/usr/include/llvm-3.9/llvm/LTO/LTO.h is in llvm-3.9-dev 1:3.9.1-19ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | //===-LTO.h - LLVM Link Time Optimizer ------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file declares functions and classes used to support LTO. It is intended
// to be used both by LTO classes as well as by clients (gold-plugin) that
// don't utilize the LTO code generator interfaces.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LTO_LTO_H
#define LLVM_LTO_LTO_H
#include "llvm/ADT/StringMap.h"
#include "llvm/IR/ModuleSummaryIndex.h"
namespace llvm {
class LLVMContext;
class MemoryBufferRef;
class Module;
/// Helper to load a module from bitcode.
std::unique_ptr<Module> loadModuleFromBuffer(const MemoryBufferRef &Buffer,
LLVMContext &Context, bool Lazy);
/// Provide a "loader" for the FunctionImporter to access function from other
/// modules.
class ModuleLoader {
/// The context that will be used for importing.
LLVMContext &Context;
/// Map from Module identifier to MemoryBuffer. Used by clients like the
/// FunctionImported to request loading a Module.
StringMap<MemoryBufferRef> &ModuleMap;
public:
ModuleLoader(LLVMContext &Context, StringMap<MemoryBufferRef> &ModuleMap)
: Context(Context), ModuleMap(ModuleMap) {}
/// Load a module on demand.
std::unique_ptr<Module> operator()(StringRef Identifier) {
return loadModuleFromBuffer(ModuleMap[Identifier], Context, /*Lazy*/ true);
}
};
/// Resolve Weak and LinkOnce values in the \p Index. Linkage changes recorded
/// in the index and the ThinLTO backends must apply the changes to the Module
/// via thinLTOResolveWeakForLinkerModule.
///
/// This is done for correctness (if value exported, ensure we always
/// emit a copy), and compile-time optimization (allow drop of duplicates).
void thinLTOResolveWeakForLinkerInIndex(
ModuleSummaryIndex &Index,
function_ref<bool(GlobalValue::GUID, const GlobalValueSummary *)>
isPrevailing,
function_ref<void(StringRef, GlobalValue::GUID, GlobalValue::LinkageTypes)>
recordNewLinkage);
/// Update the linkages in the given \p Index to mark exported values
/// as external and non-exported values as internal. The ThinLTO backends
/// must apply the changes to the Module via thinLTOInternalizeModule.
void thinLTOInternalizeAndPromoteInIndex(
ModuleSummaryIndex &Index,
function_ref<bool(StringRef, GlobalValue::GUID)> isExported);
}
#endif
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