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