Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 37 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/ExecutionEngine/MCJIT.h b/clang-r353983/include/llvm/ExecutionEngine/MCJIT.h
new file mode 100644
index 00000000..8253bf98
--- /dev/null
+++ b/clang-r353983/include/llvm/ExecutionEngine/MCJIT.h
@@ -0,0 +1,37 @@
+//===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file forces the MCJIT to link in on certain operating systems.
+// (Windows).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_MCJIT_H
+#define LLVM_EXECUTIONENGINE_MCJIT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include <cstdlib>
+
+extern "C" void LLVMLinkInMCJIT();
+
+namespace {
+  struct ForceMCJITLinking {
+    ForceMCJITLinking() {
+      // We must reference MCJIT in such a way that compilers will not
+      // delete it all as dead code, even with whole program optimization,
+      // yet is effectively a NO-OP. As the compiler isn't smart enough
+      // to know that getenv() never returns -1, this will do the job.
+      if (std::getenv("bar") != (char*) -1)
+        return;
+
+      LLVMLinkInMCJIT();
+    }
+  } ForceMCJITLinking;
+}
+
+#endif