6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
//===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file forces the MCJIT to link in on certain operating systems.
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// (Windows).
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_MCJIT_H
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#define LLVM_EXECUTIONENGINE_MCJIT_H
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include <cstdlib>
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extern "C" void LLVMLinkInMCJIT();
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namespace {
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struct ForceMCJITLinking {
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ForceMCJITLinking() {
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// We must reference MCJIT in such a way that compilers will not
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// delete it all as dead code, even with whole program optimization,
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// yet is effectively a NO-OP. As the compiler isn't smart enough
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// to know that getenv() never returns -1, this will do the job.
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// This is so that globals in the translation units where these functions
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// are defined are forced to be initialized, populating various
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// registries.
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if (std::getenv("bar") != (char*) -1)
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return;
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LLVMLinkInMCJIT();
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}
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} ForceMCJITLinking;
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}
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#endif
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