blob: 565d1c36d3001410563c16032a1147fdeedb4de2 [file] [log] [blame]
//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// This header file pulls in all codegen related passes for tools like lli and
// llc that need this functionality.
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/SchedulerRegistry.h"
#include "llvm/Target/TargetMachine.h"
#include <cstdlib>
namespace {
struct ForceCodegenLinking {
ForceCodegenLinking() {
// 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.
// 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)
(void) llvm::createFastRegisterAllocator();
(void) llvm::createBasicRegisterAllocator();
(void) llvm::createGreedyRegisterAllocator();
(void) llvm::createDefaultPBQPRegisterAllocator();
(void) llvm::createBURRListDAGScheduler(nullptr,
(void) llvm::createSourceListDAGScheduler(nullptr,
(void) llvm::createHybridListDAGScheduler(nullptr,
(void) llvm::createFastDAGScheduler(nullptr, llvm::CodeGenOpt::Default);
(void) llvm::createDefaultScheduler(nullptr, llvm::CodeGenOpt::Default);
(void) llvm::createVLIWDAGScheduler(nullptr, llvm::CodeGenOpt::Default);
} ForceCodegenLinking; // Force link by creating a global definition.