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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_REPLACE_BOOLEAN_CONSTANT_WITH_CONSTANT_BINARY_H_
#define SOURCE_FUZZ_TRANSFORMATION_REPLACE_BOOLEAN_CONSTANT_WITH_CONSTANT_BINARY_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 TransformationReplaceBooleanConstantWithConstantBinary
: public Transformation {
public:
explicit TransformationReplaceBooleanConstantWithConstantBinary(
protobufs::TransformationReplaceBooleanConstantWithConstantBinary
message);
TransformationReplaceBooleanConstantWithConstantBinary(
const protobufs::IdUseDescriptor& id_use_descriptor, uint32_t lhs_id,
uint32_t rhs_id, spv::Op comparison_opcode,
uint32_t fresh_id_for_binary_operation);
// - |message_.fresh_id_for_binary_operation| must not already be used by the
// module.
// - |message_.id_use_descriptor| must identify a use of a boolean constant c.
// - |message_.lhs_id| and |message.rhs_id| must be the ids of constant
// instructions with the same type
// - |message_.opcode| must be suitable for applying to |message.lhs_id| and
// |message_.rhs_id|, and the result must evaluate to the boolean constant
// c.
// - The boolean constant usage must not be an argument to OpPhi, because in
// this case it is not legal to insert a binary operator instruction right
// before the OpPhi.
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2902): consider
// replacing a boolean in an OpPhi by adding a binary operator instruction
// to the parent block for the OpPhi.
bool IsApplicable(
opt::IRContext* ir_context,
const TransformationContext& transformation_context) const override;
// A new instruction is added before the boolean constant usage that computes
// the result of applying |message_.opcode| to |message_.lhs_id| and
// |message_.rhs_id| is added, with result id
// |message_.fresh_id_for_binary_operation|. The boolean constant usage is
// replaced with this result id.
void Apply(opt::IRContext* ir_context,
TransformationContext* transformation_context) const override;
// The same as Apply, except that the newly-added binary instruction is
// returned.
opt::Instruction* ApplyWithResult(
opt::IRContext* ir_context,
TransformationContext* transformation_context) const;
std::unordered_set<uint32_t> GetFreshIds() const override;
protobufs::Transformation ToMessage() const override;
private:
protobufs::TransformationReplaceBooleanConstantWithConstantBinary message_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_BOOLEAN_CONSTANT_WITH_CONSTANT_BINARY_H_
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