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// 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_REPLACE_ID_WITH_SYNONYM_H_
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/fuzz/transformation.h"
#include "source/fuzz/transformation_context.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
class TransformationReplaceIdWithSynonym : public Transformation {
public:
explicit TransformationReplaceIdWithSynonym(
const protobufs::TransformationReplaceIdWithSynonym& message);
TransformationReplaceIdWithSynonym(
protobufs::IdUseDescriptor id_use_descriptor, uint32_t synonymous_id);
// - The fact manager must know that the id identified by
// |message_.id_use_descriptor| is synonomous with |message_.synonymous_id|.
// - Replacing the id in |message_.id_use_descriptor| by
// |message_.synonymous_id| must respect SPIR-V's rules about uses being
// dominated by their definitions.
// - The id use must be replaceable in principle. See
// fuzzerutil::IdUseCanBeReplaced for details.
// - |fresh_id_for_temporary| must be 0.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Replaces the use identified by |message_.id_use_descriptor| with the
// synonymous id identified by |message_.synonymous_id|.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Returns true if |type_id_1| and |type_id_2| represent compatible types
// given the context of the instruction with |opcode| (i.e. we can replace
// an operand of |opcode| of the first type with an id of the second type
// and vice-versa).
static bool TypesAreCompatible(opt::IRContext* ir_context, SpvOp opcode,
uint32_t use_in_operand_index,
uint32_t type_id_1, uint32_t type_id_2);
private:
// Returns true if the instruction with opcode |opcode| does not change its
// behaviour depending on the signedness of the operand at
// |use_in_operand_index|.
// Assumes that the operand must be the id of an integer scalar or vector.
static bool IsAgnosticToSignednessOfOperand(SpvOp opcode,
uint32_t use_in_operand_index);
protobufs::TransformationReplaceIdWithSynonym message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_
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