llvm-6502/include/llvm/ExecutionEngine/JIT.h
2013-01-10 00:45:19 +00:00

39 lines
1.1 KiB
C++

//===-- JIT.h - Abstract Execution Engine Interface -------------*- 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 JIT to link in on certain operating systems.
// (Windows).
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EXECUTIONENGINE_JIT_H
#define LLVM_EXECUTIONENGINE_JIT_H
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include <cstdlib>
extern "C" void LLVMLinkInJIT();
namespace {
struct ForceJITLinking {
ForceJITLinking() {
// We must reference JIT 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;
LLVMLinkInJIT();
}
} ForceJITLinking;
}
#endif