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Some transformations (e.g. TransformationAddFunction) rely on running the validator to decide whether the transformation is applicable. A recent change allowed spirv-fuzz to take validator options, to cater for the case where a module should be considered valid under particular conditions. However, validation during the checking of transformations had no access to these validator options. This change introduced TransformationContext, which currently consists of a fact manager and a set of validator options, but could in the future have other fields corresponding to other objects that it is useful to have access to when applying transformations. Now, instead of checking and applying transformations in the context of a FactManager, a TransformationContext is used. This gives access to the fact manager as before, and also access to the validator options when they are needed.
79 lines
3.1 KiB
C++
79 lines
3.1 KiB
C++
// Copyright (c) 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_FUZZ_TRANSFORMATION_EQUATION_INSTRUCTION_H_
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#define SOURCE_FUZZ_TRANSFORMATION_EQUATION_INSTRUCTION_H_
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#include <vector>
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/transformation.h"
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#include "source/fuzz/transformation_context.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationEquationInstruction : public Transformation {
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public:
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explicit TransformationEquationInstruction(
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const protobufs::TransformationEquationInstruction& message);
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TransformationEquationInstruction(
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uint32_t fresh_id, SpvOp opcode,
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const std::vector<uint32_t>& in_operand_id,
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const protobufs::InstructionDescriptor& instruction_to_insert_before);
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// - |message_.fresh_id| must be fresh.
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// - |message_.instruction_to_insert_before| must identify an instruction
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// before which an equation instruction can legitimately be inserted.
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// - Each id in |message_.in_operand_id| must exist, not be an OpUndef, and
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// be available before |message_.instruction_to_insert_before|.
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// - |message_.opcode| must be an opcode for which we know how to handle
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// equations, the types of the ids in |message_.in_operand_id| must be
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// suitable for use with this opcode, and the module must contain an
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// appropriate result type id.
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bool IsApplicable(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const override;
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// Adds an instruction to the module, right before
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// |message_.instruction_to_insert_before|, of the form:
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//
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// |message_.fresh_id| = |message_.opcode| %type |message_.in_operand_ids|
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//
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// where %type is a type id that already exists in the module and that is
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// compatible with the opcode and input operands.
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//
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// The fact manager is also updated to inform it of this equation fact.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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protobufs::Transformation ToMessage() const override;
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private:
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// A helper that, in one fell swoop, checks that |message_.opcode| and the ids
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// in |message_.in_operand_id| are compatible, and that the module contains
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// an appropriate result type id. If all is well, the result type id is
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// returned. Otherwise, 0 is returned.
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uint32_t MaybeGetResultType(opt::IRContext* ir_context) const;
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protobufs::TransformationEquationInstruction message_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_TRANSFORMATION_EQUATION_INSTRUCTION_H_
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