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https://github.com/KhronosGroup/SPIRV-Tools
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fcb22ecf0f
Adds a virtual method, GetFreshIds(), to Transformation. Every transformation uses this to indicate which ids in its protobuf message are fresh ids. This means that when replaying a sequence of transformations the replayer can obtain a smallest id that is not in use by the module already and that will not be used by any transformation by necessity. Ids greater than or equal to this id can be used as overflow ids. Fixes #3851.
79 lines
3.0 KiB
C++
79 lines
3.0 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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std::unordered_set<uint32_t> GetFreshIds() const override;
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protobufs::Transformation ToMessage() const override;
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private:
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// Returns type id for the equation instruction. Returns 0 if result type does
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// not exist.
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uint32_t MaybeGetResultTypeId(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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