1//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This header file pulls in all codegen related passes for tools like lli and
10// llc that need this functionality.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
15#define LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
16
17#include "llvm/CodeGen/Passes.h"
18#include "llvm/CodeGen/SchedulerRegistry.h"
19#include "llvm/Target/TargetMachine.h"
20#include <cstdlib>
21
22namespace {
23 struct ForceCodegenLinking {
24 ForceCodegenLinking() {
25 // We must reference the passes in such a way that compilers will not
26 // delete it all as dead code, even with whole program optimization,
27 // yet is effectively a NO-OP. As the compiler isn't smart enough
28 // to know that getenv() never returns -1, this will do the job.
29 // This is so that globals in the translation units where these functions
30 // are defined are forced to be initialized, populating various
31 // registries.
32 if (std::getenv(name: "bar") != (char*) -1)
33 return;
34
35 (void) llvm::createFastRegisterAllocator();
36 (void) llvm::createBasicRegisterAllocator();
37 (void) llvm::createGreedyRegisterAllocator();
38 (void) llvm::createDefaultPBQPRegisterAllocator();
39
40 (void)llvm::createBURRListDAGScheduler(IS: nullptr,
41 OptLevel: llvm::CodeGenOptLevel::Default);
42 (void)llvm::createSourceListDAGScheduler(IS: nullptr,
43 OptLevel: llvm::CodeGenOptLevel::Default);
44 (void)llvm::createHybridListDAGScheduler(IS: nullptr,
45 llvm::CodeGenOptLevel::Default);
46 (void)llvm::createFastDAGScheduler(IS: nullptr,
47 OptLevel: llvm::CodeGenOptLevel::Default);
48 (void)llvm::createDefaultScheduler(IS: nullptr,
49 OptLevel: llvm::CodeGenOptLevel::Default);
50 (void)llvm::createVLIWDAGScheduler(IS: nullptr,
51 OptLevel: llvm::CodeGenOptLevel::Default);
52 }
53 } ForceCodegenLinking; // Force link by creating a global definition.
54}
55
56#endif
57

source code of llvm/include/llvm/CodeGen/LinkAllCodegenComponents.h