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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.
80 lines
3.1 KiB
C++
80 lines
3.1 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_MUTATE_POINTER_H_
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#define SOURCE_FUZZ_TRANSFORMATION_MUTATE_POINTER_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 TransformationMutatePointer : public Transformation {
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public:
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explicit TransformationMutatePointer(
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const protobufs::TransformationMutatePointer& message);
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explicit TransformationMutatePointer(
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uint32_t pointer_id, uint32_t fresh_id,
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const protobufs::InstructionDescriptor& insert_before);
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// - |fresh_id| must be fresh.
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// - |insert_before| must be a valid instruction descriptor of some
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// instruction in the module.
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// - It should be possible to insert OpLoad and OpStore before
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// |insert_before|.
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// - |pointer_id| must be a result id of some instruction in the module.
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// - Instruction with result id |pointer_id| must be valid (see
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// IsValidPointerInstruction method).
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// - There must exist an irrelevant constant in the module. Type of the
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// constant must be equal to the type of the |pointer_id|'s pointee.
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// - |pointer_id| must be available (according to the dominance rules) before
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// |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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// Inserts the following instructions before |insert_before|:
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// %fresh_id = OpLoad %pointee_type_id %pointer_id
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// OpStore %pointer_id %constant_id
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// OpStore %pointer_id %fresh_id
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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 |inst| valid pointer according to the following:
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// - |inst| has result id and type id.
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// - |inst| is neither OpUndef nor OpConstantNull.
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// - |inst| has a pointer type.
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// - |inst|'s storage class is either Private, Function or Workgroup.
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// - |inst|'s pointee type and all its constituents are either scalar or
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// composite.
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static bool IsValidPointerInstruction(opt::IRContext* ir_context,
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const opt::Instruction& inst);
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private:
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protobufs::TransformationMutatePointer 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_MUTATE_POINTER_H_
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