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<AArch64leTargetMachine> X(TheAArch64leTarget);
27 RegisterTargetMachine<AArch64beTargetMachine> Y(TheAArch64beTarget);
30 AArch64TargetMachine::AArch64TargetMachine(const Target &T, StringRef TT,
31 StringRef CPU, StringRef FS,
32 const TargetOptions &Options,
33 Reloc::Model RM, CodeModel::Model CM,
36 : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
37 Subtarget(TT, CPU, FS, LittleEndian),
40 "e-m:e-i64:64-i128:128-n32:64-S128" :
41 "E-m:e-i64:64-i128:128-n32:64-S128"),
44 FrameLowering(Subtarget) {
48 void AArch64leTargetMachine::anchor() { }
50 AArch64leTargetMachine::
51 AArch64leTargetMachine(const Target &T, StringRef TT,
52 StringRef CPU, StringRef FS, const TargetOptions &Options,
53 Reloc::Model RM, CodeModel::Model CM,
55 : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, true) {}
57 void AArch64beTargetMachine::anchor() { }
59 AArch64beTargetMachine::
60 AArch64beTargetMachine(const Target &T, StringRef TT,
61 StringRef CPU, StringRef FS, const TargetOptions &Options,
62 Reloc::Model RM, CodeModel::Model CM,
64 : AArch64TargetMachine(T, TT, CPU, FS, Options, RM, CM, OL, false) {}
66 void 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
70 PM.add(createBasicTargetTransformInfoPass(this));
71 PM.add(createAArch64TargetTransformInfoPass(this));
75 /// AArch64 Code Generator Pass Configuration Options.
76 class AArch64PassConfig : public TargetPassConfig {
78 AArch64PassConfig(AArch64TargetMachine *TM, PassManagerBase &PM)
79 : TargetPassConfig(TM, PM) {}
81 AArch64TargetMachine &getAArch64TargetMachine() const {
82 return getTM<AArch64TargetMachine>();
85 const AArch64Subtarget &getAArch64Subtarget() const {
86 return *getAArch64TargetMachine().getSubtargetImpl();
89 virtual bool addInstSelector();
90 virtual bool addPreEmitPass();
94 TargetPassConfig *AArch64TargetMachine::createPassConfig(PassManagerBase &PM) {
95 return new AArch64PassConfig(this, PM);
98 bool AArch64PassConfig::addPreEmitPass() {
99 addPass(&UnpackMachineBundlesID);
100 addPass(createAArch64BranchFixupPass());
104 bool AArch64PassConfig::addInstSelector() {
105 addPass(createAArch64ISelDAG(getAArch64TargetMachine(), getOptLevel()));
107 // For ELF, cleanup any local-dynamic TLS accesses.
108 if (getAArch64Subtarget().isTargetELF() && getOptLevel() != CodeGenOpt::None)
109 addPass(createAArch64CleanupLocalDynamicTLSPass());