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// Copyright (c) 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef LIBSPIRV_OPT_FEATURE_MANAGER_H_
#define LIBSPIRV_OPT_FEATURE_MANAGER_H_
#include "assembly_grammar.h"
#include "extensions.h"
#include "module.h"
namespace spvtools {
namespace opt {
// Tracks features enabled by a module. The IRContext has a FeatureManager.
class FeatureManager {
public:
explicit FeatureManager(const libspirv::AssemblyGrammar& grammar)
: grammar_(grammar) {}
// Returns true if |ext| is an enabled extension in the module.
bool HasExtension(libspirv::Extension ext) const {
return extensions_.Contains(ext);
}
// Returns true if |cap| is an enabled capability in the module.
bool HasCapability(SpvCapability cap) const {
return capabilities_.Contains(cap);
}
// Analyzes |module| and records enabled extensions and capabilities.
void Analyze(ir::Module* module);
libspirv::CapabilitySet* GetCapabilities() { return &capabilities_; }
const libspirv::CapabilitySet* GetCapabilities() const {
return &capabilities_;
}
uint32_t GetExtInstImportId_GLSLstd450() const {
return extinst_importid_GLSLstd450_;
}
private:
// Analyzes |module| and records enabled extensions.
void AddExtensions(ir::Module* module);
// Adds the given |capability| and all implied capabilities into the current
// FeatureManager.
void AddCapability(SpvCapability capability);
// Analyzes |module| and records enabled capabilities.
void AddCapabilities(ir::Module* module);
// Analyzes |module| and records imported external instruction sets.
void AddExtInstImportIds(ir::Module* module);
// Auxiliary object for querying SPIR-V grammar facts.
const libspirv::AssemblyGrammar& grammar_;
// The enabled extensions.
libspirv::ExtensionSet extensions_;
// The enabled capabilities.
libspirv::CapabilitySet capabilities_;
// Common external instruction import ids, cached for performance.
uint32_t extinst_importid_GLSLstd450_ = 0;
};
} // namespace opt
} // namespace spvtools
#endif // LIBSPIRV_OPT_FEATURE_MANAGER_H_
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