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https://github.com/KhronosGroup/SPIRV-Tools
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08291a3a9e
A transformation that adds new OpPhi instructions to blocks with >=1 predecessors, so that its value depends on previously-defined ids of the right type, which are all synonymous. This instruction is also recorded as synonymous to the others. The related fuzzer pass still needs to be implemented. Fixes #3592 .
73 lines
3.2 KiB
C++
73 lines
3.2 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_ADD_OPPHI_SYNONYM_H_
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#define SOURCE_FUZZ_TRANSFORMATION_ADD_OPPHI_SYNONYM_H_
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#include "source/fuzz/transformation.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationAddOpPhiSynonym : public Transformation {
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public:
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explicit TransformationAddOpPhiSynonym(
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const protobufs::TransformationAddOpPhiSynonym& message);
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TransformationAddOpPhiSynonym(
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uint32_t block_id, const std::map<uint32_t, uint32_t>& preds_to_ids,
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uint32_t fresh_id);
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// - |message_.block_id| is the label of a block with at least one
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// predecessor.
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// - |message_.pred_to_id| contains a mapping from each of the predecessors of
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// the block to an id that is available at the end of the predecessor.
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// - All the ids corresponding to a predecessor in |message_.pred_to_id|:
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// - have been recorded as synonymous and all have the same type.
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// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3726): if a
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// predecessor is a dead block, any id of the right type could be used,
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// even if it is not synonym with the others.
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// - have one of the following types: Bool, Integer, Float, Vector, Matrix,
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// Array, Struct. Pointer types are also allowed if the VariablePointers
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// capability is enabled and the storage class is Workgroup or
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// StorageBuffer.
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// - |message_.fresh_id| is a fresh 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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// Given a block with n predecessors, with n >= 1, and n corresponding
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// synonymous ids of the same type, each available to use at the end of the
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// corresponding predecessor, adds an OpPhi instruction at the beginning of
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// the block of the form:
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// %fresh_id = OpPhi %type %id_1 %pred_1 %id_2 %pred_2 ... %id_n %pred_n
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// This instruction is then marked as synonymous with the ids.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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// Returns true if |type_id| is the id of a type in the module, which is one
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// of the following: Bool, Integer, Float, Vector, Matrix, Array, Struct.
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// Pointer types are also allowed if the VariablePointers capability is
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// enabled and the storage class is Workgroup or StorageBuffer.
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static bool CheckTypeIsAllowed(opt::IRContext* ir_context, uint32_t type_id);
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationAddOpPhiSynonym 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_ADD_OPPHI_SYNONYM_H_
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