LinkAllCodegenComponents.h revision 9ff542f2cce5bf7bf3cf9f692cf3ec0690ad2b3b 
1//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
2//
3//                      The LLVM Compiler Infrastructure
4//
5// This file was developed by James M. Laskey and is distributed under the
6// University of Illinois Open Source License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This header file pulls in all codegen related passes for tools like lli and
11// llc that need this functionality.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
16#define LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
17
18#include "llvm/CodeGen/Passes.h"
19#include "llvm/CodeGen/ScheduleDAG.h"
20
21namespace {
22  struct ForceCodegenLinking {
23    ForceCodegenLinking() {
24      // We must reference the passes in such a way that compilers will not
25      // delete it all as dead code, even with whole program optimization,
26      // yet is effectively a NO-OP. As the compiler isn't smart enough
27      // to know that getenv() never returns -1, this will do the job.
28      if (std::getenv("bar") != (char*) -1)
29        return;
30
31      (void) llvm::createSimpleRegisterAllocator();
32      (void) llvm::createLocalRegisterAllocator();
33      (void) llvm::createLinearScanRegisterAllocator();
34
35      (void) llvm::createBFS_DAGScheduler(NULL, NULL, NULL);
36      (void) llvm::createSimpleDAGScheduler(NULL, NULL, NULL);
37      (void) llvm::createNoItinsDAGScheduler(NULL, NULL, NULL);
38      (void) llvm::createBURRListDAGScheduler(NULL, NULL, NULL);
39      (void) llvm::createTDRRListDAGScheduler(NULL, NULL, NULL);
40      (void) llvm::createTDListDAGScheduler(NULL, NULL, NULL);
41
42    }
43  } ForceCodegenLinking; // Force link by creating a global definition.
44}
45
46#endif
47