AArch64TargetMachine.cpp revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
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/CodeGen/Passes.h"
20#include "llvm/PassManager.h"
21#include "llvm/Support/TargetRegistry.h"
22
23using namespace llvm;
24
25extern "C" void LLVMInitializeAArch64Target() {
26  RegisterTargetMachine<AArch64leTargetMachine> X(TheAArch64leTarget);
27  RegisterTargetMachine<AArch64beTargetMachine> Y(TheAArch64beTarget);
28}
29
30AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
31                                           StringRef CPU, StringRef FS,
32                                           const TargetOptions &Options,
33                                           Reloc::Model RM, CodeModel::Model CM,
34                                           CodeGenOpt::Level OL,
35                                           bool LittleEndian)
36  : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
37    Subtarget(TT, CPU, FS, LittleEndian),
38    InstrInfo(Subtarget),
39    DL(LittleEndian ?
40       "e-m:e-i64:64-i128:128-n32:64-S128" :
41       "E-m:e-i64:64-i128:128-n32:64-S128"),
42    TLInfo(*this),
43    TSInfo(*this),
44    FrameLowering(Subtarget) {
45  initAsmInfo();
46}
47
48void AArch64leTargetMachine::anchor() { }
49
50AArch64leTargetMachine::
51AArch64leTargetMachine(const Target &T, StringRef TT,
52                       StringRef CPU, StringRef FS, const TargetOptions &Options,
53                       Reloc::Model RM, CodeModel::Model CM,
54                       CodeGenOpt::Level OL)
55  : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
56
57void AArch64beTargetMachine::anchor() { }
58
59AArch64beTargetMachine::
60AArch64beTargetMachine(const Target &T, StringRef TT,
61                       StringRef CPU, StringRef FS, const TargetOptions &Options,
62                       Reloc::Model RM, CodeModel::Model CM,
63                       CodeGenOpt::Level OL)
64  : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
65
66void AArch64TargetMachine::addAnalysisPasses(PassManagerBase &PM) {
67  // Add first the target-independent BasicTTI pass, then our AArch64 pass. This
68  // allows the AArch64 pass to delegate to the target independent layer when
69  // appropriate.
70  PM.add(createBasicTargetTransformInfoPass(this));
71  PM.add(createAArch64TargetTransformInfoPass(this));
72}
73
74namespace {
75/// AArch64 Code Generator Pass Configuration Options.
76class AArch64PassConfig : public TargetPassConfig {
77public:
78  AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
79    : TargetPassConfig(TM, PM) {}
80
81  AArch64TargetMachine &getAArch64TargetMachine() const {
82    return getTM<AArch64TargetMachine>();
83  }
84
85  const AArch64Subtarget &getAArch64Subtarget() const {
86    return *getAArch64TargetMachine().getSubtargetImpl();
87  }
88
89  virtual bool addInstSelector();
90  virtual bool addPreEmitPass();
91};
92} // namespace
93
94TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
95  return new AArch64PassConfig(this, PM);
96}
97
98bool AArch64PassConfig::addPreEmitPass() {
99  addPass(&UnpackMachineBundlesID);
100  addPass(createAArch64BranchFixupPass());
101  return true;
102}
103
104bool AArch64PassConfig::addInstSelector() {
105  addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
106
107  // For ELF, cleanup any local-dynamic TLS accesses.
108  if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
109    addPass(createAArch64CleanupLocalDynamicTLSPass());
110
111  return false;
112}
113