diff --git a/include/llvm-c/lto.h b/include/llvm-c/lto.h
index 40110fddfc1..907007c6525 100644
--- a/include/llvm-c/lto.h
+++ b/include/llvm-c/lto.h
@@ -27,7 +27,7 @@
  * @{
  */
 
-#define LTO_API_VERSION 4
+#define LTO_API_VERSION 5
 
 typedef enum {
     LTO_SYMBOL_ALIGNMENT_MASK              = 0x0000001F, /* log2 of alignment */
@@ -284,6 +284,22 @@ lto_codegen_compile(lto_code_gen_t cg, size_t* length);
 extern bool
 lto_codegen_compile_to_file(lto_code_gen_t cg, const char** name);
 
+struct NativeObjectFile {
+  const void *content;
+  size_t length;
+};
+
+/**
+ * Generates code for merged module into an array of native object files.
+ * On success returns a pointer to an array of NativeObjectFile.  The
+ * count parameter returns the number of elements in the array.  Each
+ * element is a pointer/length for a generated mach-o/ELF buffer. The
+ * buffer is owned by the lto_code_gen_t and will be freed when
+ * lto_codegen_dispose() is called, or lto_codegen_compile() is called again.
+ * On failure, returns NULL (check lto_get_error_message() for details).
+ */
+extern const struct NativeObjectFile*
+lto_codegen_compile_parallel(lto_code_gen_t cg, size_t *count);
 
 /**
  * Sets options to help debug codegen bugs.
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index 3fe7af25afd..daeb9648e30 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -74,7 +74,7 @@ LTOCodeGenerator::LTOCodeGenerator()
     _linker(new Module("ld-temp.o", _context)), _target(NULL),
     _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
     _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
-    _nativeObjectFile(NULL) {
+    _nativeObjectFile(NULL), ObjBufVect(0) {
   InitializeAllTargets();
   InitializeAllTargetMCs();
   InitializeAllAsmPrinters();
@@ -85,6 +85,7 @@ LTOCodeGenerator::~LTOCodeGenerator() {
   delete _target;
   delete _nativeObjectFile;
   delete _linker.getModule();
+  delete[] ObjBufVect;
 
   for (std::vector<char*>::iterator I = _codegenOptions.begin(),
          E = _codegenOptions.end(); I != E; ++I)
@@ -246,6 +247,23 @@ const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg) {
   return _nativeObjectFile->getBufferStart();
 }
 
+// Currently compile() and compile_parallel() have no difference.
+NativeObjectFile *LTOCodeGenerator::compile_parallel(size_t *count,
+                                                     std::string &ErrMsg) {
+  assert(ObjBufVect == 0 && "Should be NULL");
+
+  size_t Len;
+  const void *Buf = compile(&Len, ErrMsg);
+  if (!Buf)
+    return 0;
+
+  *count = 1;
+  ObjBufVect = new NativeObjectFile[1];
+  ObjBufVect[0].content = Buf;
+  ObjBufVect[0].length = Len;
+  return ObjBufVect;
+}
+
 bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
   if (_target != NULL)
     return true;
diff --git a/tools/lto/LTOCodeGenerator.h b/tools/lto/LTOCodeGenerator.h
index 8f37cf0e1d5..21c6b212925 100644
--- a/tools/lto/LTOCodeGenerator.h
+++ b/tools/lto/LTOCodeGenerator.h
@@ -102,6 +102,17 @@ struct LTOCodeGenerator {
   //
   const void *compile(size_t *length, std::string &errMsg);
 
+  // Corresponding to lto_codegen_compile_parallel() API. 
+  // Generates code for merged module into an array of native object files.
+  // On success returns a pointer to an array of NativeObjectFile.  The count
+  // parameter returns the number of elements in the array.  Each element is
+  // a pointer/length for a generated mach-o/ELF buffer. The buffer is owned
+  // by the lto_code_gen_t and will be freed when lto_codegen_dispose() is
+  // called, or lto_codegen_compile() is called again. On failure, returns
+  // NULL (check lto_get_error_message() for details).
+  //
+  NativeObjectFile *compile_parallel(size_t *count, std::string &ErrMsg);
+
 private:
   void initializeLTOPasses();
 
@@ -127,6 +138,7 @@ private:
   std::vector<char*>          _codegenOptions;
   std::string                 _mCpu;
   std::string                 _nativeObjectPath;
+  NativeObjectFile *ObjBufVect;
 };
 
 #endif // LTO_CODE_GENERATOR_H
diff --git a/tools/lto/lto.cpp b/tools/lto/lto.cpp
index db7147c2bc7..bbb6071ce8a 100644
--- a/tools/lto/lto.cpp
+++ b/tools/lto/lto.cpp
@@ -207,6 +207,11 @@ bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
   return !cg->compile_to_file(name, sLastErrorString);
 }
 
+extern const struct NativeObjectFile *
+lto_codegen_compile_parallel(lto_code_gen_t cg, size_t *count) {
+  return cg->compile_parallel(count, sLastErrorString);
+}
+
 /// lto_codegen_debug_options - Used to pass extra options to the code
 /// generator.
 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
diff --git a/tools/lto/lto.exports b/tools/lto/lto.exports
index 46d0d74c82a..61f0817f335 100644
--- a/tools/lto/lto.exports
+++ b/tools/lto/lto.exports
@@ -28,6 +28,7 @@ lto_codegen_set_assembler_args
 lto_codegen_set_assembler_path
 lto_codegen_set_cpu
 lto_codegen_compile_to_file
+lto_codegen_compile_parallel
 LLVMCreateDisasm
 LLVMCreateDisasmCPU
 LLVMDisasmDispose