MCJIT: Stub out MCJIT implementation, still doesn't do anything useful.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119509 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/include/llvm/ExecutionEngine/MCJIT.h b/include/llvm/ExecutionEngine/MCJIT.h
new file mode 100644
index 0000000..f956a50
--- /dev/null
+++ b/include/llvm/ExecutionEngine/MCJIT.h
@@ -0,0 +1,38 @@
+//===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file forces the MCJIT to link in on certain operating systems.
+// (Windows).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTION_ENGINE_MCJIT_H
+#define LLVM_EXECUTION_ENGINE_MCJIT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include <cstdlib>
+
+extern "C" void LLVMLinkInMCJIT();
+
+namespace {
+  struct ForceMCJITLinking {
+    ForceMCJITLinking() {
+      // We must reference the passes 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