1 // Copyright (c) 2017 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef SOURCE_OPT_FEATURE_MANAGER_H_ 16 #define SOURCE_OPT_FEATURE_MANAGER_H_ 17 18 #include "source/assembly_grammar.h" 19 #include "source/extensions.h" 20 #include "source/opt/module.h" 21 22 namespace spvtools { 23 namespace opt { 24 25 // Tracks features enabled by a module. The IRContext has a FeatureManager. 26 class FeatureManager { 27 public: 28 explicit FeatureManager(const AssemblyGrammar& grammar) : grammar_(grammar) {} 29 30 // Returns true if |ext| is an enabled extension in the module. 31 bool HasExtension(Extension ext) const { return extensions_.Contains(ext); } 32 33 // Returns true if |cap| is an enabled capability in the module. 34 bool HasCapability(SpvCapability cap) const { 35 return capabilities_.Contains(cap); 36 } 37 38 // Analyzes |module| and records enabled extensions and capabilities. 39 void Analyze(Module* module); 40 41 CapabilitySet* GetCapabilities() { return &capabilities_; } 42 const CapabilitySet* GetCapabilities() const { return &capabilities_; } 43 44 uint32_t GetExtInstImportId_GLSLstd450() const { 45 return extinst_importid_GLSLstd450_; 46 } 47 48 private: 49 // Analyzes |module| and records enabled extensions. 50 void AddExtensions(Module* module); 51 52 // Adds the given |capability| and all implied capabilities into the current 53 // FeatureManager. 54 void AddCapability(SpvCapability capability); 55 56 // Analyzes |module| and records enabled capabilities. 57 void AddCapabilities(Module* module); 58 59 // Analyzes |module| and records imported external instruction sets. 60 void AddExtInstImportIds(Module* module); 61 62 // Auxiliary object for querying SPIR-V grammar facts. 63 const AssemblyGrammar& grammar_; 64 65 // The enabled extensions. 66 ExtensionSet extensions_; 67 68 // The enabled capabilities. 69 CapabilitySet capabilities_; 70 71 // Common external instruction import ids, cached for performance. 72 uint32_t extinst_importid_GLSLstd450_ = 0; 73 }; 74 75 } // namespace opt 76 } // namespace spvtools 77 78 #endif // SOURCE_OPT_FEATURE_MANAGER_H_ 79
