Re-apply "[ORC] Unify task dispatch across ExecutionSession and..." with fix.

This re-applies 6094b3b7db7, which was reverted in a28557aadd8 due to broken
bots. As far as I can tell all failures were due to a missing #include <deque>,
which has been adedd in this commit.

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
index 09b2a59..bff05b9 100644
--- a/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
+++ b/llvm/tools/llvm-jitlink/llvm-jitlink.cpp
@@ -807,8 +807,8 @@ static Expected<std::unique_ptr<ExecutorProcessControl>> launchExecutor() {
     S.CreateMemoryManager = createSharedMemoryManager;
 
   return SimpleRemoteEPC::Create<FDSimpleRemoteEPCTransport>(
-      std::make_unique<DynamicThreadPoolTaskDispatcher>(), std::move(S),
-      FromExecutor[ReadEnd], ToExecutor[WriteEnd]);
+      std::make_unique<DynamicThreadPoolTaskDispatcher>(std::nullopt),
+      std::move(S), FromExecutor[ReadEnd], ToExecutor[WriteEnd]);
 #endif
 }
 
@@ -897,7 +897,7 @@ static Expected<std::unique_ptr<ExecutorProcessControl>> connectToExecutor() {
     S.CreateMemoryManager = createSharedMemoryManager;
 
   return SimpleRemoteEPC::Create<FDSimpleRemoteEPCTransport>(
-      std::make_unique<DynamicThreadPoolTaskDispatcher>(),
+      std::make_unique<DynamicThreadPoolTaskDispatcher>(std::nullopt),
       std::move(S), *SockFD, *SockFD);
 #endif
 }