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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.
95 lines
3.7 KiB
C++
95 lines
3.7 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
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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_SYNONYM_H_
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#define SOURCE_FUZZ_TRANSFORMATION_ADD_SYNONYM_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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namespace spvtools {
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namespace fuzz {
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class TransformationAddSynonym : public Transformation {
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public:
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explicit TransformationAddSynonym(
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protobufs::TransformationAddSynonym message);
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TransformationAddSynonym(
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uint32_t result_id,
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protobufs::TransformationAddSynonym::SynonymType synonym_type,
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uint32_t synonym_fresh_id,
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const protobufs::InstructionDescriptor& insert_before);
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// - |result_id| must be a valid result id of some instruction in the module.
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// - |result_id| may not be an irrelevant id.
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// - |synonym_type| is a type of the synonymous instruction that will be
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// created.
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// - |synonym_fresh_id| is a fresh id.
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// - |insert_before| must be a valid instruction descriptor and we must be
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// able to insert a new synonymous instruction before |insert_before|.
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// - |result_id| must be available before |insert_before|.
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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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// Creates a new synonymous instruction according to the |synonym_type| with
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// result id |synonym_fresh_id|.
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// Inserts that instruction before |insert_before| and creates a fact
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// that the |synonym_fresh_id| and the |result_id| are synonymous.
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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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// Returns true if we can create a synonym of |inst| according to the
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// |synonym_type|.
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static bool IsInstructionValid(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context,
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opt::Instruction* inst,
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protobufs::TransformationAddSynonym::SynonymType synonym_type);
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// Returns true if |synonym_type| requires an additional constant instruction
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// to be present in the module.
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static bool IsAdditionalConstantRequired(
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protobufs::TransformationAddSynonym::SynonymType synonym_type);
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private:
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// Returns a new instruction which is synonymous to |message_.result_id|.
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std::unique_ptr<opt::Instruction> MakeSynonymousInstruction(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const;
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// Returns a result id of a constant instruction that is required to be
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// present in some synonym types (e.g. returns a result id of a zero constant
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// for ADD_ZERO synonym type). Returns 0 if no such instruction is present in
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// the module. This method should only be called when
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// IsAdditionalConstantRequired returns true.
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uint32_t MaybeGetConstantId(
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opt::IRContext* ir_context,
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const TransformationContext& transformation_context) const;
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protobufs::TransformationAddSynonym 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_SYNONYM_H_
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