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https://github.com/KhronosGroup/SPIRV-Tools
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a6b0e132ec
In this PR, the classes that represent the adjust branch weights transformation and fuzzer pass were implemented. This transformation adjusts the branch weights of a OpBranchConditional instruction.
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
// Copyright (c) 2020 André Perez Maselco
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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_ADJUST_BRANCH_WEIGHTS_H_
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#define SOURCE_FUZZ_TRANSFORMATION_ADJUST_BRANCH_WEIGHTS_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 TransformationAdjustBranchWeights : public Transformation {
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public:
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explicit TransformationAdjustBranchWeights(
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const protobufs::TransformationAdjustBranchWeights& message);
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TransformationAdjustBranchWeights(
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const protobufs::InstructionDescriptor& instruction_descriptor,
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const std::pair<uint32_t, uint32_t>& branch_weights);
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// - |message_.instruction_descriptor| must identify an existing
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// branch conditional instruction
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// - At least one of |branch_weights| must be non-zero and
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// the two weights must not overflow a 32-bit unsigned integer when added
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// together
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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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// Adjust the branch weights of a branch conditional instruction.
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void Apply(opt::IRContext* ir_context,
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TransformationContext* transformation_context) const override;
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protobufs::Transformation ToMessage() const override;
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private:
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protobufs::TransformationAdjustBranchWeights 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_ADJUST_BRANCH_WEIGHTS_H_
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