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https://github.com/KhronosGroup/SPIRV-Tools
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Id descriptors are computed as a recursive hash of all instructions used to define an id. Descriptors are invarint of actual id values and the similar code in different files would produce the same descriptors. Multiple ids can have the same descriptor. For example %1 = OpConstant %u32 1 %2 = OpConstant %u32 1 would produce two ids with the same descriptor. But %3 = OpConstant %s32 1 %4 = OpConstant %u32 2 would have descriptors different from %1 and %2. Descriptors will be used as handles of move-to-front sequences in SPIR-V compression.
82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
// Copyright (c) 2017 Google Inc.
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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 LIBSPIRV_TOOLS_STATS_STATS_ANALYZER_H_
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#define LIBSPIRV_TOOLS_STATS_STATS_ANALYZER_H_
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#include <unordered_map>
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#include "source/spirv_stats.h"
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class StatsAnalyzer {
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public:
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explicit StatsAnalyzer(const libspirv::SpirvStats& stats);
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// Writes respective histograms to |out|.
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void WriteVersion(std::ostream& out);
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void WriteGenerator(std::ostream& out);
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void WriteCapability(std::ostream& out);
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void WriteExtension(std::ostream& out);
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void WriteOpcode(std::ostream& out);
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void WriteConstantLiterals(std::ostream& out);
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// Writes first order Markov analysis to |out|.
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// stats_.opcode_markov_hist needs to contain raw data for at least one
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// level.
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void WriteOpcodeMarkov(std::ostream& out);
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// Writes C++ code containing a function returning opcode histogram.
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void WriteCodegenOpcodeHist(std::ostream& out);
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// Writes C++ code containing a function returning opcode_and_num_operands
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// histogram.
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void WriteCodegenOpcodeAndNumOperandsHist(std::ostream& out);
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// Writes C++ code containing a function returning a map of Huffman codecs
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// for opcode_and_num_operands. Each Huffman codec is created for a specific
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// previous opcode.
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// TODO(atgoo@github.com) Write code which would contain pregenerated Huffman
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// codecs, instead of code which would generate them every time.
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void WriteCodegenOpcodeAndNumOperandsMarkovHuffmanCodecs(std::ostream& out);
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// Writes C++ code containing a function returning a map of Huffman codecs
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// for literal strings. Each Huffman codec is created for a specific opcode.
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// I.e. OpExtension and OpExtInstImport would use different codecs.
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void WriteCodegenLiteralStringHuffmanCodecs(std::ostream& out);
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// Writes C++ code containing a function returning a map of Huffman codecs
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// for single-word non-id operands. Each Huffman codec is created for a
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// specific operand slot (opcode and operand number).
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void WriteCodegenNonIdWordHuffmanCodecs(std::ostream& out);
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// Writes C++ code containing a function returning a map of Huffman codecs
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// for common id descriptors. Each Huffman codec is created for a
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// specific operand slot (opcode and operand number).
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void WriteCodegenIdDescriptorHuffmanCodecs(std::ostream& out);
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private:
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const libspirv::SpirvStats& stats_;
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uint32_t num_modules_;
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std::unordered_map<uint32_t, double> version_freq_;
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std::unordered_map<uint32_t, double> generator_freq_;
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std::unordered_map<uint32_t, double> capability_freq_;
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std::unordered_map<std::string, double> extension_freq_;
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std::unordered_map<uint32_t, double> opcode_freq_;
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};
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#endif // LIBSPIRV_TOOLS_STATS_STATS_ANALYZER_H_
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