Revert "Support: add llvm::thread class that supports specifying stack size."

It's causing build failures because DefaultStackSize isn't defined everywhere
it should be and I need time to investigate.

1 files changed, 2 insertions, 15 deletions

diff --git a/llvm/unittests/Support/Threading.cpp b/llvm/unittests/Support/Threading.cpp
index 69a29872b18e..c76e6e4a5bd1 100644
--- a/llvm/unittests/Support/Threading.cpp
+++ b/llvm/unittests/Support/Threading.cpp
@@ -63,8 +63,7 @@ TEST(Threading, RunOnThreadSyncAsync) {
     ThreadFinished.notify();
   };
 
-  llvm::thread Thread(ThreadFunc);
-  Thread.detach();
+  llvm::llvm_execute_on_thread_async(ThreadFunc);
   ASSERT_TRUE(ThreadStarted.wait());
   ThreadAdvanced.notify();
   ASSERT_TRUE(ThreadFinished.wait());
@@ -72,23 +71,11 @@ TEST(Threading, RunOnThreadSyncAsync) {
 
 TEST(Threading, RunOnThreadSync) {
   std::atomic_bool Executed(false);
-  llvm::thread Thread(
+  llvm::llvm_execute_on_thread(
       [](void *Arg) { *static_cast<std::atomic_bool *>(Arg) = true; },
       &Executed);
-  Thread.join();
   ASSERT_EQ(Executed, true);
 }
-
-#if defined(__APPLE__)
-TEST(Threading, AppleStackSize) {
-  llvm::thread Thread([] {
-    volatile unsigned char Var[8 * 1024 * 1024 - 1024];
-    Var[0] = 0xff;
-    ASSERT_EQ(Var[0], 0xff);
-  });
-  Thread.join();
-}
-#endif
 #endif
 
 } // end anon namespace