345 lines
9.1 KiB
C
345 lines
9.1 KiB
C
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/* Gimple simplify definitions.
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Copyright (C) 2011-2019 Free Software Foundation, Inc.
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Contributed by Richard Guenther <rguenther@suse.de>
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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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GIMPLE_MATCH_H
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#define GCC_GIMPLE_MATCH_H
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/* Helper to transparently allow tree codes and builtin function codes
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exist in one storage entity. */
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class code_helper
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{
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public:
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code_helper () {}
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code_helper (tree_code code) : rep ((int) code) {}
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code_helper (combined_fn fn) : rep (-(int) fn) {}
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operator tree_code () const { return (tree_code) rep; }
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operator combined_fn () const { return (combined_fn) -rep; }
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bool is_tree_code () const { return rep > 0; }
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bool is_fn_code () const { return rep < 0; }
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int get_rep () const { return rep; }
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private:
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int rep;
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};
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/* Represents the condition under which an operation should happen,
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and the value to use otherwise. The condition applies elementwise
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(as for VEC_COND_EXPR) if the values are vectors. */
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struct gimple_match_cond
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{
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enum uncond { UNCOND };
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/* Build an unconditional op. */
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gimple_match_cond (uncond) : cond (NULL_TREE), else_value (NULL_TREE) {}
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gimple_match_cond (tree, tree);
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gimple_match_cond any_else () const;
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/* The condition under which the operation occurs, or NULL_TREE
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if the operation is unconditional. */
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tree cond;
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/* The value to use when the condition is false. This is NULL_TREE if
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the operation is unconditional or if the value doesn't matter. */
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tree else_value;
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};
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inline
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gimple_match_cond::gimple_match_cond (tree cond_in, tree else_value_in)
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: cond (cond_in), else_value (else_value_in)
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{
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}
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/* Return a gimple_match_cond with the same condition but with an
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arbitrary ELSE_VALUE. */
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inline gimple_match_cond
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gimple_match_cond::any_else () const
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{
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return gimple_match_cond (cond, NULL_TREE);
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}
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/* Represents an operation to be simplified, or the result of the
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simplification. */
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struct gimple_match_op
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{
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gimple_match_op ();
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gimple_match_op (const gimple_match_cond &, code_helper, tree, unsigned int);
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gimple_match_op (const gimple_match_cond &,
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code_helper, tree, tree);
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gimple_match_op (const gimple_match_cond &,
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code_helper, tree, tree, tree);
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gimple_match_op (const gimple_match_cond &,
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code_helper, tree, tree, tree, tree);
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gimple_match_op (const gimple_match_cond &,
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code_helper, tree, tree, tree, tree, tree);
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gimple_match_op (const gimple_match_cond &,
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code_helper, tree, tree, tree, tree, tree, tree);
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void set_op (code_helper, tree, unsigned int);
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void set_op (code_helper, tree, tree);
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void set_op (code_helper, tree, tree, tree);
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void set_op (code_helper, tree, tree, tree, tree);
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void set_op (code_helper, tree, tree, tree, tree, bool);
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void set_op (code_helper, tree, tree, tree, tree, tree);
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void set_op (code_helper, tree, tree, tree, tree, tree, tree);
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void set_value (tree);
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tree op_or_null (unsigned int) const;
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/* The maximum value of NUM_OPS. */
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static const unsigned int MAX_NUM_OPS = 5;
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/* The conditions under which the operation is performed, and the value to
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use as a fallback. */
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gimple_match_cond cond;
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/* The operation being performed. */
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code_helper code;
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/* The type of the result. */
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tree type;
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/* For a BIT_FIELD_REF, whether the group of bits is stored in reverse order
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from the target order. */
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bool reverse;
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/* The number of operands to CODE. */
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unsigned int num_ops;
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/* The operands to CODE. Only the first NUM_OPS entries are meaningful. */
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tree ops[MAX_NUM_OPS];
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};
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inline
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gimple_match_op::gimple_match_op ()
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: cond (gimple_match_cond::UNCOND), type (NULL_TREE), reverse (false),
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num_ops (0)
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{
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}
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/* Constructor that takes the condition, code, type and number of
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operands, but leaves the caller to fill in the operands. */
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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unsigned int num_ops_in)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (num_ops_in)
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{
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}
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/* Constructors for various numbers of operands. */
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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tree op0)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (1)
