#ifndef LLVM_LINKER_LINKER_H
#define LLVM_LINKER_LINKER_H
-#include "llvm/ADT/SmallPtrSet.h"
-
-#include <functional>
+#include "llvm/IR/FunctionInfo.h"
+#include "llvm/Linker/IRMover.h"
namespace llvm {
-class DiagnosticInfo;
class Module;
class StructType;
+class Type;
/// This class provides the core functionality of linking in LLVM. It keeps a
/// pointer to the merged module so far. It doesn't take ownership of the
/// module since it is assumed that the user of this class will want to do
/// something with it after the linking.
class Linker {
- public:
- enum LinkerMode {
- DestroySource = 0, // Allow source module to be destroyed.
- PreserveSource = 1 // Preserve the source module.
- };
-
- typedef std::function<void(const DiagnosticInfo &)>
- DiagnosticHandlerFunction;
-
- Linker(Module *M, DiagnosticHandlerFunction DiagnosticHandler);
- Linker(Module *M);
- ~Linker();
-
- Module *getModule() const { return Composite; }
- void deleteModule();
-
- /// \brief Link \p Src into the composite. The source is destroyed if
- /// \p Mode is DestroySource and preserved if it is PreserveSource.
- /// If \p ErrorMsg is not null, information about any error is written
- /// to it.
- /// Returns true on error.
- bool linkInModule(Module *Src, unsigned Mode);
- bool linkInModule(Module *Src) {
- return linkInModule(Src, Linker::DestroySource);
- }
+ IRMover Mover;
+
+public:
+ enum Flags {
+ None = 0,
+ OverrideFromSrc = (1 << 0),
+ LinkOnlyNeeded = (1 << 1),
+ InternalizeLinkedSymbols = (1 << 2)
+ };
+
+ Linker(Module &M);
+
+ /// \brief Link \p Src into the composite. The source is destroyed.
+ ///
+ /// Passing OverrideSymbols as true will have symbols from Src
+ /// shadow those in the Dest.
+ /// For ThinLTO function importing/exporting the \p FunctionInfoIndex
+ /// is passed. If \p FunctionsToImport is provided, only the functions that
+ /// are part of the set will be imported from the source module.
+ ///
+ /// Returns true on error.
+ bool linkInModule(Module &Src, unsigned Flags = Flags::None,
+ const FunctionInfoIndex *Index = nullptr,
+ DenseSet<const GlobalValue *> *FunctionsToImport = nullptr);
+
+ static bool linkModules(Module &Dest, Module &Src,
+ unsigned Flags = Flags::None);
- static bool
- LinkModules(Module *Dest, Module *Src, unsigned Mode,
- DiagnosticHandlerFunction DiagnosticHandler);
-
- static bool
- LinkModules(Module *Dest, Module *Src, unsigned Mode);
-
-
- private:
- Module *Composite;
- SmallPtrSet<StructType*, 32> IdentifiedStructTypes;
- DiagnosticHandlerFunction DiagnosticHandler;
};
+/// Create a new module with exported local functions renamed and promoted
+/// for ThinLTO.
+std::unique_ptr<Module> renameModuleForThinLTO(std::unique_ptr<Module> &M,
+ const FunctionInfoIndex *Index);
+
} // End llvm namespace
#endif