Revert "[clang-repl] Adapt to the recent dylib-related changes in ORC."

This reverts commit 196d856 while investigating
bot failure: https://lab.llvm.org/buildbot/#/builders/216/builds/26444

clang/lib/Interpreter/IncrementalExecutor.cpp

@@ -92,19 +92,12 @@ llvm::Error IncrementalExecutor::runCtors() const {
 llvm::Expected<llvm::orc::ExecutorAddr>
 IncrementalExecutor::getSymbolAddress(llvm::StringRef Name,
                                       SymbolNameKind NameKind) const {
-  using namespace llvm::orc;
-  auto SO = makeJITDylibSearchOrder({&Jit->getMainJITDylib(),
-                                     Jit->getPlatformJITDylib().get(),
-                                     Jit->getProcessSymbolsJITDylib().get()});
-
-  ExecutionSession &ES = Jit->getExecutionSession();
-
-  auto SymOrErr =
-      ES.lookup(SO, (NameKind == LinkerName) ? ES.intern(Name)
-                                             : Jit->mangleAndIntern(Name));
-  if (auto Err = SymOrErr.takeError())
-    return std::move(Err);
-  return SymOrErr->getAddress();
+  auto Sym = (NameKind == LinkerName) ? Jit->lookupLinkerMangled(Name)
+                                      : Jit->lookup(Name);
+
+  if (!Sym)
+    return Sym.takeError();
+  return Sym;
 }
 
 } // end namespace clang

clang/unittests/Interpreter/InterpreterTest.cpp

@@ -234,16 +234,10 @@ TEST(IncrementalProcessing, FindMangledNameSymbol) {
   }
 
   std::string MangledName = MangleName(FD);
-  auto Addr = Interp->getSymbolAddress(MangledName);
-  EXPECT_FALSE(!Addr);
-  EXPECT_NE(0U, Addr->getValue());
+  auto Addr = cantFail(Interp->getSymbolAddress(MangledName));
+  EXPECT_NE(0U, Addr.getValue());
   GlobalDecl GD(FD);
-  EXPECT_EQ(*Addr, cantFail(Interp->getSymbolAddress(GD)));
-  cantFail(
-      Interp->ParseAndExecute("extern \"C\" int printf(const char*,...);"));
-  Addr = Interp->getSymbolAddress("printf");
-  EXPECT_FALSE(!Addr);
-  EXPECT_EQ((unsigned long long)&printf, Addr->getValue());
+  EXPECT_EQ(Addr, cantFail(Interp->getSymbolAddress(GD)));
 }
 
 static void *AllocateObject(TypeDecl *TD, Interpreter &Interp) {