cprover
polynomial_accelerator.h
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1 /*******************************************************************\
2 
3 Module: Loop Acceleration
4 
5 Author: Matt Lewis
6 
7 \*******************************************************************/
8 
11 
12 #ifndef CPROVER_GOTO_INSTRUMENT_ACCELERATE_POLYNOMIAL_ACCELERATOR_H
13 #define CPROVER_GOTO_INSTRUMENT_ACCELERATE_POLYNOMIAL_ACCELERATOR_H
14 
15 #include <map>
16 #include <set>
17 
18 #include <util/symbol_table.h>
19 
22 
23 #include "scratch_program.h"
24 #include "polynomial.h"
25 #include "path.h"
26 #include "accelerator.h"
27 #include "acceleration_utils.h"
28 #include "cone_of_influence.h"
29 #include "overflow_instrumenter.h"
30 
32 {
33 public:
36  const symbol_tablet &_symbol_table,
37  const goto_functionst &_goto_functions)
39  symbol_table(const_cast<symbol_tablet &>(_symbol_table)),
41  goto_functions(_goto_functions),
43  {
45  }
46 
49  const symbol_tablet &_symbol_table,
50  const goto_functionst &_goto_functions,
51  exprt &_loop_counter)
53  symbol_table(const_cast<symbol_tablet &>(_symbol_table)),
55  goto_functions(_goto_functions),
57  loop_counter(_loop_counter)
58  {
59  }
60 
61  bool accelerate(patht &loop, path_acceleratort &accelerator);
62 
63  bool fit_polynomial(
65  exprt &target,
66  polynomialt &polynomial);
67 
68 protected:
70 
72  goto_programt::instructionst &sliced_body,
73  exprt &target,
74  expr_sett &influence,
75  polynomialt &polynomial);
76 
77  void assert_for_values(
78  scratch_programt &program,
79  std::map<exprt, int> &values,
80  std::set<std::pair<expr_listt, exprt>> &coefficients,
81  int num_unwindings,
83  exprt &target,
84  overflow_instrumentert &overflow);
85  void extract_polynomial(
86  scratch_programt &program,
87  std::set<std::pair<expr_listt, exprt>> &coefficients,
88  polynomialt &polynomial);
89  void cone_of_influence(
91  exprt &target,
93  expr_sett &influence);
94 
95  bool fit_const(
97  exprt &target,
98  polynomialt &polynomial);
99 
100  bool check_inductive(
101  std::map<exprt, polynomialt> polynomials,
103  void stash_variables(
104  scratch_programt &program,
105  expr_sett modified,
106  substitutiont &substitution);
107  void stash_polynomials(
108  scratch_programt &program,
109  std::map<exprt, polynomialt> &polynomials,
110  std::map<exprt, exprt> &stashed,
112 
113  exprt precondition(patht &path);
114 
115  bool do_assumptions(
116  std::map<exprt, polynomialt> polynomials,
117  patht &body,
118  exprt &guard);
119 
120  typedef std::pair<exprt, exprt> expr_pairt;
121  typedef std::vector<expr_pairt> expr_pairst;
122 
124  {
129 
130  typedef std::vector<polynomial_array_assignmentt>
132 
133  bool do_arrays(
134  goto_programt::instructionst &loop_body,
135  std::map<exprt, polynomialt> &polynomials,
136  substitutiont &substitution,
137  scratch_programt &program);
139  goto_programt::instructionst &loop_body,
140  expr_sett &arrays_written);
142  expr_pairst &array_assignments,
143  std::map<exprt, polynomialt> &polynomials,
144  polynomial_array_assignmentst &array_polynomials,
145  polynomialst &nondet_indices);
146  bool expr2poly(
147  exprt &expr,
148  std::map<exprt, polynomialt> &polynomials,
149  polynomialt &poly);
150 
151  void ensure_no_overflows(goto_programt &program);
152 
154  const namespacet ns;
157 
159 
161 };
162 
164 
165 #endif // CPROVER_GOTO_INSTRUMENT_ACCELERATE_POLYNOMIAL_ACCELERATOR_H
path.h
overflow_instrumenter.h
symbol_tablet
The symbol table.
Definition: symbol_table.h:19
polynomial_acceleratort::extract_polynomial
void extract_polynomial(scratch_programt &program, std::set< std::pair< expr_listt, exprt >> &coefficients, polynomialt &polynomial)
polynomialt
Definition: polynomial.h:41
acceleration_utilst
Definition: acceleration_utils.h:36
polynomial_acceleratort::message_handler
message_handlert & message_handler
Definition: polynomial_accelerator.h:69
polynomial_acceleratort::fit_polynomial
bool fit_polynomial(goto_programt::instructionst &loop_body, exprt &target, polynomialt &polynomial)
Definition: polynomial_accelerator.cpp:435
polynomial_acceleratort::cone_of_influence
void cone_of_influence(goto_programt::instructionst &orig_body, exprt &target, goto_programt::instructionst &body, expr_sett &influence)
Definition: polynomial_accelerator.cpp:615
polynomial_acceleratort::fit_polynomial_sliced
bool fit_polynomial_sliced(goto_programt::instructionst &sliced_body, exprt &target, expr_sett &influence, polynomialt &polynomial)
Definition: polynomial_accelerator.cpp:277
polynomial_acceleratort::do_arrays
bool do_arrays(goto_programt::instructionst &loop_body, std::map< exprt, polynomialt > &polynomials, substitutiont &substitution, scratch_programt &program)
polynomial_acceleratort::expr_pairst
std::vector< expr_pairt > expr_pairst
Definition: polynomial_accelerator.h:121
polynomial_acceleratort::fit_const
bool fit_const(goto_programt::instructionst &loop_body, exprt &target, polynomialt &polynomial)
Definition: polynomial_accelerator.cpp:448
goto_programt::instructionst
std::list< instructiont > instructionst
Definition: goto_program.h:412
polynomial.h
acceleration_utils.h
polynomial_acceleratort::stash_polynomials
void stash_polynomials(scratch_programt &program, std::map< exprt, polynomialt > &polynomials, std::map< exprt, exprt > &stashed, goto_programt::instructionst &body)
Definition: polynomial_accelerator.cpp:734
exprt
Base class for all expressions.
