isl_test_python.py

   1 # Copyright 2016-2017 Tobias Grosser
   2 #
   3 # Use of this software is governed by the MIT license
   4 #
   5 # Written by Tobias Grosser, Weststrasse 47, CH-8003, Zurich
   6
   7 import sys
   8 import isl
   9
  10 # Test that isl objects can be constructed.
  11 #
  12 # This tests:
  13 #  - construction from a string
  14 #  - construction from an integer
  15 #  - static constructor without a parameter
  16 #  - conversion construction
  17 #  - construction of empty union set
  18 #
  19 #  The tests to construct from integers and strings cover functionality that
  20 #  is also tested in the parameter type tests, but here the presence of
  21 #  multiple overloaded constructors and overload resolution is tested.
  22 #
  23 def test_constructors():
  24         zero1 = isl.val("0")
  25         assert(zero1.is_zero())
  26
  27         zero2 = isl.val(0)
  28         assert(zero2.is_zero())
  29
  30         zero3 = isl.val.zero()
  31         assert(zero3.is_zero())
  32
  33         bs = isl.basic_set("{ [1] }")
  34         result = isl.set("{ [1] }")
  35         s = isl.set(bs)
  36         assert(s.is_equal(result))
  37
  38         us = isl.union_set("{ A[1]; B[2, 3] }")
  39         empty = isl.union_set.empty()
  40         assert(us.is_equal(us.union(empty)))
  41
  42 # Test integer function parameters for a particular integer value.
  43 #
  44 def test_int(i):
  45         val_int = isl.val(i)
  46         val_str = isl.val(str(i))
  47         assert(val_int.eq(val_str))
  48
  49 # Test integer function parameters.
  50 #
  51 # Verify that extreme values and zero work.
  52 #
  53 def test_parameters_int():
  54         test_int(sys.maxsize)
  55         test_int(-sys.maxsize - 1)
  56         test_int(0)
  57
  58 # Test isl objects parameters.
  59 #
  60 # Verify that isl objects can be passed as lvalue and rvalue parameters.
  61 # Also verify that isl object parameters are automatically type converted if
  62 # there is an inheritance relation. Finally, test function calls without
  63 # any additional parameters, apart from the isl object on which
  64 # the method is called.
  65 #
  66 def test_parameters_obj():
  67         a = isl.set("{ [0] }")
  68         b = isl.set("{ [1] }")
  69         c = isl.set("{ [2] }")
  70         expected = isl.set("{ [i] : 0 <= i <= 2 }")
  71
  72         tmp = a.union(b)
  73         res_lvalue_param = tmp.union(c)
  74         assert(res_lvalue_param.is_equal(expected))
  75
  76         res_rvalue_param = a.union(b).union(c)
  77         assert(res_rvalue_param.is_equal(expected))
  78
  79         a2 = isl.basic_set("{ [0] }")
  80         assert(a.is_equal(a2))
  81
  82         two = isl.val(2)
  83         half = isl.val("1/2")
  84         res_only_this_param = two.inv()
  85         assert(res_only_this_param.eq(half))
  86
  87 # Test different kinds of parameters to be passed to functions.
  88 #
  89 # This includes integer and isl object parameters.
  90 #
  91 def test_parameters():
  92         test_parameters_int()
  93         test_parameters_obj()
  94
  95 # Test that isl objects are returned correctly.
  96 #
  97 # This only tests that after combining two objects, the result is successfully
  98 # returned.
  99 #
 100 def test_return_obj():
 101         one = isl.val("1")
 102         two = isl.val("2")
 103         three = isl.val("3")
 104
 105         res = one.add(two)
 106
 107         assert(res.eq(three))
 108
 109 # Test that integer values are returned correctly.
 110 #
 111 def test_return_int():
 112         one = isl.val("1")
 113         neg_one = isl.val("-1")
 114         zero = isl.val("0")
 115
 116         assert(one.sgn() > 0)
 117         assert(neg_one.sgn() < 0)
 118         assert(zero.sgn() == 0)
 119
 120 # Test that isl_bool values are returned correctly.
 121 #
 122 # In particular, check the conversion to bool in case of true and false.
 123 #
 124 def test_return_bool():
 125         empty = isl.set("{ : false }")
 126         univ = isl.set("{ : }")
 127
 128         b_true = empty.is_empty()
 129         b_false = univ.is_empty()
 130
 131         assert(b_true)
 132         assert(not b_false)
 133
 134 # Test that strings are returned correctly.
 135 # Do so by calling overloaded isl.ast_build.from_expr methods.
 136 #
 137 def test_return_string():
 138         context = isl.set("[n] -> { : }")
 139         build = isl.ast_build.from_context(context)
 140         pw_aff = isl.pw_aff("[n] -> { [n] }")
 141         set = isl.set("[n] -> { : n >= 0 }")
 142
 143         expr = build.expr_from(pw_aff)
 144         expected_string = "n"
 145         assert(expected_string == expr.to_C_str())
 146
 147         expr = build.expr_from(set)
 148         expected_string = "n >= 0"
 149         assert(expected_string == expr.to_C_str())
 150
 151 # Test that return values are handled correctly.
