| // Copyright (c) 2019 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_BREAK_H_ |
| #define SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_BREAK_H_ |
| |
| #include <vector> |
| |
| #include "source/fuzz/fact_manager.h" |
| #include "source/fuzz/protobufs/spirvfuzz_protobufs.h" |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| namespace transformation { |
| |
| // - |message.from_block| must be the id of a block a in the given module. |
| // - |message.to_block| must be the id of a block b in the given module. |
| // - if |message.break_condition_value| holds (does not hold) then |
| // OpConstantTrue (OpConstantFalse) must be present in the module |
| // - |message.phi_ids| must be a list of ids that are all available at |
| // |message.from_block| |
| // - a and b must be in the same function. |
| // - b must be a merge block. |
| // - a must end with an unconditional branch to some block c. |
| // - replacing this branch with a conditional branch to b or c, with |
| // the boolean constant associated with |message.break_condition_value| as |
| // the condition, and the ids in |message.phi_ids| used to extend |
| // any OpPhi instructions at b as a result of the edge from a, must |
| // maintain validity of the module. |
| bool IsApplicable(const protobufs::TransformationAddDeadBreak& message, |
| opt::IRContext* context, const FactManager& fact_manager); |
| |
| // Replaces the terminator of a with a conditional branch to b or c. |
| // The boolean constant associated with |message.break_condition_value| is used |
| // as the condition, and the order of b and c is arranged such that control is |
| // guaranteed to jump to c. |
| void Apply(const protobufs::TransformationAddDeadBreak& message, |
| opt::IRContext* context, FactManager* fact_manager); |
| |
| // Helper factory to create a transformation message. |
| protobufs::TransformationAddDeadBreak MakeTransformationAddDeadBreak( |
| uint32_t from_block, uint32_t to_block, bool break_condition_value, |
| std::vector<uint32_t> phi_ids); |
| |
| } // namespace transformation |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_TRANSFORMATION_ADD_DEAD_BREAK_H_ |