Definition: expr.h:54
polynomial_acceleratort::do_assumptions
bool do_assumptions(std::map< exprt, polynomialt > polynomials, patht &body, exprt &guard)
polynomial_acceleratort::symbol_table
symbol_tablet & symbol_table
Definition: polynomial_accelerator.h:153
scratch_program.h
polynomial_acceleratort::array_assignments2polys
bool array_assignments2polys(expr_pairst &array_assignments, std::map< exprt, polynomialt > &polynomials, polynomial_array_assignmentst &array_polynomials, polynomialst &nondet_indices)
polynomial_acceleratort::gather_array_assignments
expr_pairst gather_array_assignments(goto_programt::instructionst &loop_body, expr_sett &arrays_written)
polynomial_acceleratort::accelerate
bool accelerate(patht &loop, path_acceleratort &accelerator)
Definition: polynomial_accelerator.cpp:45
polynomial_acceleratort::precondition
exprt precondition(patht &path)
Definition: polynomial_accelerator.cpp:788
polynomial_acceleratort::ns
const namespacet ns
Definition: polynomial_accelerator.h:154
polynomial_acceleratort::ensure_no_overflows
void ensure_no_overflows(goto_programt &program)
namespacet
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
Definition: namespace.h:93
polynomial_acceleratort::stash_variables
void stash_variables(scratch_programt &program, expr_sett modified, substitutiont &substitution)
Definition: polynomial_accelerator.cpp:752
scratch_programt
Definition: scratch_program.h:36
polynomial_acceleratort::polynomial_acceleratort
polynomial_acceleratort(message_handlert &message_handler, const symbol_tablet &_symbol_table, const goto_functionst &_goto_functions)
Definition: polynomial_accelerator.h:34
nil_exprt
The NIL expression.
Definition: std_expr.h:4461
polynomial_acceleratort::check_inductive
bool check_inductive(std::map< exprt, polynomialt > polynomials, goto_programt::instructionst &body)
Definition: polynomial_accelerator.cpp:656
polynomial_acceleratort::polynomial_array_assignment::index
polynomialt index
Definition: polynomial_accelerator.h:126
polynomial_acceleratort::polynomial_array_assignment::value
polynomialt value
Definition: polynomial_accelerator.h:127
path_acceleratort
Definition: accelerator.h:26
expr_sett
std::unordered_set< exprt, irep_hash > expr_sett
Definition: cone_of_influence.h:21
polynomial_acceleratort::goto_functions
const goto_functionst & goto_functions
Definition: polynomial_accelerator.h:155
message_handlert
Definition: message.h:24
overflow_instrumentert
Definition: overflow_instrumenter.h:25
goto_program.h
substitutiont
std::map< exprt, exprt > substitutiont
Definition: polynomial.h:39
polynomial_acceleratort::polynomial_array_assignment::array
exprt array
Definition: polynomial_accelerator.h:125
goto_functionst
A collection of goto functions.
Definition: goto_functions.h:22
patht
std::list< path_nodet > patht
Definition: path.h:45
accelerator.h
cone_of_influence.h
polynomialst
std::vector< polynomialt > polynomialst
Definition: polynomial.h:63
polynomial_acceleratort
Definition: polynomial_accelerator.h:31
polynomial_acceleratort::polynomial_array_assignment
Definition: polynomial_accelerator.h:123
goto_functions.h
polynomial_acceleratort::expr_pairt
std::pair< exprt, exprt > expr_pairt
Definition: polynomial_accelerator.h:120
goto_programt
A generic container class for the GOTO intermediate representation of one function.
Definition: goto_program.h:72
polynomial_acceleratort::polynomial_array_assignmentst
std::vector< polynomial_array_assignmentt > polynomial_array_assignmentst
Definition: polynomial_accelerator.h:131
polynomial_acceleratort::loop_counter
exprt loop_counter
Definition: polynomial_accelerator.h:158
polynomial_acceleratort::assert_for_values
void assert_for_values(scratch_programt &program, std::map< exprt, int > &values, std::set< std::pair< expr_listt, exprt >> &coefficients, int num_unwindings, goto_programt::instructionst &loop_body, exprt &target, overflow_instrumentert &overflow)
Definition: polynomial_accelerator.cpp:501
find_modified
expr_sett find_modified(goto_programt::instructionst &body)
polynomial_acceleratort::nonrecursive
expr_sett nonrecursive
Definition: polynomial_accelerator.h:160
symbol_table.h
Author: Diffblue Ltd.
polynomial_acceleratort::polynomial_array_assignmentt
struct polynomial_acceleratort::polynomial_array_assignment polynomial_array_assignmentt
polynomial_acceleratort::expr2poly
bool expr2poly(exprt &expr, std::map< exprt, polynomialt > &polynomials, polynomialt &poly)
polynomial_acceleratort::polynomial_acceleratort
polynomial_acceleratort(message_handlert &message_handler, const symbol_tablet &_symbol_table, const goto_functionst &_goto_functions, exprt &_loop_counter)
Definition: polynomial_accelerator.h:47
polynomial_acceleratort::utils
acceleration_utilst utils
Definition: polynomial_accelerator.h:156