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https://github.com/KhronosGroup/SPIRV-Tools
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fe10239f92
This change adds fuzzer passes that sprinkle loads and stores into a module at random, with stores restricted to occur in either dead blocks, or to use pointers for which it is known that the pointee value does not influence the module's overall behaviour. The change also generalises the VariableValueIsArbitrary fact to PointeeValueIsIrrelevant, to allow stores through access chains or object copies of variables whose values are known to be irrelevant. The change includes some other minor refactorings.
61 lines
2.3 KiB
C++
61 lines
2.3 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_LOCAL_VARIABLE_H_
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#define SOURCE_FUZZ_TRANSFORMATION_ADD_LOCAL_VARIABLE_H_
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#include "source/fuzz/fact_manager.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/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationAddLocalVariable : public Transformation {
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public:
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explicit TransformationAddLocalVariable(
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const protobufs::TransformationAddLocalVariable& message);
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TransformationAddLocalVariable(uint32_t fresh_id, uint32_t type_id,
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uint32_t function_id, uint32_t initializer_id,
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bool value_is_irrelevant);
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// - |message_.fresh_id| must not be used by the module
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// - |message_.type_id| must be the id of a pointer type with Function
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// storage class
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// - |message_.initializer_id| must be the id of a constant with the same
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// type as the pointer's pointee type
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// - |message_.function_id| must be the id of a function
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bool IsApplicable(opt::IRContext* context,
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const FactManager& fact_manager) const override;
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// Adds an instruction to the start of |message_.function_id|, of the form:
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// |message_.fresh_id| = OpVariable |message_.type_id| Function
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// |message_.initializer_id|
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// If |message_.value_is_irrelevant| holds, adds a corresponding fact to
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// |fact_manager|.
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void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationAddLocalVariable 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_LOCAL_VARIABLE_H_
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