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 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "AArch64.h"
14 #include "AArch64TargetMachine.h"
15 #include "MCTargetDesc/AArch64MCTargetDesc.h"
16 #include "llvm/PassManager.h"
17 #include "llvm/CodeGen/Passes.h"
18 #include "llvm/Support/TargetRegistry.h"
19 
20 using namespace llvm;
21 
22 extern "C" void LLVMInitializeAArch64Target() {
23   RegisterTargetMachine<AArch64TargetMachine> X(TheAArch64Target);
24 }
25 
26 AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
27                                            StringRef CPU, StringRef FS,
28                                            const TargetOptions &Options,
29                                            Reloc::Model RM, CodeModel::Model CM,
30                                            CodeGenOpt::Level OL)
31   : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
32     Subtarget(TT, CPU, FS),
33     InstrInfo(Subtarget),
34     DL("e-p:64:64-i64:64:64-i128:128:128-s0:32:32-f128:128:128-n32:64-S128"),
35     TLInfo(*this),
36     TSInfo(*this),
37     FrameLowering(Subtarget) {
38 }
39 
40 namespace {
41 /// AArch64 Code Generator Pass Configuration Options.
42 class AArch64PassConfig : public TargetPassConfig {
43 public:
44   AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
45     : TargetPassConfig(TM, PM) {}
46 
47   AArch64TargetMachine &getAArch64TargetMachine() const {
48     return getTM<AArch64TargetMachine>();
49   }
50 
51   const AArch64Subtarget &getAArch64Subtarget() const {
52     return *getAArch64TargetMachine().getSubtargetImpl();
53   }
54 
55   virtual bool addInstSelector();
56   virtual bool addPreEmitPass();
57 };
58 } // namespace
59 
60 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
61   return new AArch64PassConfig(this, PM);
62 }
63 
64 bool AArch64PassConfig::addPreEmitPass() {
65   addPass(&UnpackMachineBundlesID);
66   addPass(createAArch64ConstantIslandPass());
67   return true;
68 }
69 
70 bool AArch64PassConfig::addInstSelector() {
71   addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
72 
73   // For ELF, cleanup any local-dynamic TLS accesses.
74   if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
75     addPass(createAArch64CleanupLocalDynamicTLSPass());
76 
77   return false;
78 }
79