SPIRV-Tools/source/fuzz/transformation_copy_object.h

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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_COPY_OBJECT_H_
#define SOURCE_FUZZ_TRANSFORMATION_COPY_OBJECT_H_
#include "source/fuzz/fact_manager.h"
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
#include "source/fuzz/transformation.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace fuzz {
class TransformationCopyObject : public Transformation {
public:
explicit TransformationCopyObject(
const protobufs::TransformationCopyObject& message);
TransformationCopyObject(uint32_t object, uint32_t base_instruction_id,
uint32_t offset, uint32_t fresh_id);
// - |message_.fresh_id| must not be used by the module.
// - |message_.object| must be a result id that is a legitimate operand for
// OpCopyObject. In particular, it must be the id of an instruction that
// has a result type
// - |message_.object| must not be the target of any decoration.
// TODO(afd): consider copying decorations along with objects.
// - |message_.insert_after_id| must be the result id of an instruction
// 'base' in some block 'blk'.
// - 'blk' must contain an instruction 'inst' located |message_.offset|
// instructions after 'base' (if |message_.offset| = 0 then 'inst' =
// 'base').
// - It must be legal to insert an OpCopyObject instruction directly
// before 'inst'.
// - |message_object| must be available directly before 'inst'.
bool IsApplicable(opt::IRContext* context,
const FactManager& fact_manager) const override;
// - A new instruction,
// %|message_.fresh_id| = OpCopyObject %ty %|message_.object|
// is added directly before the instruction at |message_.insert_after_id| +
// |message_|.offset, where %ty is the type of |message_.object|.
// - The fact that |message_.fresh_id| and |message_.object| are synonyms
// is added to the fact manager.
void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
protobufs::Transformation ToMessage() const override;
// Determines whether it is OK to make a copy of |inst|.
static bool IsCopyable(opt::IRContext* ir_context, opt::Instruction* inst);
// Determines whether it is OK to insert a copy instruction before the given
// instruction.
static bool CanInsertCopyBefore(
const opt::BasicBlock::iterator& instruction_in_block);
private:
protobufs::TransformationCopyObject message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_COPY_OBJECT_H_