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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_ADD_SUB_MUL_WITH_CARRYING_EXTENDED_H_
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_ADD_SUB_MUL_WITH_CARRYING_EXTENDED_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 TransformationReplaceAddSubMulWithCarryingExtended
: public Transformation {
public:
explicit TransformationReplaceAddSubMulWithCarryingExtended(
protobufs::TransformationReplaceAddSubMulWithCarryingExtended message);
explicit TransformationReplaceAddSubMulWithCarryingExtended(
uint32_t struct_fresh_id, uint32_t result_id);
// - |message_.struct_fresh_id| must be fresh.
// - |message_.result_id| must refer to an OpIAdd or OpISub or OpIMul
// instruction. In this instruction the result type id and the type ids of
// the operands must be the same.
// - The type of struct holding the intermediate result must exists in the
// module.
// - For OpIAdd, OpISub both operands must be unsigned.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// A transformation that replaces instructions OpIAdd, OpISub, OpIMul with
// pairs of instructions. The first one (OpIAddCarry, OpISubBorrow,
// OpUMulExtended, OpSMulExtended) computes the result into a struct. The
// second one extracts the appropriate component from the struct to yield the
// original result.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
// Checks if an OpIAdd, OpISub or OpIMul instruction can be used by the
// transformation.
bool static IsInstructionSuitable(opt::IRContext* ir_context,
const opt::Instruction& instruction);
private:
protobufs::TransformationReplaceAddSubMulWithCarryingExtended message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_ADD_SUB_MUL_WITH_CARRYING_EXTENDED_H_
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