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// Copyright (c) 2020 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_REPLACE_OPSELECT_WITH_CONDITIONAL_BRANCH_H
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_OPSELECT_WITH_CONDITIONAL_BRANCH_H
#include "source/fuzz/transformation.h"
namespace spvtools {
namespace fuzz {
class TransformationReplaceOpSelectWithConditionalBranch
: public Transformation {
public:
explicit TransformationReplaceOpSelectWithConditionalBranch(
protobufs::TransformationReplaceOpSelectWithConditionalBranch message);
TransformationReplaceOpSelectWithConditionalBranch(uint32_t select_id,
uint32_t true_block_id,
uint32_t false_block_id);
// - |message_.select_id| is the result id of an OpSelect instruction.
// - The condition of the OpSelect must be a scalar boolean.
// - The OpSelect instruction is the first instruction in its block.
// - The block containing the instruction is not a merge block, and it has a
// single predecessor, which is not a header and whose last instruction is
// OpBranch.
// - Each of |message_.true_block_id| and |message_.false_block_id| is either
// 0 or a valid fresh id, and at most one of them is 0. They must be
// distinct.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Replaces the OpSelect instruction with id |message_.select_id| with a
// conditional branch and an OpPhi instruction.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
private:
protobufs::TransformationReplaceOpSelectWithConditionalBranch message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_OPSELECT_WITH_CONDITIONAL_BRANCH_H
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