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"
25 extern "C" void LLVMInitializeAArch64Target() {
26 RegisterTargetMachine<AArch64TargetMachine> X(TheAArch64Target);
29 AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
30 StringRef CPU, StringRef FS,
31 const TargetOptions &Options,
32 Reloc::Model RM, CodeModel::Model CM,
34 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
35 Subtarget(TT, CPU, FS),
37 DL("e-m:e-i64:64-i128:128-n32:64-S128"),
40 FrameLowering(Subtarget) {
44 void AArch64TargetMachine::addAnalysisPasses(PassManagerBase &PM) {
45 // Add first the target-independent BasicTTI pass, then our AArch64 pass. This
46 // allows the AArch64 pass to delegate to the target independent layer when
48 PM.add(createBasicTargetTransformInfoPass(this));
49 PM.add(createAArch64TargetTransformInfoPass(this));
53 /// AArch64 Code Generator Pass Configuration Options.
54 class AArch64PassConfig : public TargetPassConfig {
56 AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
57 : TargetPassConfig(TM, PM) {}
59 AArch64TargetMachine &getAArch64TargetMachine() const {
60 return getTM<AArch64TargetMachine>();
63 const AArch64Subtarget &getAArch64Subtarget() const {
64 return *getAArch64TargetMachine().getSubtargetImpl();
67 virtual bool addInstSelector();
68 virtual bool addPreEmitPass();
72 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
73 return new AArch64PassConfig(this, PM);
76 bool AArch64PassConfig::addPreEmitPass() {
77 addPass(&UnpackMachineBundlesID);
78 addPass(createAArch64BranchFixupPass());
82 bool AArch64PassConfig::addInstSelector() {
83 addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
85 // For ELF, cleanup any local-dynamic TLS accesses.
86 if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
87 addPass(createAArch64CleanupLocalDynamicTLSPass());