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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_SPLIT_BLOCK_H_
#define SOURCE_FUZZ_TRANSFORMATION_SPLIT_BLOCK_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 TransformationSplitBlock : public Transformation {
public:
explicit TransformationSplitBlock(
const protobufs::TransformationSplitBlock& message);
TransformationSplitBlock(
const protobufs::InstructionDescriptor& instruction_to_split_before,
uint32_t fresh_id);
// - |message_.base_instruction_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').
// - Splitting 'blk' at 'inst', so that all instructions from 'inst' onwards
// appear in a new block that 'blk' directly jumps to must be valid.
// - |message_.fresh_id| must not be used by the module.
bool IsApplicable(opt::IRContext* context,
const FactManager& fact_manager) const override;
// - A new block with label |message_.fresh_id| is inserted right after 'blk'
// in program order.
// - All instructions of 'blk' from 'inst' onwards are moved into the new
// block.
// - 'blk' is made to jump unconditionally to the new block.
// - If 'blk' was dead, the new block is also dead.
void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
protobufs::Transformation ToMessage() const override;
private:
protobufs::TransformationSplitBlock message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_SPLIT_BLOCK_H_