gimple
{
public:
// Adds no new fields, adds invariant
// stmt->code == GIMPLE_ASSIGN || stmt->code == GIMPLE_COND
// and there is a range_operator handler for gimple_expr_code().
tree lhs () const;
tree operand1 () const;
tree operand2 () const;
bool fold (irange &res, const irange &r1) const;
bool calc_op1_irange (irange &r, const irange &lhs_range) const;
bool fold (irange &res, const irange &r1, const irange &r2) const;
bool calc_op1_irange (irange &r, const irange &lhs_range,
const irange &op2_range) const;
bool calc_op2_irange (irange &r, const irange &lhs_range,
const irange &op1_range) const;
private:
// Range-op IL agnostic range calculations handler.
class range_operator *handler() const;
// IL contextual range information adjustments handler.
class grange_adjust *grange_adjust_handler () const;
};
// Return the LHS of this statement. If there isn't a LHS return NULL_TREE.
inline tree
grange_op::lhs () const
{
if (gimple_code (this) == GIMPLE_ASSIGN)
return gimple_assign_lhs (this);
return NULL_TREE;
}
// Return the second operand of this statement, otherwise return NULL_TREE.
inline tree
grange_op::operand2 () const
{
if (gimple_code (this) == GIMPLE_COND)
return gimple_cond_rhs (this);
// At this point it must be an assignemnt statement.
if (gimple_num_ops (this) >= 3)
return gimple_assign_rhs2 (this);
return NULL_TREE;
}
template <>
template <>
inline bool
is_a_helper <const grange_op *>::test (const gimple *gs)
{
extern grange_adjust *gimple_range_adjust_handler (enum tree_code c);
// Supported statement kind and there is a handler for the expression code.
if (dyn_cast<const gassign *> (gs) || dyn_cast<const gcond *>(gs))
{
enum tree_code c = gimple_expr_code (gs);
return range_op_handler (c) || gimple_range_adjust_handler (c);
}
return false;
}
template <>
template <>
inline bool
is_a_helper <grange_op *>::test (gimple *gs)
{
extern grange_adjust *gimple_range_adjust_handler (enum tree_code c);
// Supported statement kind and there is a handler for the expression code.
// Supported statement kind and there is a handler for the expression code.
if (dyn_cast<gassign *> (gs) || dyn_cast<gcond *>(gs))
{
enum tree_code c = gimple_expr_code (gs);
return range_op_handler (c) || gimple_range_adjust_handler (c);
}
return false;
}
#endif // GCC_GRANGE_H
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