Get JIT/Interpreter working on Windows again.

[oota-llvm.git] / include / llvm / ExecutionEngine / JIT.h

diff --git a/include/llvm/ExecutionEngine/JIT.h b/include/llvm/ExecutionEngine/JIT.h
new file mode 100644 (file)
index 0000000..8f17be1
--- /dev/null
+++ b/include/llvm/ExecutionEngine/JIT.h
@@ -0,0 +1,39 @@
+//===- ExecutionEngine.h - Abstract Execution Engine Interface --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Jeff Cohen and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file forces the interpreter to link in on certain operating systems.
+// (Windows).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef EXECUTION_ENGINE_JIT_H
+#define EXECUTION_ENGINE_JIT_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+
+namespace llvm {
+  extern void LinkInJIT();
+}
+
+namespace {
+  struct ForceJITLinking {
+    ForceJITLinking() {
+      // 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;
+
+      llvm::LinkInJIT();
+    }
+  } ForceJITLinking;
+}
+
+#endif