Home | History | Annotate | Download | only in service 
      1 /* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
      2 
      3 Licensed under the Apache License, Version 2.0 (the "License");
      4 you may not use this file except in compliance with the License.
      5 You may obtain a copy of the License at
      6 
      7     http://www.apache.org/licenses/LICENSE-2.0
      8 
      9 Unless required by applicable law or agreed to in writing, software
     10 distributed under the License is distributed on an "AS IS" BASIS,
     11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 See the License for the specific language governing permissions and
     13 limitations under the License.
     14 ==============================================================================*/
     15 
     16 #include "tensorflow/compiler/xla/service/while_util.h"
     17 
     18 #include "tensorflow/compiler/xla/service/hlo_matchers.h"
     19 #include "tensorflow/compiler/xla/test.h"
     20 #include "tensorflow/compiler/xla/tools/parser/hlo_parser.h"
     21 
     22 namespace xla {
     23 namespace {
     24 
     25 namespace op = ::xla::testing::opcode_matchers;
     26 
     27 StatusOr<std::unique_ptr<HloModule>> GetParsedModule(
     28     HloComputation** entry_computation, HloInstruction** param0,
     29     HloInstruction** param1, HloInstruction** param2) {
     30   const char* const hlo_string = R"(
     31 HloModule ModuleWithWhile
     32 
     33 while_body {
     34   ROOT p_body = (f32[32,32]{1,0}, f32[32,32]{1,0}) parameter(0)
     35 }
     36 
     37 while_condition {
     38   p_cond = f32[32,32]{1,0} parameter(0)
     39   ROOT result = pred[] constant(true)
     40 }
     41 
     42 ENTRY entry {
     43   p_entry_0 = f32[32,32]{1,0} parameter(0)
     44   p_entry_1 = s32[32,32]{1,0} parameter(1)
     45   p_entry_2 = s64[32,32]{1,0} parameter(2)
     46   while_init = (f32[32,32]{1,0}, f32[32,32]{1,0}) tuple(p_entry_0, p_entry_0)
     47   ROOT while = (f32[32,32]{1,0}, f32[32,32]{1,0}) while(while_init), condition=while_condition, body=while_body
     48 }
     49 )";
     50 
     51   TF_ASSIGN_OR_RETURN(std::unique_ptr<HloModule> module,
     52                       tools::Parse(hlo_string));
     53 
     54   *entry_computation = module->entry_computation();
     55   *param0 = (*entry_computation)->parameter_instruction(0);
     56   *param1 = (*entry_computation)->parameter_instruction(1);
     57   *param2 = (*entry_computation)->parameter_instruction(2);
     58 
     59   return std::move(module);
     60 }
     61 
     62 TEST(WhileUtil, MakeZeroInstructionsLiveOp) {
     63   HloInstruction *param0, *param1, *param2;
     64   HloComputation* entry_computation;
     65 
     66   TF_ASSERT_OK_AND_ASSIGN(
     67       std::unique_ptr<HloModule> module,
     68       GetParsedModule(&entry_computation, &param0, &param1, &param2));
     69 
     70   HloInstruction* while_instr = entry_computation->root_instruction();
     71   ASSERT_EQ(while_instr->opcode(), HloOpcode::kWhile);
     72 
     73   TF_ASSERT_OK_AND_ASSIGN(
     74       WhileUtil::MakeInstructionsLiveInResult make_live_in_result,
     75       WhileUtil::MakeInstructionsLiveIn(while_instr, /*instructions=*/{}));
     76 
     77   HloInstruction* new_while_instr = make_live_in_result.new_while_instr;
     78 
     79   EXPECT_THAT(
     80       entry_computation->root_instruction(),
     81       op::Tuple(op::GetTupleElement(::testing::Eq(new_while_instr), 0),
     82                 op::GetTupleElement(::testing::Eq(new_while_instr), 1)));
     83 
     84   auto param_reconstructed =
     85       op::Tuple(op::GetTupleElement(op::Parameter(0), 0),
     86                 op::GetTupleElement(op::Parameter(0), 1));
     87 
     88   EXPECT_THAT(new_while_instr->while_body()->root_instruction(),
     89               op::Tuple(op::GetTupleElement(param_reconstructed, 0),
     90                         op::GetTupleElement(param_reconstructed, 1)));
     91 }
     92 
     93 TEST(WhileUtilTest, MakeTwoInstructionsLive) {
     94   HloInstruction *param0, *param1, *param2;
     95   HloComputation* entry_computation;
     96 
     97   TF_ASSERT_OK_AND_ASSIGN(
     98       std::unique_ptr<HloModule> module,
     99       GetParsedModule(&entry_computation, &param0, &param1, &param2));
    100 
    101   HloInstruction* while_instr = entry_computation->root_instruction();
    102   ASSERT_EQ(while_instr->opcode(), HloOpcode::kWhile);
    103 
    104   TF_ASSERT_OK_AND_ASSIGN(
    105       WhileUtil::MakeInstructionsLiveInResult make_live_in_result,
    106       WhileUtil::MakeInstructionsLiveIn(while_instr,
    107                                         /*instructions=*/{param0, param1}));
    108 
    109   HloInstruction* new_while_instr = make_live_in_result.new_while_instr;
    110 
    111   XLA_VLOG_LINES(3, module->ToString());
    112 
    113   EXPECT_THAT(
    114       entry_computation->root_instruction(),
    115       op::Tuple(op::GetTupleElement(::testing::Eq(new_while_instr), 0),
    116                 op::GetTupleElement(::testing::Eq(new_while_instr), 1)));
    117 
    118   auto first_half_param_reconstructed =
    119       op::Tuple(op::GetTupleElement(op::Parameter(0), 0),
    120                 op::GetTupleElement(op::Parameter(0), 1));
    121 
    122   EXPECT_THAT(new_while_instr->while_body()->root_instruction(),
    123               op::Tuple(op::GetTupleElement(first_half_param_reconstructed, 0),
    124                         op::GetTupleElement(first_half_param_reconstructed, 1),
    125                         op::GetTupleElement(op::Parameter(0), 2),
    126                         op::GetTupleElement(op::Parameter(0), 3)));
    127 }
    128 
    129 }  // namespace
    130 }  // namespace xla
    131