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03b19f3f7e
All of this is in service of working around a pile of deficiencies in LLVM's Module Linker, and LLVMContext abstractions. And because we're just gonna scrap this code soon anyways, it's probably not worth the effort to push on these bugs to block the broader cleanup here. The LLVM Linker currently does not support linking modules allocated in different contexts. This appears to be motivated in part by LLVM's lack of a facility to clone a module from one context to another. This, in turn, appears to be motivated in part by LLVMContext's lack of a robust notion of identity - which makes it harder than it needs to be to detect the mismatch. However, it is not impossible to clone a module across contexts. We need to get creative and round-trip the module through some serialization layer. Out of convenience, that layer is currently textual IR, though bitcode would work equally well. Given that it is no longer under the caller's control which LLVMContext we generate code in, put all the above together to arrive at an egregious hack that clones the module into the LLVMContext the REPL expects.
55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
//===--- ImmediateImpl.h - Support functions for immediate mode -*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IMMEDIATEIMPL_H
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#define SWIFT_IMMEDIATEIMPL_H
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#include "swift/AST/LinkLibrary.h"
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#include "swift/AST/SearchPathOptions.h"
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#include "swift/Basic/LLVM.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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namespace llvm {
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class Function;
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class Module;
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}
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namespace swift {
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class CompilerInstance;
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class DiagnosticEngine;
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class GeneratedModule;
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class IRGenOptions;
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class ModuleDecl;
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class SILOptions;
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namespace immediate {
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/// Returns a handle to the runtime suitable for other \c dlsym or \c dlclose
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/// calls or \c null if an error occurred.
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///
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/// \param runtimeLibPaths Paths to search for stdlib dylibs.
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void *loadSwiftRuntime(ArrayRef<std::string> runtimeLibPaths);
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bool tryLoadLibraries(ArrayRef<LinkLibrary> LinkLibraries,
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SearchPathOptions SearchPathOpts,
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DiagnosticEngine &Diags);
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bool linkLLVMModules(llvm::Module *Module,
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std::unique_ptr<llvm::Module> &&SubModule);
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bool autolinkImportedModules(ModuleDecl *M, const IRGenOptions &IRGenOpts);
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} // end namespace immediate
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} // end namespace swift
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#endif
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