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9a3ce89b6d
This patch replaces RuntimeDyld::SymbolInfo with JITSymbol: A symbol class that is capable of lazy materialization (i.e. the symbol definition needn't be emitted until the address is requested). This can be used to support common and weak symbols in the JIT (though this is not implemented in this patch). For consistency, RuntimeDyld::SymbolResolver is renamed to JITSymbolResolver. For space efficiency a new class, JITEvaluatedSymbol, is introduced that behaves like the old RuntimeDyld::SymbolInfo - i.e. it is just a pair of an address and symbol flags. Instances of JITEvaluatedSymbol can be used in symbol-tables to avoid paying the space cost of the materializer. llvm-svn: 277386
102 lines
3.9 KiB
C++
102 lines
3.9 KiB
C++
//===----- IRTransformLayer.h - Run all IR through a functor ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Run all IR passed in through a user supplied functor.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
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#define LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
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#include "llvm/ExecutionEngine/JITSymbol.h"
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namespace llvm {
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namespace orc {
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/// @brief IR mutating layer.
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///
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/// This layer accepts sets of LLVM IR Modules (via addModuleSet). It
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/// immediately applies the user supplied functor to each module, then adds
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/// the set of transformed modules to the layer below.
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template <typename BaseLayerT, typename TransformFtor>
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class IRTransformLayer {
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public:
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/// @brief Handle to a set of added modules.
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typedef typename BaseLayerT::ModuleSetHandleT ModuleSetHandleT;
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/// @brief Construct an IRTransformLayer with the given BaseLayer
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IRTransformLayer(BaseLayerT &BaseLayer,
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TransformFtor Transform = TransformFtor())
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: BaseLayer(BaseLayer), Transform(std::move(Transform)) {}
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/// @brief Apply the transform functor to each module in the module set, then
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/// add the resulting set of modules to the base layer, along with the
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/// memory manager and symbol resolver.
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///
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/// @return A handle for the added modules.
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template <typename ModuleSetT, typename MemoryManagerPtrT,
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typename SymbolResolverPtrT>
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ModuleSetHandleT addModuleSet(ModuleSetT Ms,
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MemoryManagerPtrT MemMgr,
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SymbolResolverPtrT Resolver) {
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for (auto I = Ms.begin(), E = Ms.end(); I != E; ++I)
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*I = Transform(std::move(*I));
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return BaseLayer.addModuleSet(std::move(Ms), std::move(MemMgr),
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std::move(Resolver));
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}
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/// @brief Remove the module set associated with the handle H.
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void removeModuleSet(ModuleSetHandleT H) { BaseLayer.removeModuleSet(H); }
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/// @brief Search for the given named symbol.
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/// @param Name The name of the symbol to search for.
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/// @param ExportedSymbolsOnly If true, search only for exported symbols.
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/// @return A handle for the given named symbol, if it exists.
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JITSymbol findSymbol(const std::string &Name, bool ExportedSymbolsOnly) {
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return BaseLayer.findSymbol(Name, ExportedSymbolsOnly);
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}
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/// @brief Get the address of the given symbol in the context of the set of
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/// modules represented by the handle H. This call is forwarded to the
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/// base layer's implementation.
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/// @param H The handle for the module set to search in.
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/// @param Name The name of the symbol to search for.
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/// @param ExportedSymbolsOnly If true, search only for exported symbols.
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/// @return A handle for the given named symbol, if it is found in the
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/// given module set.
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JITSymbol findSymbolIn(ModuleSetHandleT H, const std::string &Name,
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bool ExportedSymbolsOnly) {
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return BaseLayer.findSymbolIn(H, Name, ExportedSymbolsOnly);
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}
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/// @brief Immediately emit and finalize the module set represented by the
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/// given handle.
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/// @param H Handle for module set to emit/finalize.
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void emitAndFinalize(ModuleSetHandleT H) {
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BaseLayer.emitAndFinalize(H);
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}
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/// @brief Access the transform functor directly.
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TransformFtor& getTransform() { return Transform; }
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/// @brief Access the mumate functor directly.
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const TransformFtor& getTransform() const { return Transform; }
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private:
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BaseLayerT &BaseLayer;
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TransformFtor Transform;
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};
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} // End namespace orc.
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} // End namespace llvm.
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#endif // LLVM_EXECUTIONENGINE_ORC_IRTRANSFORMLAYER_H
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