[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, 2 insertions, 12 deletions

diff --git a/llvm/tools/lli/lli.cpp b/llvm/tools/lli/lli.cpp
index b23733eac99..4794fe532a5 100644
--- a/llvm/tools/lli/lli.cpp
+++ b/llvm/tools/lli/lli.cpp
@@ -752,15 +752,6 @@ static orc::IRTransformLayer2::TransformFunction createDebugDumper() {
 int runOrcLazyJIT(const char *ProgName) {
   // Start setting up the JIT environment.
 
-  // First add lli's symbols into the JIT's search space.
-  std::string ErrMsg;
-  sys::DynamicLibrary LibLLI =
-      sys::DynamicLibrary::getPermanentLibrary(nullptr, &ErrMsg);
-  if (!LibLLI.isValid()) {
-    errs() << "Error loading lli symbols: " << ErrMsg << ".\n";
-    return 1;
-  }
-
   // Parse the main module.
   orc::ThreadSafeContext TSCtx(llvm::make_unique<LLVMContext>());
   SMDiagnostic Err;
@@ -802,9 +793,8 @@ int runOrcLazyJIT(const char *ProgName) {
     }
     return Dump(std::move(TSM), R);
   });
-  J->getMainJITDylib().setFallbackDefinitionGenerator(
-      orc::DynamicLibraryFallbackGenerator(
-          std::move(LibLLI), DL, [](orc::SymbolStringPtr) { return true; }));
+  J->getMainJITDylib().setFallbackDefinitionGenerator(ExitOnErr(
+      orc::DynamicLibraryFallbackGenerator::CreateForCurrentProcess(DL)));
 
   orc::MangleAndInterner Mangle(J->getExecutionSession(), DL);
   orc::LocalCXXRuntimeOverrides2 CXXRuntimeOverrides;