1 //===-- AArch64TargetMachine.cpp - Define TargetMachine for AArch64 -------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
14 //===----------------------------------------------------------------------===//
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"
26 extern "C" void LLVMInitializeAArch64Target() {
27 RegisterTargetMachine<AArch64TargetMachine> X(TheAArch64Target);
30 AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
31 StringRef CPU, StringRef FS,
32 const TargetOptions &Options,
33 Reloc::Model RM, CodeModel::Model CM,
35 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
36 Subtarget(TT, CPU, FS),
38 DL("e-m:e-i64:64-i128:128-n32:64-S128"),
41 FrameLowering(Subtarget) {
46 /// AArch64 Code Generator Pass Configuration Options.
47 class AArch64PassConfig : public TargetPassConfig {
49 AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
50 : TargetPassConfig(TM, PM) {}
52 AArch64TargetMachine &getAArch64TargetMachine() const {
53 return getTM<AArch64TargetMachine>();
56 const AArch64Subtarget &getAArch64Subtarget() const {
57 return *getAArch64TargetMachine().getSubtargetImpl();
60 virtual bool addInstSelector();
61 virtual bool addPreEmitPass();
65 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
66 return new AArch64PassConfig(this, PM);
69 bool AArch64PassConfig::addPreEmitPass() {
70 addPass(&UnpackMachineBundlesID);
71 addPass(createAArch64BranchFixupPass());
75 bool AArch64PassConfig::addInstSelector() {
76 addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
78 // For ELF, cleanup any local-dynamic TLS accesses.
79 if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
80 addPass(createAArch64CleanupLocalDynamicTLSPass());