86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#ifndef TENSORFLOW_COMPILER_XLA_SERVICE_HLO_PASS_FIX_H_
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#define TENSORFLOW_COMPILER_XLA_SERVICE_HLO_PASS_FIX_H_
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#include <algorithm>
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#include "tensorflow/compiler/xla/service/hlo_module.h"
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#include "tensorflow/compiler/xla/service/hlo_module_group.h"
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#include "tensorflow/compiler/xla/status_macros.h"
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#include "tensorflow/compiler/xla/statusor.h"
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#include "tensorflow/compiler/xla/types.h"
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#include "tensorflow/core/platform/macros.h"
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namespace xla {
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// Do an HLO pass to a fix point.
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template <typename Pass>
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class HloPassFix : public Pass {
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public:
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template <typename... Args>
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explicit HloPassFix(Args&&... args) : Pass(args...) {}
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StatusOr<bool> Run(HloModule* module) override {
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bool changed = false;
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bool changed_this_iteration = true;
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int64 iteration_count = 0;
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const int64 kLimit = 25;
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VLOG(3) << "Running HloPassFix on " << Pass::name();
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while (changed_this_iteration) {
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TF_ASSIGN_OR_RETURN(changed_this_iteration, Pass::Run(module));
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changed |= changed_this_iteration;
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VLOG(3) << Pass::name() << " iteration " << iteration_count
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<< " changed_this_iteration: " << changed_this_iteration;
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++iteration_count;
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if (iteration_count == kLimit) {
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VLOG(1) << "Unexpectedly high number of iterations in HLO passes '"
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<< Pass::name() << "' for module '" << module->name()
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<< "'. Exiting fixed point loop.";
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// Return false in case this is fixed point is nested.
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return false;
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}
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}
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return changed;
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}
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StatusOr<bool> RunOnModuleGroup(HloModuleGroup* module_group) override {
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bool changed = false;
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bool changed_this_iteration = true;
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int64 iteration_count = 0;
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const int64 kLimit = 25;
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VLOG(3) << "Running HloPassFix.";
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while (changed_this_iteration) {
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TF_ASSIGN_OR_RETURN(changed_this_iteration,
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Pass::RunOnModuleGroup(module_group));
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changed |= changed_this_iteration;
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VLOG(3) << "changed_this_iteration: " << changed_this_iteration;
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++iteration_count;
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if (iteration_count == kLimit) {
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VLOG(1) << "Unexpectedly high number of iterations in HLO passes, "
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"exiting fixed point loop.";
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// Return false in case this is fixed point is nested.
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return false;
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}
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}
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return changed;
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}
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};
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} // namespace xla
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#endif // TENSORFLOW_COMPILER_XLA_SERVICE_HLO_PASS_FIX_H_
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