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//===-- 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.
// This is so that globals in the translation units where these functions
// are defined are forced to be initialized, populating various
// registries.
if (std::getenv("bar") != (char*) -1)
return;
LLVMLinkInMCJIT();
}
} ForceMCJITLinking;
}
#endif
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