[ORC] Add convenience methods for creating DynamicLibraryFallbackGenerators for

libraries on disk, and for the current process.

Avoids more boilerplate during JIT construction.

llvm-svn: 343430

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/ExecutionUtils.cpp b/llvm/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
index e9e27453c32..29c3f4e5636 100644
--- a/llvm/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
@@ -174,6 +174,15 @@ DynamicLibraryFallbackGenerator::DynamicLibraryFallbackGenerator(
     : Dylib(std::move(Dylib)), Allow(std::move(Allow)),
       GlobalPrefix(DL.getGlobalPrefix()) {}
 
+Expected<DynamicLibraryFallbackGenerator> DynamicLibraryFallbackGenerator::Load(
+    const char *FileName, const DataLayout &DL, SymbolPredicate Allow) {
+  std::string ErrMsg;
+  auto Lib = sys::DynamicLibrary::getPermanentLibrary(FileName, &ErrMsg);
+  if (!Lib.isValid())
+    return make_error<StringError>(std::move(ErrMsg), inconvertibleErrorCode());
+  return DynamicLibraryFallbackGenerator(std::move(Lib), DL, std::move(Allow));
+}
+
 SymbolNameSet DynamicLibraryFallbackGenerator::
 operator()(JITDylib &JD, const SymbolNameSet &Names) {
   orc::SymbolNameSet Added;