Revert "Enable ThreadPool to queue tasks that return values."

This is failing to compile when LLVM_ENABLE_THREADS is false,
and the fix is not immediately obvious, so reverting while I look
into it.

llvm-svn: 334658

1 files changed, 0 insertions, 19 deletions

diff --git a/llvm/unittests/Support/ThreadPool.cpp b/llvm/unittests/Support/ThreadPool.cpp
index d2d50c3764e..0da33ad50c0 100644
--- a/llvm/unittests/Support/ThreadPool.cpp
+++ b/llvm/unittests/Support/ThreadPool.cpp
@@ -147,25 +147,6 @@ TEST_F(ThreadPoolTest, GetFuture) {
   ASSERT_EQ(2, i.load());
 }
 
-TEST_F(ThreadPoolTest, TaskWithResult) {
-  CHECK_UNSUPPORTED();
-  // By making only 1 thread in the pool the two tasks are serialized with
-  // respect to each other, which means that the second one must return 2.
-  ThreadPool Pool{1};
-  std::atomic_int i{0};
-  Pool.async([this, &i] {
-    waitForMainThread();
-    ++i;
-  });
-  // Force the future using get()
-  std::shared_future<int> Future = Pool.async([&i] { return ++i; });
-  ASSERT_EQ(0, i.load());
-  setMainThreadReady();
-  int Result = Future.get();
-  ASSERT_EQ(2, i.load());
-  ASSERT_EQ(2, Result);
-}
-
 TEST_F(ThreadPoolTest, PoolDestruction) {
   CHECK_UNSUPPORTED();
   // Test that we are waiting on destruction