AArch64TargetMachine.cpp revision 263509 
1//===-- AArch64TargetMachine.cpp - Define TargetMachine for AArch64 -------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the implementation of the AArch64TargetMachine
11// methods. Principally just setting up the passes needed to generate correct
12// code on this architecture.
13//
14//===----------------------------------------------------------------------===//
15
16#include "AArch64.h"
17#include "AArch64TargetMachine.h"
18#include "MCTargetDesc/AArch64MCTargetDesc.h"
19#include "llvm/PassManager.h"
20#include "llvm/CodeGen/Passes.h"
21#include "llvm/Support/TargetRegistry.h"
22
23using namespace llvm;
24
25extern "C" void LLVMInitializeAArch64Target() {
26  RegisterTargetMachine<AArch64TargetMachine> X(TheAArch64Target);
27}
28
29AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
30                                           StringRef CPU, StringRef FS,
31                                           const TargetOptions &Options,
32                                           Reloc::Model RM, CodeModel::Model CM,
33                                           CodeGenOpt::Level OL)
34  : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
35    Subtarget(TT, CPU, FS),
36    InstrInfo(Subtarget),
37    DL("e-p:64:64-i64:64:64-i128:128:128-s0:32:32-f128:128:128-n32:64-S128"),
38    TLInfo(*this),
39    TSInfo(*this),
40    FrameLowering(Subtarget) {
41  initAsmInfo();
42}
43
44namespace {
45/// AArch64 Code Generator Pass Configuration Options.
46class AArch64PassConfig : public TargetPassConfig {
47public:
48  AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
49    : TargetPassConfig(TM, PM) {}
50
51  AArch64TargetMachine &getAArch64TargetMachine() const {
52    return getTM<AArch64TargetMachine>();
53  }
54
55  const AArch64Subtarget &getAArch64Subtarget() const {
56    return *getAArch64TargetMachine().getSubtargetImpl();
57  }
58
59  virtual bool addInstSelector();
60  virtual bool addPreEmitPass();
61};
62} // namespace
63
64TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
65  return new AArch64PassConfig(this, PM);
66}
67
68bool AArch64PassConfig::addPreEmitPass() {
69  addPass(&UnpackMachineBundlesID);
70  addPass(createAArch64BranchFixupPass());
71  return true;
72}
73
74bool AArch64PassConfig::addInstSelector() {
75  addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
76
77  // For ELF, cleanup any local-dynamic TLS accesses.
78  if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
79    addPass(createAArch64CleanupLocalDynamicTLSPass());
80
81  return false;
82}
83