tools/lto/lto-c.cpp

   1 //===- lto-c.cpp - LLVM Link Time Optimizer C Wrappers --------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by Chandler Carruth and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements a C wrapper API for the Link Time Optimization
  11 // library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm-c/LinkTimeOptimizer.h"
  16 #include "llvm/LinkTimeOptimizer.h"
  17 using namespace llvm;
  18
  19
  20 /// Create an instance of the LLVM LTO object for performing the link
  21 /// time optimizations.
  22 extern "C"
  23 llvm_lto_t llvm_create_optimizer() {
  24   return new llvm::LTO();
  25 }
  26
  27 /// Destroy an instance of the LLVM LTO object
  28 extern "C"
  29 void llvm_destroy_optimizer(llvm_lto_t lto) {
  30   delete (llvm::LTO*)lto;
  31 }
  32
  33 /// Read an LLVM bytecode file using LTO::readLLVMObjectFile.
  34 extern "C"
  35 llvm_lto_status
  36 llvm_read_object_file(llvm_lto_t lto, const char *input_filename) {
  37   llvm::LTO *l = (llvm::LTO*)lto;
  38
  39   if (input_filename == NULL)
  40     return LLVM_LTO_READ_FAILURE;
  41
  42   std::string InputFilename(input_filename);
  43   llvm::LTO::NameToSymbolMap symbols;
  44   std::set<std::string> references;
  45   return (llvm_lto_status)((int)(l->readLLVMObjectFile(InputFilename, symbols,
  46                                                        references)));
  47 }
  48
  49
  50 /// Optimize and output object code using LTO::optimizeModules.
  51 extern "C"
  52 llvm_lto_status
  53 llvm_optimize_modules(llvm_lto_t lto, const char *output_filename) {
  54   llvm::LTO *l = (llvm::LTO*)lto;
  55
  56   std::string OutputFilename(output_filename);
  57   std::vector<const char *> exportList;
  58   std::string targetTriple;
  59
  60   return (llvm_lto_status)((int)(
  61     l->optimizeModules(OutputFilename, exportList,
  62                        targetTriple, false, "")));
  63 }
  64
  65
  66