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 | |
22 | namespace { |
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 | |