 152 #
 153 # Test that isl objects, integers, boolean values, and strings are
 154 # returned correctly.
 155 #
 156 def test_return():
 157         test_return_obj()
 158         test_return_int()
 159         test_return_bool()
 160         test_return_string()
 161
 162 # Test that foreach functions are modeled correctly.
 163 #
 164 # Verify that closures are correctly called as callback of a 'foreach'
 165 # function and that variables captured by the closure work correctly. Also
 166 # check that the foreach function handles exceptions thrown from
 167 # the closure and that it propagates the exception.
 168 #
 169 def test_foreach():
 170         s = isl.set("{ [0]; [1]; [2] }")
 171
 172         list = []
 173         def add(bs):
 174                 list.append(bs)
 175         s.foreach_basic_set(add)
 176
 177         assert(len(list) == 3)
 178         assert(list[0].is_subset(s))
 179         assert(list[1].is_subset(s))
 180         assert(list[2].is_subset(s))
 181         assert(not list[0].is_equal(list[1]))
 182         assert(not list[0].is_equal(list[2]))
 183         assert(not list[1].is_equal(list[2]))
 184
 185         def fail(bs):
 186                 raise Exception("fail")
 187
 188         caught = False
 189         try:
 190                 s.foreach_basic_set(fail)
 191         except:
 192                 caught = True
 193         assert(caught)
 194
 195 # Test the functionality of "every" functions.
 196 #
 197 # In particular, test the generic functionality and
 198 # test that exceptions are properly propagated.
 199 #
 200 def test_every():
 201         us = isl.union_set("{ A[i]; B[j] }")
 202
 203         def is_empty(s):
 204                 return s.is_empty()
 205         assert(not us.every_set(is_empty))
 206
 207         def is_non_empty(s):
 208                 return not s.is_empty()
 209         assert(us.every_set(is_non_empty))
 210
 211         def in_A(s):
 212                 return s.is_subset(isl.set("{ A[x] }"))
 213         assert(not us.every_set(in_A))
 214
 215         def not_in_A(s):
 216                 return not s.is_subset(isl.set("{ A[x] }"))
 217         assert(not us.every_set(not_in_A))
 218
 219         def fail(s):
 220                 raise Exception("fail")
 221
 222         caught = False
 223         try:
 224                 us.ever_set(fail)
 225         except:
 226                 caught = True
 227         assert(caught)
 228
 229 # Check basic construction of spaces.
 230 #
 231 def test_space():
 232         unit = isl.space.unit()
 233         set_space = unit.add_named_tuple("A", 3)
 234         map_space = set_space.add_named_tuple("B", 2)
 235
 236         set = isl.set.universe(set_space)
 237         map = isl.map.universe(map_space)
 238         assert(set.is_equal(isl.set("{ A[*,*,*] }")))
 239         assert(map.is_equal(isl.map("{ A[*,*,*] -> B[*,*] }")))
 240
 241 # Construct a simple schedule tree with an outer sequence node and
 242 # a single-dimensional band node in each branch, with one of them
 243 # marked coincident.
 244 #
 245 def construct_schedule_tree():
 246         A = isl.union_set("{ A[i] : 0 <= i < 10 }")
 247         B = isl.union_set("{ B[i] : 0 <= i < 20 }")
 248
 249         node = isl.schedule_node.from_domain(A.union(B))
 250         node = node.child(0)
 251
 252         filters = isl.union_set_list(A).add(B)
 253         node = node.insert_sequence(filters)
 254
 255         f_A = isl.multi_union_pw_aff("[ { A[i] -> [i] } ]")
 256         node = node.child(0)
 257         node = node.child(0)
 258         node = node.insert_partial_schedule(f_A)
 259         node = node.member_set_coincident(0, True)
 260         node = node.ancestor(2)
 261
 262         f_B = isl.multi_union_pw_aff("[ { B[i] -> [i] } ]")
 263         node = node.child(1)
 264         node = node.child(0)
 265         node = node.insert_partial_schedule(f_B)
 266         node = node.ancestor(2)
 267
 268         return node.schedule()
 269
 270 # Test basic schedule tree functionality.
