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// Copyright (c) 2020 Stefano Milizia
// 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_RECORD_SYNONYMOUS_CONSTANTS_H
#define SOURCE_FUZZ_TRANSFORMATION_RECORD_SYNONYMOUS_CONSTANTS_H
#include "source/fuzz/transformation.h"
namespace spvtools {
namespace fuzz {
class TransformationRecordSynonymousConstants : public Transformation {
public:
explicit TransformationRecordSynonymousConstants(
protobufs::TransformationRecordSynonymousConstants message);
TransformationRecordSynonymousConstants(uint32_t constant1_id,
uint32_t constant2_id);
// - |message_.constant_id| and |message_.synonym_id| are distinct ids
// of constants
// - |message_.constant_id| and |message_.synonym_id| refer to constants
// that are equivalent.
// Constants are equivalent if at least one of the following holds:
// - they are equal (i.e. they have the same type ids and equal values)
// - both of them represent zero-like values of compatible types
// - they are composite constants with compatible types and their
// components are pairwise equivalent
// Two types are compatible if at least one of the following holds:
// - they have the same id
// - they are integer scalar types with the same width
// - they are integer vectors and their components have the same width
// (this is always the case if the components are equivalent)
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// Adds the fact that |message_.constant_id| and |message_.synonym_id|
// are synonyms to the fact manager. The module is not changed.
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::TransformationRecordSynonymousConstants message_;
// Returns true if the two given constants are equivalent
// (the description of IsApplicable specifies the conditions they must satisfy
// to be considered equivalent)
static bool AreEquivalentConstants(opt::IRContext* ir_context,
uint32_t constant_id1,
uint32_t constant_id2);
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_RECORD_SYNONYMOUS_CONSTANTS