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https://github.com/KhronosGroup/SPIRV-Tools
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96 lines
4.1 KiB
C++
96 lines
4.1 KiB
C++
// Copyright (c) 2019 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_VECTOR_SHUFFLE_H_
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#define SOURCE_FUZZ_TRANSFORMATION_VECTOR_SHUFFLE_H_
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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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#include "source/opt/types.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationVectorShuffle : public Transformation {
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public:
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explicit TransformationVectorShuffle(
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const protobufs::TransformationVectorShuffle& message);
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TransformationVectorShuffle(
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const protobufs::InstructionDescriptor& instruction_to_insert_before,
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uint32_t fresh_id, uint32_t vector1, uint32_t vector2,
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const std::vector<uint32_t>& component);
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// - |message_.fresh_id| must not be in use
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// - |message_.instruction_to_insert_before| must identify an instruction
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// before which it is legitimate to insert an OpVectorShuffle
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// - |message_.vector1| and |message_.vector2| must be instructions of vector
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// type, and the element types of these vectors must be the same
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// - Each element of |message_.component| must either be 0xFFFFFFFF
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// (representing an undefined component), or must be less than the combined
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// sizes of the input vectors
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// - The module must already contain a vector type with the same element type
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// as |message_.vector1| and |message_.vector2|, and with the size of
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// |message_component| as its element count
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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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// Inserts an OpVectorShuffle instruction before
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// |message_.instruction_to_insert_before|, shuffles vectors
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// |message_.vector1| and |message_.vector2| using the indices provided by
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// |message_.component|, into |message_.fresh_id|.
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//
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// If |message_.fresh_id| is irrelevant (e.g. due to being in a dead block)
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// of if one of |message_.vector1| or |message_.vector2| is irrelevant and the
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// shuffle reads components from the irrelevant vector then no synonym facts
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// are added.
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//
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// Otherwise, a fact is added recording that element of |message_.fresh_id| is
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// synonymous with the element of |message_.vector1| or |message_.vector2|
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// from which it came (with undefined components being ignored).
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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 a type id that already exists in |ir_context| suitable for
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// representing the result of the shuffle, where |element_type| is known to
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// be the common element type of the vectors to which the shuffle is being
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// applied. Returns 0 if no such id exists.
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uint32_t GetResultTypeId(opt::IRContext* ir_context,
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const opt::analysis::Type& element_type) const;
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// Returns the type associated with |id_of_vector| in |ir_context|.
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static opt::analysis::Vector* GetVectorType(opt::IRContext* ir_context,
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uint32_t id_of_vector);
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// Helper method for adding data synonym facts when applying the
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// transformation to |ir_context| and |transformation_context|.
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void AddDataSynonymFacts(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const;
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protobufs::TransformationVectorShuffle 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_VECTOR_SHUFFLE_H_
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