/usr/lib/gcc-cross/sh4-linux-gnu/8/plugin/include/tree-ssa-propagate.h is in gcc-8-plugin-dev-sh4-linux-gnu 8-20180414-1ubuntu2cross1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | /* Data structures and function declarations for the SSA value propagation
engine.
Copyright (C) 2004-2018 Free Software Foundation, Inc.
Contributed by Diego Novillo <dnovillo@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 _TREE_SSA_PROPAGATE_H
#define _TREE_SSA_PROPAGATE_H 1
/* If SIM_P is true, statement S will be simulated again. */
static inline void
prop_set_simulate_again (gimple *s, bool visit_p)
{
gimple_set_visited (s, visit_p);
}
/* Return true if statement T should be simulated again. */
static inline bool
prop_simulate_again_p (gimple *s)
{
return gimple_visited_p (s);
}
/* Lattice values used for propagation purposes. Specific instances
of a propagation engine must return these values from the statement
and PHI visit functions to direct the engine. */
enum ssa_prop_result {
/* The statement produces nothing of interest. No edges will be
added to the work lists. */
SSA_PROP_NOT_INTERESTING,
/* The statement produces an interesting value. The set SSA_NAMEs
returned by SSA_PROP_VISIT_STMT should be added to
INTERESTING_SSA_EDGES. If the statement being visited is a
conditional jump, SSA_PROP_VISIT_STMT should indicate which edge
out of the basic block should be marked executable. */
SSA_PROP_INTERESTING,
/* The statement produces a varying (i.e., useless) value and
should not be simulated again. If the statement being visited
is a conditional jump, all the edges coming out of the block
will be considered executable. */
SSA_PROP_VARYING
};
extern bool valid_gimple_rhs_p (tree);
extern void move_ssa_defining_stmt_for_defs (gimple *, gimple *);
extern bool update_gimple_call (gimple_stmt_iterator *, tree, int, ...);
extern bool update_call_from_tree (gimple_stmt_iterator *, tree);
extern bool stmt_makes_single_store (gimple *);
extern bool may_propagate_copy (tree, tree);
extern bool may_propagate_copy_into_stmt (gimple *, tree);
extern bool may_propagate_copy_into_asm (tree);
extern void propagate_value (use_operand_p, tree);
extern void replace_exp (use_operand_p, tree);
extern void propagate_tree_value (tree *, tree);
extern void propagate_tree_value_into_stmt (gimple_stmt_iterator *, tree);
/* Public interface into the SSA propagation engine. Clients should inherit
from this class and provide their own visitors. */
class ssa_propagation_engine
{
public:
virtual ~ssa_propagation_engine (void) { }
/* Virtual functions the clients must provide to visit statements
and phi nodes respectively. */
virtual enum ssa_prop_result visit_stmt (gimple *, edge *, tree *) = 0;
virtual enum ssa_prop_result visit_phi (gphi *) = 0;
/* Main interface into the propagation engine. */
void ssa_propagate (void);
private:
/* Internal implementation details. */
void simulate_stmt (gimple *stmt);
void process_ssa_edge_worklist (void);
void simulate_block (basic_block);
};
class substitute_and_fold_engine
{
public:
virtual ~substitute_and_fold_engine (void) { }
virtual bool fold_stmt (gimple_stmt_iterator *) { return false; }
virtual tree get_value (tree) { return NULL_TREE; }
bool substitute_and_fold (void);
bool replace_uses_in (gimple *);
bool replace_phi_args_in (gphi *);
};
#endif /* _TREE_SSA_PROPAGATE_H */
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