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{
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ops[0] = op0;
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}
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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tree op0, tree op1)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (2)
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{
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ops[0] = op0;
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ops[1] = op1;
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}
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (3)
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{
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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}
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2, tree op3)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (4)
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{
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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ops[3] = op3;
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}
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inline
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gimple_match_op::gimple_match_op (const gimple_match_cond &cond_in,
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code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2, tree op3,
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tree op4)
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: cond (cond_in), code (code_in), type (type_in), reverse (false),
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num_ops (5)
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{
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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ops[3] = op3;
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ops[4] = op4;
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}
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/* Change the operation performed to CODE_IN, the type of the result to
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TYPE_IN, and the number of operands to NUM_OPS_IN. The caller needs
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to set the operands itself. */
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in,
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unsigned int num_ops_in)
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{
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code = code_in;
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type = type_in;
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num_ops = num_ops_in;
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}
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/* Functions for changing the operation performed, for various numbers
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of operands. */
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in, tree op0)
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{
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code = code_in;
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type = type_in;
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num_ops = 1;
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ops[0] = op0;
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}
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in, tree op0, tree op1)
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{
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code = code_in;
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type = type_in;
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num_ops = 2;
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ops[0] = op0;
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ops[1] = op1;
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}
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2)
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{
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code = code_in;
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type = type_in;
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num_ops = 3;
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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}
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2, bool reverse_in)
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{
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code = code_in;
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type = type_in;
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reverse = reverse_in;
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num_ops = 3;
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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}
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2, tree op3)
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{
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code = code_in;
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type = type_in;
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num_ops = 4;
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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ops[3] = op3;
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}
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inline void
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gimple_match_op::set_op (code_helper code_in, tree type_in,
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tree op0, tree op1, tree op2, tree op3, tree op4)
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{
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code = code_in;
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type = type_in;
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num_ops = 5;
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ops[0] = op0;
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ops[1] = op1;
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ops[2] = op2;
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ops[3] = op3;
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ops[4] = op4;
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}
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/* Set the "operation" to be the single value VALUE, such as a constant
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or SSA_NAME. */
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inline void
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gimple_match_op::set_value (tree value)
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{
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set_op (TREE_CODE (value), TREE_TYPE (value), value);
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}
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/* Return the value of operand I, or null if there aren't that many
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operands. */
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inline tree
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gimple_match_op::op_or_null (unsigned int i) const
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{
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return i < num_ops ? ops[i] : NULL_TREE;
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}
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/* Return whether OP is a non-expression result and a gimple value. */
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inline bool
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gimple_simplified_result_is_gimple_val (const gimple_match_op *op)
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{
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return (op->code.is_tree_code ()
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&& (TREE_CODE_LENGTH ((tree_code) op->code) == 0
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|| ((tree_code) op->code) == ADDR_EXPR)
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&& is_gimple_val (op->ops[0]));
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}
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extern tree (*mprts_hook) (gimple_match_op *);
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bool gimple_simplify (gimple *, gimple_match_op *, gimple_seq *,
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tree (*)(tree), tree (*)(tree));
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bool gimple_resimplify1 (gimple_seq *, gimple_match_op *, tree (*)(tree));
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bool gimple_resimplify2 (gimple_seq *, gimple_match_op *, tree (*)(tree));
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bool gimple_resimplify3 (gimple_seq *, gimple_match_op *, tree (*)(tree));
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bool gimple_resimplify4 (gimple_seq *, gimple_match_op *, tree (*)(tree));
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bool gimple_resimplify5 (gimple_seq *, gimple_match_op *, tree (*)(tree));
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tree maybe_push_res_to_seq (gimple_match_op *, gimple_seq *,
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tree res = NULL_TREE);
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void maybe_build_generic_op (gimple_match_op *);
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#endif /* GCC_GIMPLE_MATCH_H */
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