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F2747607
polymorphcompiler.h
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Sat, Apr 18, 9:16 PM
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rXR Xreate
polymorphcompiler.h
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/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* File: polymorphcompiler.h
* Author: pgess <v.melnychenko@xreate.org>
*
* Created on October 7, 2017
*/
#ifndef POLYMORPHCOMPILER_H
#define POLYMORPHCOMPILER_H
#include "pass/compilepass.h"
#include "query/polymorph.h"
namespace xreate { namespace polymorph {
typedef Expression Guard;
template <class Parent>
class PolymorphCodeScopeUnit: public Parent{
public:
PolymorphCodeScopeUnit(const CodeScope* const codeScope, compilation::IFunctionUnit* f, CompilePass* compilePass)
: Parent(codeScope, f, compilePass) {}
protected:
compilation::ICallStatement* findFunction(const Expression& opCall) override {
//Check does invocation require guards
const std::string& nameCallee = opCall.getValueString();
const std::list<ManagedFnPtr>& specializations = Parent::pass->man->root->getFunctionSpecializations(nameCallee);
//Extern function
if (specializations.size() == 0){
return Parent::findFunction(opCall);
}
//No other specializations. Check if it has no guard
if (specializations.size() == 1){
if (!specializations.front()->guard.isValid()) {
return Parent::findFunction(opCall);
}
}
//TODO There are overlapping guards and contexts. For now, skip if context found.
if (specializations.front()->guardContext.isValid()){
return Parent::findFunction(opCall);
}
//Several specializations
assert(Attachments::exists<PolymorphGuard>(opCall) && "Guard required");
const Expression& guardSelected = Attachments::get<PolymorphGuard>(opCall);
std::map<Guard, ManagedFnPtr> indexSpecs;
for(ManagedFnPtr specialization: specializations){
indexSpecs.emplace(specialization->guard, specialization);
}
assert(indexSpecs.count(guardSelected) && "Can't found appropriate guard");
return new compilation::CallStatementRaw(Parent::pass->getFunctionUnit(indexSpecs.at(guardSelected))->compile(), Parent::pass->man->llvm);
}
};
} } //end of xreate::polymorph
#endif /* POLYMORPHCOMPILER_H */
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