 271 #
 272 # In particular, create a simple schedule tree and
 273 # - check that the root node is a domain node
 274 # - test map_descendant_bottom_up
 275 # - test foreach_descendant_top_down
 276 # - test every_descendant
 277 #
 278 def test_schedule_tree():
 279         schedule = construct_schedule_tree()
 280         root = schedule.root()
 281
 282         assert(type(root) == isl.schedule_node_domain)
 283
 284         count = [0]
 285         def inc_count(node):
 286                 count[0] += 1
 287                 return node
 288         root = root.map_descendant_bottom_up(inc_count)
 289         assert(count[0] == 8)
 290
 291         def fail_map(node):
 292                 raise Exception("fail")
 293                 return node
 294         caught = False
 295         try:
 296                 root.map_descendant_bottom_up(fail_map)
 297         except:
 298                 caught = True
 299         assert(caught)
 300
 301         count = [0]
 302         def inc_count(node):
 303                 count[0] += 1
 304                 return True
 305         root.foreach_descendant_top_down(inc_count)
 306         assert(count[0] == 8)
 307
 308         count = [0]
 309         def inc_count(node):
 310                 count[0] += 1
 311                 return False
 312         root.foreach_descendant_top_down(inc_count)
 313         assert(count[0] == 1)
 314
 315         def is_not_domain(node):
 316                 return type(node) != isl.schedule_node_domain
 317         assert(root.child(0).every_descendant(is_not_domain))
 318         assert(not root.every_descendant(is_not_domain))
 319
 320         def fail(node):
 321                 raise Exception("fail")
 322         caught = False
 323         try:
 324                 root.every_descendant(fail)
 325         except:
 326                 caught = True
 327         assert(caught)
 328
 329         domain = root.domain()
 330         filters = [isl.union_set("{}")]
 331         def collect_filters(node):
 332                 if type(node) == isl.schedule_node_filter:
 333                         filters[0] = filters[0].union(node.filter())
 334                 return True
 335         root.every_descendant(collect_filters)
 336         assert(domain.is_equal(filters[0]))
 337
 338 # Test marking band members for unrolling.
 339 # "schedule" is the schedule created by construct_schedule_tree.
 340 # It schedules two statements, with 10 and 20 instances, respectively.
 341 # Unrolling all band members therefore results in 30 at-domain calls
 342 # by the AST generator.
 343 #
 344 def test_ast_build_unroll(schedule):
 345         root = schedule.root()
 346         def mark_unroll(node):
 347                 if type(node) == isl.schedule_node_band:
 348                         node = node.member_set_ast_loop_unroll(0)
 349                 return node
 350         root = root.map_descendant_bottom_up(mark_unroll)
 351         schedule = root.schedule()
 352
 353         count_ast = [0]
 354         def inc_count_ast(node, build):
 355                 count_ast[0] += 1
 356                 return node
 357
 358         build = isl.ast_build()
 359         build = build.set_at_each_domain(inc_count_ast)
 360         ast = build.node_from(schedule)
 361         assert(count_ast[0] == 30)
 362
 363 # Test basic AST generation from a schedule tree.
 364 #
 365 # In particular, create a simple schedule tree and
 366 # - generate an AST from the schedule tree
 367 # - test at_each_domain
 368 # - test unrolling
 369 #
 370 def test_ast_build():
 371         schedule = construct_schedule_tree()
 372
 373         count_ast = [0]
 374         def inc_count_ast(node, build):
 375                 count_ast[0] += 1
 376                 return node
 377
 378         build = isl.ast_build()
 379         build_copy = build.set_at_each_domain(inc_count_ast)
 380         ast = build.node_from(schedule)
 381         assert(count_ast[0] == 0)
 382         count_ast[0] = 0
 383         ast = build_copy.node_from(schedule)
 384         assert(count_ast[0] == 2)
 385         build = build_copy
 386         count_ast[0] = 0
 387         ast = build.node_from(schedule)
 388         assert(count_ast[0] == 2)
 389
 390         do_fail = True
 391         count_ast_fail = [0]
 392         def fail_inc_count_ast(node, build):
 393                 count_ast_fail[0] += 1
 394                 if do_fail:
 395                         raise Exception("fail")
 396                 return node
 397         build = isl.ast_build()
 398         build = build.set_at_each_domain(fail_inc_count_ast)
 399         caught = False
 400         try:
 401                 ast = build.node_from(schedule)
 402         except:
 403                 caught = True
 404         assert(caught)
 405         assert(count_ast_fail[0] > 0)
 406         build_copy = build
 407         build_copy = build_copy.set_at_each_domain(inc_count_ast)
 408         count_ast[0] = 0
 409         ast = build_copy.node_from(schedule)
 410         assert(count_ast[0] == 2)
 411         count_ast_fail[0] = 0
 412         do_fail = False
 413         ast = build.node_from(schedule)
 414         assert(count_ast_fail[0] == 2)
 415
 416         test_ast_build_unroll(schedule)
 417
 418 # Test basic AST expression generation from an affine expression.
 419 #
 420 def test_ast_build_expr():
 421         pa = isl.pw_aff("[n] -> { [n + 1] }")
 422         build = isl.ast_build.from_context(pa.domain())
 423
 424         op = build.expr_from(pa)
 425         assert(type(op) == isl.ast_expr_op_add)
 426         assert(op.n_arg() == 2)
 427
 428 # Test the isl Python interface
 429 #
 430 # This includes:
 431 #  - Object construction
 432 #  - Different parameter types
 433 #  - Different return types
 434 #  - Foreach functions
 435 #  - Every functions
 436 #  - Spaces
 437 #  - Schedule trees
 438 #  - AST generation
 439 #  - AST expression generation
 440 #
 441 test_constructors()
 442 test_parameters()
 443 test_return()
 444 test_foreach()
 445 test_every()
 446 test_space()
 447 test_schedule_tree()
 448 test_ast_build()
 449 test_ast_build_expr()