1 //===-LTOBackend.h - LLVM Link Time Optimizer Backend ---------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the "backend" phase of LTO, i.e. it performs
11 // optimization and code generation on a loaded module. It is generally used
12 // internally by the LTO class but can also be used independently, for example
13 // to implement a standalone ThinLTO backend.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_LTO_LTOBACKEND_H
18 #define LLVM_LTO_LTOBACKEND_H
19 
20 #include "llvm/ADT/MapVector.h"
21 #include "llvm/IR/DiagnosticInfo.h"
22 #include "llvm/IR/ModuleSummaryIndex.h"
23 #include "llvm/LTO/LTO.h"
24 #include "llvm/Support/MemoryBuffer.h"
25 #include "llvm/Target/TargetOptions.h"
26 #include "llvm/Transforms/IPO/FunctionImport.h"
27 
28 namespace llvm {
29 
30 class BitcodeModule;
31 class Error;
32 class Module;
33 class Target;
34 
35 namespace lto {
36 
37 /// Runs a regular LTO backend. The regular LTO backend can also act as the
38 /// regular LTO phase of ThinLTO, which may need to access the combined index.
39 Error backend(Config &C, AddStreamFn AddStream,
40               unsigned ParallelCodeGenParallelismLevel,
41               std::unique_ptr<Module> M, ModuleSummaryIndex &CombinedIndex);
42 
43 /// Runs a ThinLTO backend.
44 Error thinBackend(Config &C, unsigned Task, AddStreamFn AddStream, Module &M,
45                   const ModuleSummaryIndex &CombinedIndex,
46                   const FunctionImporter::ImportMapTy &ImportList,
47                   const GVSummaryMapTy &DefinedGlobals,
48                   MapVector<StringRef, BitcodeModule> &ModuleMap);
49 }
50 }
51 
52 #endif
53