Get JIT/Interpreter working on Windows again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27037 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 39 insertions, 0 deletions

diff --git a/include/llvm/ExecutionEngine/Interpreter.h b/include/llvm/ExecutionEngine/Interpreter.h
new file mode 100644
index 0000000000..bb11d02596
--- /dev/null
+++ b/include/llvm/ExecutionEngine/Interpreter.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_INTERPRETER_H
+#define EXECUTION_ENGINE_INTERPRETER_H
+
+#include "llvm/ExecutionEngine/ExecutionEngine.h"
+
+namespace llvm {
+  extern void LinkInInterpreter();
+}
+
+namespace {
+  struct ForceInterpreterLinking {
+    ForceInterpreterLinking() {
+      // 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::LinkInInterpreter();
+    }
+  } ForceInterpreterLinking;
+}
+
+#endif