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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(
const 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 equal or equivalent.
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3536): Signed and
// unsigned integers are currently considered non-equivalent
// Two integers with the same width and value are equal, even if one is
// signed and the other is not.
// Constants are equivalent:
// - if both of them represent zero-like values of the same type
// - if they are composite constants with the same type and their
// components are pairwise equivalent.
// - |constant1_id| and |constant2_id| may not be irrelevant.
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;
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
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